OFP is a class of plant-specific transcription factors that play important roles in the regulation of plant organ morphogenesis and response to abiotic stresses.In order to study the characterization of soybean OFP transcription factor family members and their roles in drought stress and salt stress,bioinformatics methods were applied to identify and analyze soybean OFP family members.The results showed that:a total of 41 GmOFPs,named GmOFP-1—GmOFP-41,were identified in soybean;these genes were unevenly distributed on 19 chromosomes of soybean,encoding 152—414 amino acids;subcellular localization predicted that soybean OFP proteins were mainly localized in nucleus,chloroplasts,and mitochondria;a total of 10 conserved motifs were identified in soybean OFP proteins,conservative Motifs 1 and 2 were present in all OFP members.Phylogenetic analysis classified soybean and Arabidopsis OFP proteins into five subfamilies ClassⅠ—Class V,of which soybean OFP family genes were mainly distributed in ClassⅠ and Class Ⅲ.The collinearity analysis revealed that 75 pairs of genes in the soybean genome had collinearity,four pairs of genes had tandem duplications,and only two genes,GmOFP-2 and GmOFP-39,did not have collinearity,which indicated that gene fragment duplication was the main reason for the increase in the number of soybean OFP family members.The expression patterns of GmOFP gene family members under drought stress and salt stress treatments were analyzed by qRT-PCR,and the results showed that,compared with the control,16 members out of 41 GmOFP genes exhibited significant differences in gene expression levels after drought treatments,with significant up-regulation of the expression of GmOFP-15,GmOFP-17,and GmOFP-32,while the GmOFP-4,GmOFP-5,GmOFP-6,GmOFP-9,GmOFP-12,GmOFP-21,GmOFP-23,GmOFP-25,GmOFP-26,GmOFP-27,GmOFP-38,GmOFP-39,and GmOFP-40 were significantly down-regulated after drought treatment.Eight members of GmOFPs showed significant differences in gene expression levels after salt treatment,among which GmOFP-7,GmOFP-14,GmOFP-31,GmOFP-32,GmOFP-36,and GmOFP-40 were significantly up-regulated,and GmOFP-1 and GmOFP-15 were significantly down-regulated.The above results suggest that the soybean OFP gene family may have important functions in response to drought stress and salt stress.
06-0001-10_pic.png)
The soybean germination stage is greatly affected by low-temperature stress,which can have a significant impact on yield.In order to explore genes related to the response of soybean germination to low-temperature stress and investigate the biological processes underlying soybean germination tolerance to cold,this study conducted transcriptome sequencing on seeds germinating for three days from eight materials showing significant differences in low-temperature tolerance during germination.Differential expressed genes (DEGs) between materials tolerant and sensitive to low temperatures were identified and subjected to GO enrichment analysis,KEGG pathway enrichment analysis,and transcription factor analysis.Among 231 DEGs identified in 15 contrasting groups of low-temperature tolerance,159 DEGs were up-regulated and 72 DEGs were down-regulated in cold-sensitive soybeans.GO enrichment analysis revealed that DEGs were mainly involved in biological processes such as cellular processes (GO:0009987),metabolic processes (GO:0008152),biological regulation (GO:0065007),response to stimulus (GO:0050896),binding (GO:0005488),transporter activity (GO:0005215),and transcription regulator activity (GO:0140110).KEGG pathway enrichment analysis indicated that DEGs were significantly enriched in starch and sucrose metabolism pathways (ko00500).Genes involved in seed development (Glyma.03G144400, Glyma.19G147200,Glyma.10G027600,Glyma.10G247500,Glyma.20G147600),metabolic reactions (Glyma.05G004300,Glyma.17G086400),and genes encoding glutathione oxidase (Glyma.01G219400) were up-regulated in cold-sensitive materials.Fifteen transcription factors from families such as MYB,AP2/ERF,and NAC were identified among the 231 differentially expressed genes,suggesting that soybeans respond to low-temperature stress during germination by regulating various biological processes,metabolic pathways,and signal transduction pathways.
06-0011-10_pic.png)
Metacaspase (MC) belongs to arginine/threonine specific protease,studies have shown that it plays a role in programmed cell death.To investigate the distribution of MC family genes in the genome of Brassica napus and whether they respond to drought stress,this study systematically analyzed the physicochemical properties,phylogeny,gene structure,conserved domains,cis-acting elements,and expression patterns of MC family genes under drought(PEG6000)and abscisic acid(ABA)stress in B.napus.A total of 25 BnMC genes were identified.Chromosomal localization showed that the 25 BnMCs were distributed on 13 chromosomes.Subcellular localization prediction showed that 17 members of the BnMC family were localized in the nucleus and seven members were in the cytoplasm.The phylogenetic tree classified BnMC into two major classes (Type Ⅰ and Type Ⅱ) and four branches (Group A,Group B,Group C,and Group D).BnMCs of the same branch had similar gene structure and conserved motif distribution.The core promoter regions of BnMC contained four types of cis-acting elements:light response element,phytohormone response element,plant growth and development response element and stress response element.Among all the cis-acting elements related to abiotic stress responses,the abscisic acid response element (ABRE) was the most abundant,with a total of 79.All members contained this cis-acting element.The transcriptome sequencing revealed that the expressions of BnMC10,BnMC22,BnMC1,BnMC12 and BnMC8 were up-regulated and the expressions of BnMC4 and BnMC5 were down-regulated after drought treatment.The qRT-PCR assay showed BnMC10,BnMC8,BnMC1 and BnMC12 genes were expressed in both roots and leaves and were up-regulated by both PEG6000 and ABA,with BnMC1 showing the most significant up-regulating changes.In summary,the response of B.napus to drought stress involves the regulation of the expression level of MC family genes.
06-0021-10_pic.png)
To elucidate the molecular mechanisms underlying peanut pod responses to water stress,this study employed pot experiments combined with transcriptomic analysis.Using well-watered conditions as the control, we systematically investigated the effects of periodic drought and waterlogging stress during the flowering-pegging stage on yield,quality,and gene expression in peanut pods. Results demonstrated that both drought and waterlogging stresses significantly reduced peanut pod yield(by 26.43% and 77.69%,respectively)and crude fat content in kernels (by 9.46, 6.71 percentage points,respectively).Transcriptomic analysis further revealed 1 525 and 1 382 differentially expressed genes(DEGs)in the drought-stress and waterlogging-stress groups compared to the control, respectively, with down-regulated expression being predominant in both sets of DEGs. Specifically, drought stress suppressed six key metabolic processes related to lipid and fatty acid metabolism in peanut pods,with 88.38% of associated genes showing downregulated expression,indicating that lipid metabolic disruption may be the primary cause of yield and quality reduction under drought. Waterlogging stress predominantly interfered with pod metabolism and defense functions by downregulating genes associated with catalytic activity,transmembrane transport,redox reactions,and biosynthesis of secondary metabolites.Moreover, KEGG enrichment analysis indicated that metabolic pathways and biosynthesis of secondary metabolites were significantly affected under both water stress conditions. Key gene validation via qRT-PCR corroborated the RNA-seq data, confirming the reliability of the transcriptomic findings. In summary, this research elucidates the molecular basis of peanut pod response to water stress at the transcriptome level, demonstrating that lipid metabolic disruption is the primary factor underlying yield reduction and quality deterioration under drought stress, whereas peanut pods mitigate the adverse effects of waterlogging mainly by modulating the expression of genes associated with redox homeostasis and metabolic pathways.
06-0031-09_pic.png)
Salt stress causes a significant threat to crop yield and quality.As one of the pioneer crop species in salt tolerance research,barley holds critical significance;the exploration of its salt tolerance mechanisms is capable of providing a theoretical foundation for crop salt-tolerance breeding programs.Two naked barley landraces,namely B87 with salt-sensitivity and B94 with salt-tolerance,were employed as experimental materials.At the three-leaf stage,their seedlings were exposed to a 200 mmol/L NaCl treatment for 7 days.Subsequent to the treatment,the above-ground tissues were collected for transcriptomic and metabolomic sequencing.By means of integrated multi-omics analysis,this study was designed to elucidate the molecular mechanisms governing salt tolerance in naked barley.The results demonstrated that 2 240 differentially expressed genes (DEGs) and 198 differentially abundant metabolites (DAMs) were identified in B87 via transcriptomic and metabolomic profiling,whereas 923 DEGs and 232 DAMs were detected in B94.Venn diagram analysis further revealed that the salt-tolerant naked barley B94 contained 480 specific DEGs and 129 specific DAMs.Furthermore, GO and KEGG analyses were separately performed on the DEGs and DAMs. And the DEGs of B94 were significantly enriched in 11 unique pathways, while its DAMs were only significantly enriched in 1 unique pathway. In addition, correlation analysis between the transcriptome and metabolome was conducted, and it was found that the changes in genes and metabolites exhibited both consistency and inconsistency. These research efforts not only enhance the current understanding of the molecular mechanisms underlying salt tolerance in naked barley,but also provide valuable insights and candidate targets for the development of salt-tolerant naked barley cultivars in future breeding.
06-0040-10_pic.png)
β-Amylase (BAM) is involved in regulating various biological processes in plants and responds to multiple external stimuli such as hormones and abiotic stress. To explore the characteristics and expression patterns of the BAM gene family in maize, we performed a genome-wide identification of the maize BAM gene family using bioinformatics methods. We also analyzed the encoded proteins, chromosomal localization, gene structure,cis-acting elements, synteny analysis, tissue-specific expression, and the expression patterns of the genes after simulated hail stress and melatonin treatment. The results showed that 16 ZmBAM members were identified in maize, all of which contained the typical Glyco_hydro_14 domain, with most of them being hydrophilic proteins. Phylogenetic analysis indicated that ZmBAM protein can be divided into three groups, with genes in the same group sharing similar gene structures and motif distributions. Cis-acting element analysis suggested that the expression of most ZmBAM genes might be related to plant hormones, abiotic stress, and light responses. Synteny analysis revealed a certain level of homology between the maize BAM gene family and those of Arabidopsis and soybean, with a closer relationship to rice. qRT-PCR analysis showed that, under simulated hail stress, most genes were upregulated, and their expression was significantly upregulated after melatonin treatment. This study provided a reference for further understanding the function of the maize BAM gene family in response to abiotic stress.
06-0050-12_pic.png)
As an important subfamily of receptor kinases,cysteine-rich receptor kinases play a key role in plant growth and development.The aim of this study was to analyze the relationship between the GhCRK26 gene and the development of cotton fiber,and to provide a theoretical basis for the improvement of cotton fiber quality.This study selected upland cotton Line 9 and sea island cotton Xinhai 16,and collected samples at different periods of fiber development and root,stem and leaf tissues.The expression pattern of GhCRK26 was analyzed by qRT-PCR;the gene was cloned by PCR;a phylogenetic tree was constructed with the help of bioinformatics tools to predict the physicochemical properties of the protein,its transmembrane structure and signal peptide;the promoter cis-acting elements were analyzed by the PlantCare database;and the localization of the protein was clarified by the subcellular localization assay.The results showed that the expression of GhCRK26 gene showed highly significant differences at 10,20 and 30 days after flowering in two varieties;the highest expression levels were found in the leaves of Line 9,while in Xinhai 16,the expression of stem and leaves did not show significant differences.A 2 049 bp CDS sequence encoding 682 amino acids was successfully cloned.The evolutionary tree showed that GhCRK26 protein was the most distantly related to Hibiscus trionum,and the closest to Gossypium tomentosum and Gossypium barbadense;the protein was hydrophilic and unstable,containing a transmembrane structure and a signal peptide;methyl jasmonate and abscisic acid response elements were identified in the promoter region;and the subcellular localization confirmed that it was localized in the cell membrane.The above studies provide a basis for further in-depth analysis of the function of GhCRK26 gene in fiber development.
06-0062-09_pic.png)
To investigate the function of StIMPα in potato, this study used the potato cultivar Kexing No.1 as material and successfully cloned the StIMPα2 gene via PCR. Bioinformatic analysis revealed that the coding sequence (CDS) of StIMPα2 had a length of 1 590 bp, encoding a protein containing the typical domains of the IMPα family. Phylogenetic tree analysis indicated that StIMPα2 was most closely related to AtIMPα-1 and AtIMPα-2 from Arabidopsis thaliana, suggesting functional conservation. Furthermore, analysis of the StIMPα2 promoter region identified multiple cis-acting elements associated with responses to biotic and abiotic stresses. To determine its subcellular localization, a StIMPα2-GFP fusion expression vector was constructed and transiently expressed in leaves of Nicotiana benthamiana via Agrobacterium-mediated transformation. Confocal laser scanning microscopy showed that the GFP fluorescence signal was specifically enriched in the nucleus, confirming that StIMPα2 is a nuclear-localized protein. Expression pattern analysis demonstrated that StIMPα2 expression was significantly induced by abiotic stresses such as low temperature, high salinity, and drought, as well as by BTH (benzothiadiazole). For functional validation, StIMPα2 was overexpressed in N. benthamiana via Agrobacterium infiltration, followed by inoculation with Phytophthora infestans. Pathological phenotype analysis showed that compared with the control, the lesion area on leaves overexpressing StIMPα2 was significantly reduced. Meanwhile, Quantitative Real-time PCR detection of P. infestans biomass confirmed a significant decrease in pathogen biomass in StIMPα2-overexpressing plants. In conclusion, these results indicate that StIMPα2 is a nuclear-localized protein induced by various biotic and abiotic stresses, and it enhances resistance to P. infestans by positively regulating plant immune responses.
06-0071-06_pic.png)
The members of the Aux/IAA gene family encode proteins that regulate various developmental processes in plants,such as embryogenesis and seed development,by modulating the auxin (IAA) signal transduction pathway.To explore the role of Aux/IAA family genes in jujube embryo development,this study performed bioinformatics analysis and functional verification on the key genes of the Aux/IAA family that affect jujube embryo development,using transcriptome data of Huizao (a jujube variety with high embryo fertility) and Kongfusucui (a jujube variety with low embryo fertility).Results showed that an Aux/IAA family gene sequence with a length of 1 731 bp was obtained via gene cloning,which encoded 362 amino acids.Protein structure prediction indicated that its secondary structure was mainly composed of random coil and that it had a typical conserved domain of the IAA9 protein;thus,it was named ZjIAA9.Homology analysis revealed that ZjIAA9 was closely related to RGQ29_009000 in Quercus rubra and CFP56_014209 in Quercus suber.Transgenic Micro-Tom tomato plants were obtained via Agrobacterium-mediated leaf disc transformation.Determination of auxin content in transgenic Micro-Tom tomato plants showed that the IAA content in the pulp of transgenic plants was higher than that in non-transgenic plants,indicating that ZjIAA9 may regulate auxin biosynthesis.Compared with wild-type plants,transgenic plants showed a seedless or few-seeded phenotype,suggesting that jujube ZjIAA9 may be involved in regulating jujube embryo development.
06-0077-08_pic.png)
Hydrangea macrophylla is an ornamental plant with high aluminum(Al) tolerance and strong Al accumulation capacity.Its flower color is easily influenced by soil pH and the Al3+ content in sepals,yet the mechanisms underlying its Al tolerance remain poorly understood.The MYB transcription factor family plays a crucial role in plant stress responses.To investigate the function of MYB transcription factors in Al tolerance in H.macrophylla,this study used H.macrophylla 'Endless Summer' as experimental material.Gene cloning,bioinformatics,co-expression network,expression pattern analysis and yeast functional validation of HmMYB73 were conducted.The results showed that HmMYB73 encoded 266 amino acids,contained a typical R2R3 domain,and belonged to the R2R3-MYB subfamily.Genes co-expressed with HmMYB73 were involved in biological functions such as catalytic activity,transporter activity,response to stimulus and detoxification.Under Al treatment,HmMYB73 was significantly upregulated in the roots,leaves,and sepals of H.macrophylla,with the highest expression level observed in the roots,which was 16 times that of the control.Furthermore,overexpression of HmMYB73 significantly enhanced yeast tolerance to aluminum stress.In summary,HmMYB73 may be involved in the biological regulation during aluminum stress in H.macrophylla.
06-0085-07_pic.png)
During the reproductive phase of Uncaria rhynchophylla,stem hooks undergo conversion into peduncles,consequently diminishing stem hook yield.To identify key regulatory factors governing this organ homology shift between stem hooks and peduncles in U.rhynchophylla,tissues from stem hooks and flowers were utilized to isolate its floral meristem gene,UrAP1(APETALA1).Comprehensive bioinformatic characterization was subsequently performed to elucidate the physicochemical properties of its encoded product.Concurrently,qRT-PCR analysis was conducted to quantifiy the relative transcript abundance of UrAP1 across distinct tissues of vegetative and reproductive branches,aiming to clarify its functional role and regulatory network in floral organogenesis.Results demonstrated that the UrAP1 coding sequence (CDS) spanned 729 bp,encoding a 242 amino acid polypeptide.This sequence exhibited substantial homology(94% identity) with the AP1 gene from Cephalanthus occidentalis and harbored conserved MADS-box and K-box domains.Furthermore,the UrAP1 protein lacked transmembrane domains,with primary localization predicted within the nucleus.UrAP1 expression was detectable and relatively stable across leaves,stems,stem nodes,and stem hooks of vegetative shoots.In contrast,its transcript levels varied significantly in reproductive shoots,showing distinct abundances in leaves,stems,stem nodes,peduncles,and flower buds.Expression peaked in young buds during early flowering stages and subsequently declined as buds matured.Comparison of the expression profiling between the two growth phases suggests a crucial role of UrAP1 in regulating floral bud differentiation in U.rhynchophylla.
06-0092-08_pic.png)
To explore the disparities in overwintering rates and yields between Brassica napus L.and Brassica rapa L.in the cold and arid regions of the north,as well as to examine the correlation between diverse agronomic traits,yield,and cold resistance-enhancing traits,it utilized 45 B.napus L.and 22 B.rapa L.varieties as subjects.It conducted a statistical analysis of their overwintering rates,average yields and agronomic traits.It also studied seeding density experiments with B.napus L.and B.rapa L.varieties that exhibited similar yield levels,compared root traits between B.napus L.and B.rapa L..The results indicated that among the 67 varieties tested,the average overwintering rate of B.rapa L.(97.59%) was significantly higher than that of B.napus L.(65.87%).The average yield potential of B.napus L.was higher than that of B.rapa L..For B.rapa L.,which was capable of stable overwintering,increasing the seeding density significantly elevated the number of effective plants but did not augment the average yield.Conversely,for B.napus L.,its lower overwintering rate constrained the increase in the number of effective plants,thereby limiting the average yield.B.napus L.with a high overwintering rate exhibited agronomic traits such as higher branching positions and angular density,fewer secondary branches,total branches,and effective siliques per plant after overwintering.Comparison of root traits between B.napus L.and B.rapa L.showed that enlarged root systems,short hypocotyls,and growth points positioned below the ground surface were advantageous traits contributing to the robust cold resistance of B.rapa L..It proposes that breeding density-tolerance B.napus L.with root traits akin to those of B.rapa L.and with growth points situated below the ground surface represents a pivotal breeding direction for enhancing the overwintering rate of B.napus L.,fostering increased rapeseed yield,and ensuring oil supply stability.
06-0100-10_pic.png)
The study aimed to examine the differences in physiological responses to NaCl between these two sweet cherry scion-rootstock combinations,explore the physiological mechanisms governing how different sweet cherry scion-rootstock combinations respond to salt stress,and provide a basis for screening salt-tolerant rootstocks and cultivating sweet cherries in saline-alkali soils.One-year-old plants of the sweet cherry cultivar Meizao(M) grafted onto Gisela 6 (G6) and Colt (KT) rootstocks were used as experimental materials.A pot culture experiment was conducted to simulate NaCl stress,with determinations made on the contents of osmotic adjustment substances,activities of antioxidant enzymes,and photosynthetic gas exchange parameters.The results showed that NaCl treatment promoted the accumulation of osmotic adjustment substances such as soluble sugar,soluble protein,and proline in the leaves of the two sweet cherry scion-rootstock combinations.With the increase in NaCl treatment concentration,the soluble sugar content of M/G6 increased first and then decreased,while that of M/KT continued to increase.Under the 150 mmol/L NaCl treatment,the increase in proline content of M/KT (6.11 times) was significantly higher than that of M/G6 (1.74 times).The contents of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) increased with the increase in NaCl treatment concentration.However,the peroxidase (POD) activity of M/G6 reached its peak at 100 mmol/L,which was significantly higher than that of M/KT.With the increase in NaCl treatment concentration,the net photosynthetic rate (Pn) and stomatal conductance (Gs) of the leaves of the two sweet cherry scion-rootstock combinations gradually decreased,while the intercellular CO2 concentration (Ci) gradually increased.Non-stomatal limitation was the main factor for the decrease in Pn of the leaves of the two scion-rootstock combinations.M/G6 showed better salt tolerance under moderate salt stress (100 mmol/L),alleviating oxidative damage by relying on the accumulation of soluble sugar and the enhancement of POD activity.M/KT maintained osmotic balance through the accumulation of proline and the increase in SOD activity under high salt stress (150 mmol/L).Based on comprehensive evaluation,in actual production,M/KT can be considered as a reference option for slightly saline soil,and M/G6 is recommended for moderately saline soil.
06-0110-07_pic.png)
The aims were to study the effect of maize straw returning on soil fertility and productivity under wheat-maize rotation system in North China,and to explore the best way and suitable amount of maize straw returning.From 2021 to 2023,a field split-plot experiment was conducted in Quzhou County,Hebei Province to compare the effects of different maize straw returning methods and amounts on wheat growth,yield composition and soil organic matter content.There were two treatments in the main area,which were cutting and crushing.The sub-area was the amount of straw returning to the field,4 levels,which were 0,0.5,1.0,and 1.5 times of the amount of maize straw in the year.The results showed that compared with straw crushing,the yield of wheat increased by 4.3% under straw cutting treatment,the number of spikes increased by 7.6%,and the harvest index increased by 1.4%,with all significant difference in 2023.The N content of wheat straw was significantly increased by 0.04 percentage points,the N and P uptake of wheat aboveground were significantly increased by 10.8% and 14.3%,respectively(2022),but the K content of wheat straw was significantly reduced by 0.13 percentage points(2023).Cutting treatment could significantly promote the growth of wheat before and after winter,and the NDVI value at jointing stage significantly increased by 11.9%(2022).Soil pH increased by 0.22 units(2023).With the increase of maize straw returning amount,wheat yield and NDVI value at jointing stage showed parabolic model of first increased and then decreased,the N,P and K absorption of above ground wheat showed a significant downward trend,and soil organic matter showed a continuous significant increase trend.Based on the growth potential and yield of wheat,the suitable returning ratio of straw cutting treatment was 58%—62%,and the suitable returning ratio of crushing treatment was 29%—42%.Under the conditions of this experiment,maize straw cutting returning has obvious advantages in promoting wheat growth,and increasing wheat yield.It can be popularized and applied in wheat-maize rotation areas that 58%—62% maize straw is returned into the soil.
06-0117-10_pic.png)
To clarify the alterations of rice straw decomposition,nutrients release and chemical components in coastal saline paddy soils under different nitrogen (N) application rate,for optimizing the technology of straw returning and realizing the efficient utilization of straw resources in coastal areas.The experimental site was located in Caofeidian District,Tangshan City,Hebei Province.The decomposition characteristics of rice straw and its lignocellulose,as well as the nutrient release characteristics of N,phosphorus (P) and potassium (K) were studied,using a 360-day straw-bag burying method with four different N fertilizer levels,including N0 (0 kg/ha),N1 (225 kg/ha),N2 (300 kg/ha) and N3 (375 kg/ha).Pyrolysis gas chromatography-mass spectrometry (Py-GC-MS) method was used to study the dynamic alterations of principal chemical components of the rice straw residues.The results showed that:the decomposition period of rice straw was divided into three stages,namely,rapid decomposition (0—30 d),slow decomposition (30—210 d) and slow decomposition (210—360 d),and the average decomposition rate of rice straw was 72.5% after 360 days with different N application rates.Increasing N application significantly increased the decomposition rate of rice straw.Compared with the N0 treatment,the N1,N2 and N3 treatments,increased the straw decomposition rate by 6.1, 7.4 and 9.2 percentage points,respectively.The trend of straw carbon (C) release rate was similar to that of straw decomposition rate,while the C release rate was only 43.2% at the end of the experiment.The nutrient release rates of rice straw were as follows:K>P>N.The N,P and K rapid release periods of rice straw was in the 0—30th (38.4%),0—60th (63.7%) and 0—15th (76.7%) days after straw decomposition,respectively.Both N and P of rice straw were enriched during the decomposition period.N application significantly increased the release of N from straw during the decomposition period,P in the early (0—15 d) and late (150—360 d) period,and K in the early period (0—15 d).Compared with the N0 treatment,the N1,N2,and N3 treatments,increased the straw N release by 6.6, 11.1, and 14.7 percentage points,P release by 2.2, 4.0, and 5.6 percentage points,and K release by 1.4, 2.1, and 2.8 percentage points,respectively.The lignocellulose decomposition rates of rice straw were as follows:hemicellulose>cellulose>lignin.Increasing N application significantly promoted the cellulose and hemicellulose decomposition rate of rice straw from day 0—90 and the lignin decomposition rate after day 90.Compared with the N0 treatment,the N1,N2,and N3 treatments,increased the cellulose decomposition rate of rice straw by 5.4, 7.3, and 8.4 percentage points, hemicellulose decomposition rate by 4.9, 6.4, and 7.4 percentage points,and lignin decomposition rate by 2.1, 5.1, and 5.7 percentage points, respectively.2-methoxy-4-vinylphenol,hydroxyacetone,2,3-dihydrobenzofuran,acetosyringone,eugenol,n-hexadecanoic acid,p-methylphenol,2,6-dimethoxyphenol,guaiacol,p-ethylphenol,and stigmasta-3,5-diene were the major (>1% relative) chemical components of straw residues during the decomposition period.Correlation analyses showed that straw decomposition rate,C release rate and cellulose,hemicellulose and lignin decomposition rates,were significantly positively correlated with eugenol,acetosyringone and 2,3-dihydrobenzofuran,while significantly negatively correlated with hydroxyacetone;straw P release rate was significantly positively correlated with hydroxyacetone and significantly negatively correlated with p-ethylphenol,eugenol and acetosyringone;straw K release rate was significantly correlated with p-ethylphenol,eugenol,acetosyringone and 2,3-dihydrobenzofuran,while significantly positively correlated with hydroxyacetone.In conclusion,increasing N application could promote the decomposition rates of rice straw and its lignocellulosic cellulose,and the nutrients release of straw N,P and K in coastal saline paddy field.The recommended optimal N application rate was 300 kg/ha under straw returning 10 500 kg/ha in coastal saline soils.p-ethylphenol,eugenol,acetosyringone,2,3-dihydrobenzofuran,hydroxyacetone,and stigmasta-3,5-diene could indicate the process of straw decomposition in straw residues.Py-GC-MS technique shows a good capability to monitor the chemical components alterations of straw residues,further deepening the understanding of straw decomposition mechanism.
06-0127-12_pic.png)
To investigate the effects of climate warming and combined application of organic and inorganic fertilizer on soybean growth and yield,field experiments were conducted using infrared radiation warming systems to simulate temperature elevation.The experimental design included two temperature levels(T0:Ambient temperature;T1:Warming by 2.9 ℃)and two fertilization regimes(SF:Sole inorganic fertilizer;OF:Combined organic-inorganic fertilizer),aiming to examine the impacts of warming and fertilization practices on soybean dry matter accumulation,photosynthetic rate,leaf enzyme activities,and yield.Results demonstrated that compared to ambient temperature,warming shortened the pre-flowering and post-flowering growth periods by 3—4 d,5—6 d,respectively.Warming significantly reduced leaf nitrate reductase(NR)and glutamine synthetase(GS)activities during the pod-filling stage,decreased leaf area index(LAI)by 9.0%—13.7%,and suppressed net photosynthetic rate,collectively leading to 4.1%—19.3% reductions in post-flowering plant height and aboveground dry matter accumulation.In contrast,the combined organic-inorganic fertilization enhanced NR and GS activities,improved post-flowering photosynthetic efficiency,promoted plant growth,and increased the aboveground dry matter accumulation by 4.1%—15.3% compared to sole inorganic fertilization,with a significant interaction observed between NR and alanine aminotransferase activities.Yield analysis revealed that warming caused 9.7%—16.6%,13.3%—19.0% declines in pods per plant and grains per plant,respectively,resulting in 13.7%—21.1% yield reductions.Conversely,organic-inorganic fertilization increased grains per plant by 12.5% and pods per plant by 9.9%—10.5%,achieving 7.6%—10.8% yield improvements.Notably,significant positive correlations were detected among LAI,photosynthetic rate,nitrogen metabolism enzyme activities,and final yield.These findings demonstrate that climate warming inhibits post-flowering photosynthetic efficiency and aboveground growth in soybeans,while integrated organic-inorganic fertilization partially mitigates warming-induced yield losses through enhancing enzyme activities and photosynthetic performance,providing critical insights for adaptive agricultural practices under global warming scenarios.
06-0139-13_pic.png)
In order to find out the way to achieve further improvement in the yield of sesame,a field experiment was conducted using the sesame variety Yuzhi ND837 with two treatments application of three-nutrient compound fertilizer (M1:675 kg/ha) and co-application of three-nutrient compound fertilizer with bio-organic fertilizer (M2:405 kg/ha three-nutrient compound fertilizer+4 500 kg/ha bio-organic fertilizer).The study investigated the effects of organic-chemical fertilizer co-application on the canopy photosynthetic characteristics,and yield formation across different vertical layers of sesame canopy.The results demonstrated that M2 significantly increased the leaf area index at all canopy levels,enhanced the photosynthetically active radiation interception rate (PARi) in the upper and middle layer while reducing the PARi of the lower leaves.The M2 significantly improved the photosynthetic rate,SPAD values,and photosynthetic potential at all canopy levels,thereby significantly increasing dry matter accumulation in each layer and overall. This resulted in increases of 10.99% and 7.55% in the number of capsules per plant in the upper and middle layers respectively;increases of 5.69% and 4.96% in thousand-grain weight;increases of 16.77% and 10.61%in grain yield;and a total yield increase of 289.42 kg/ha,representing 14.43% increase.In conclusion,compared to conventional chemical fertilizer,the co-application of organic-chemical fertilizer optimizes the photosynthetic capacity of sesame at different canopy layers,particularly in the upper canopy,thereby enhancing the overall canopy photosynthetic efficiency and ultimately resulting in higher yields.
06-0152-08_pic.png)
In order to explore the effects of silicon fertilizer on lodging resistance,growth and development,yield,and quality of winter wheat,Kenmai 58 was used as the experimental material.The treatments included 15 kg/ha (Si1) and 30 kg/ha(Si2)silicon fertilizer applied as basal fertilizer,15 kg/ha (Si3) and 30 kg/ha(Si4) silicon fertilizer applied as topdressing at jointing stage,and no silicon fertilizer (CK).The stem lodging resistance at grain filling stage,plant growth,yield,and quality were measured.The results showed that Si4 significantly reduced the plant height,height of gravity center,and the length of the basal second internode.Compared with CK,Si3 increased the thickness of the basal second and third internodes by over 14.7%.Si2 and Si4 increased the plumpness and breaking resistance of the basal second or third internodes by 8.6%—18.7% and by 12.4%—49.2%,respectively.Nevertheless,silicon fertilizer had no effect on the diameter and dry weight of the basal internode.Moreover,silicon fertilizer increased the chlorophyll content (SPAD) of leaves at jointing stage,but had no effect on tillering,productive tiller percentage,dry matter accumulation,harvest index,yield,and main quality indexes.In summary,the application of silicon fertilizer improved the stem lodging resistance by lowering plant height,gravity center height,and basal internode length,while increasing the basal internode thickness,plumpness,and breaking resistance.Silicon fertilizer also increased chlorophyll content (SPAD) without adversely affecting wheat growth,grain yield,or quality.Silicon fertilizer could be applied either as basal fertilizer or topdressing at jointing stage.
06-0160-08_pic.png)
This study aims to establish a biocontrol bacteria screening system based on root exudates to screen biocontrol strains with strong rhizosphere colonization ability.Using this system,bacterial strains capable of synergistic control of cucumber Fusarium wilt in combination with spent mushroom substrate(SMS)were screened.The chemical composition of cucumber root exudates was modulated by pathogen stress and SMS induction.Chemotaxis,metabolic proliferation,and biofilm formation,which were colonization-related factors,were used as quantitative indicators for the tested strains.Efficient screening of rhizosphere-colonizing bacteria was achieved using capillary assays,96-well plate cultures,and biofilm formation tests.Among 200 bacterial strains isolated from the cucumber rhizosphere,significant differences were observed in chemotaxis,metabolic proliferation,and biofilm formation in response to root exudates.Using this screening system,Bacillus velezensis MTC-5 was screened as an outstanding strain across all screening indicators.Greenhouse experiments demonstrated that MTC-5 strain combined with SMS exhibited enhanced rhizosphere colonization ability and showed significant synergistic effects in disease suppression and plant growth promotion.Field trials revealed that the combined application of MTC-5 strain and SMS achieved a disease control efficacy of 74.5% against cucumber Fusarium wilt,which was 10.7,24.6 percent points higher than the efficacy of SMS or MTC-5 strain alone,respectively.It established a high-throughput biocontrol bacteria screening system based on root exudates,highlighting the critical role of root exudates in bacterial recruitment.The MTC-5 and SMS combination developed through this system demonstrated significant synergistic effects in controlling cucumber Fusarium wilt,providing new insights and technical support for biocontrol bacteria screening and application.
06-0168-09_pic.png)
The aim was to explore the role of the small G protein StRab5b in potato resistance to Verticillium wilt.The relative expression levels of the StRab5b gene in the roots of potato tissue culture seedlings(Hutou and Xiapodi)after inoculation with Verticillium dahliae were determined by qRT-PCR.The biomass of V.dahliae in the roots,the lesion area on potato leaves,the content of hydrogen peroxide(H2O2),the content of malondialdehyde(MDA),and the activity of antioxidant enzymes were detected in the transgenic potato lines L7,L8,and L10 overexpressing StRab5b(StRab5b-L7,StRab5b-L8,StRab5b-L10)and the non-transgenic plants(CK)after inoculation with V.dahliae.The disease index was calculated using the pot culture method with the StRab5b-L7 transgenic line and the non-transgenic plants(CK).The results showed that the expression of the StRab5b gene was induced in potato after inoculation with V.dahliae.Compared with 0 h after inoculation,the relative expression levels of Hutou and Xiapodi increased significantly by 701.12% and 649.41% at 72 h after inoculation,respectively.After inoculation with V.dahliae,overexpression of StRab5b enhanced the resistance of potato to Verticillium wilt.Compared with CK,the lesion area on potato leaves in StRab5b-L7,StRab5b-L8,and StRab5b-L10 decreased significantly by 78.56%,66.56%,and 59.76% at 96 h after inoculation,respectively;the biomass of V.dahliae in the roots decreased significantly by 73.07%,51.69%,and 23.38% at 168 h after inoculation,respectively;the MDA content decreased significantly by 47.13%,33.08%,and 14.70% at 96 h after inoculation,respectively;the H2O2 content increased significantly by 83.67%,48.38%,and 20.15% at 72 h after inoculation,respectively,and the CAT activity increased by 53.54%,33.28%,and 12.62%,respectively;the SOD activity increased significantly by 53.01%,36.36%,and 16.54% at 48 h after inoculation,respectively;the POD activity increased by 55.58%,27.18%,and 1.73% at 96 h after inoculation,respectively;the APX activity increased significantly by 63.69%,44.27%,and 17.11% at 72 h after inoculation,respectively.Compared with CK,the disease rate and disease index of the StRab5b-L7 transgenic line decreased significantly by 43.33 percentage points and 86.07%,respectively.In conclusion,overexpression of the StRab5b gene enhanced the resistance of potato to Verticillium wilt.
06-0177-09_pic.png)
The objective of this research was to examine the structure and physicochemical characteristics of the ribosomal protein L8 gene (RPL8) in Sangsang yak,and to assess the expression of RPL8 in various tissues via qPCR,providing a theoretical foundation for further studies on the biological functions of RPL8 in yak.The RPL8 gene coding region (CDS) of Sangsang yak was cloned using kidney tissue cDNA as a template,and the gene sequence was analyzed using bioinformatics.RT-qPCR was employed to determine the relative expression level of RPL8 in different tissues of Sangsang yak.The CDS region of RPL8 gene in Sangsang yak was 456 bp,encoding 151 amino acids.Comparative analysis revealed that Sangsang yak had the highest homology with domestic cattle and the lowest similarity with American bear.Protein analysis identified 18 potential phosphorylation sites in RPL8 protein,molecular weight of 16.293 89 ku,total number of atoms of 2 325,amino acid isoelectric point of 10.90,instability coefficient of 41.81,and total average hydrophobicity of -0.687.The protein was predicted to be an unstable hydrophilic protein without transmembrane domains or signal peptide regions.Subcellular localization demonstrated that RPL8 protein was primarily located in the nucleus (65.20%).The secondary structure of RPL8 protein was composed of random coil (49.01%),extension chain (27.15%),β-corner (13.91%),and α-helix (9.93%).RT-qPCR results indicated that RPL8 gene was expressed in all 8 tissues of Sangsang yak,with the highest expression in heart,liver,and duodenal tissues,exhibiting significant differences compared to other tissues.
06-0186-08_pic.png)
To investigate the structure and function of the PPP1R11 gene in yaks,along with its expression pattern in eight distinct tissues,cDNA from the testicular tissue of Pamir yaks was utilized as the template,the CDS region sequence of the PPP1R11 gene in Pamir yaks was cloned via PCR technology,followed by bioinformatics analysis.The expression level of the PPP1R11 gene in eight tissues of the Pamir yak was determined using Real-time Fluorescence Quantitative PCR(RT-qPCR).The results showed that the coding sequence(CDS region)of PPP1R11 gene in Pamir yak was 324 bp and encoded 107 amino acids.The homology comparison showed that Pamir yak had the highest similarity with Bos mutus(100%)and the lowest similarity with Mus musculus(84.6%).The results of bioinformatics analysis showed that the molecular formula of PPP1R11 protein was C503H803N163O164S8,the total number of atoms was 1 641,the instability index and the total average hydrophilic index were 65.91 and -1.385,respectively.PPP1R11 protein had no signal peptide and transmembrane structure,and was mainly located in the nucleus.The protein had one glycosylation site and 19 potential phosphorylation sites.The secondary structure of the protein was mainly random curling,and it mainly interacted with PPP1R7,PPP1CA and NSFL1C.The RT-qPCR results showed that PPP1R11 gene was expressed differently in heart,muscle,fat,spleen,liver,pancreas,kidney and testis of Pamir yak,and the expression level of PPP1R11 gene was significantly higher in testis than in the other seven tissues.
06-0194-08_pic.png)
Intramuscular fat deposition,as a key factor affecting meat quality(e.g.tenderness,flavor,and juiciness),is closely related to the regulation of lipogenesis and lipid metabolism by long non-coding RNA(lncRNA).Based on the previous finding that the intramuscular fat content of Tan sheep was significantly higher than that of Dorper sheep and Small-tailed Han sheep,the dorsal longest muscle of these three sheep breeds was used as the target,and differentially expressed mRNAs(DE mRNAs)and lncRNAs(DE lncRNAs)and their related pathways were screened by transcriptome sequencing,with the aim of revealing molecular mechanism of high intramuscular fat deposition in Tan sheep.The results showed:836 DE mRNAs and 832 DE lncRNAs were identified in the Small-tailed Han sheep vs.Tan sheep group;578 DE mRNAs and 700 DE lncRNAs were screened in the Dorper sheep vs.Tan sheep group.The intersection of the two groups fielded a total of 226 DE mRNAs and 308 DE lncRNAs.Target gene prediction for the 308 DE lncRNAs identified 1 475 potential targets,including 687 co_expression(co-expressed)target genes and 788 co_localization(co-localized)target genes.GO and KEGG enrichment analysis of DE mRNAs revealed fat deposition-related pathways such as regulation of actin cytoskeleton and prolactin signaling pathway,with genes like FGF14 and FGF9 were reported to participate in animal fat metabolism.Enrichment analysis of co-expressed and co-localized target genes identified fat metabolism-related pathways,including the cAMP signaling pathway,prolactin signaling pathway,and insulin signaling pathway.Further functional analysis screened key genes associated with fat metabolism(CREBBP,ATP1B3,PPP1R3C, and PIK3R1),which may play crucial regulatory roles in ovine intramuscular fat deposition.The qRT-PCR results of 6 randomly selected DE mRNAs and 6 randomly selected DE lncRNAs were consistent with transcriptome sequencing data.
06-0202-10_pic.png)
To investigate the effect of polymorphisms in the glycogen branching enzyme 1(GBE1)gene on meat quality and flavor traits of Bashang long-tailed chickens.Target fragments were amplified using polymerase chain reaction(PCR)and sequenced directly to identify single-nucleotide polymorphisms(SNPs)in the GBE1 gene.Correlation analysis was performed between the SNPs and meat quality traits.In this study,analysis of 60 individuals revealed four SNP loci in the GBE1 gene(g.96619229T>C,g.96619243T>G,g.96619350C>T,and g.96619544C>T),each exhibiting three genotypes with dominant genotypes identified as TT,TT,CC,and CT,respectively.Chi-square tests confirmed that all loci were in Hardy-Weinberg equilibrium,with polymorphism information content(PIC)values of 0.262,0.262,0.332,and 0.373,indicating moderate polymorphism(0.25<PIC<0.50).Association analysis demonstrated significant correlations between GBE1 genotypes and meat quality traits.At g.96619229T>C,the TC genotype had higher leg muscle myristic acid content,and CC genotype showed significantly higher mean values of L* in leg muscle compared to other genotypes.At g.96619243T>G,the TG genotype was associated with higher leg muscle myristic acid content,and the GG genotype displayed significantly higher mean values of L* than others.At g.96619350C>T,the CT genotype had increased myristic acid content and abdominal fat rate but reduced mean values of L* in leg muscle At g.96619544C>T,the CT genotype showed higher levels of various fatty acids in the leg muscle and superior slaughter performance traits,including carcass weight,eviscerated weight,abdominal fat weight,and leg muscle weight,while the TT genotype exhibited higher postmortem 24-hour pH in leg muscle compared to other genotypes.Linkage disequilibrium analysis identified strong correlations among the first three SNP loci,resulting in six major haplotypes,with TTC being the predominant haplotype(0.708).These findings indicate that SNPs in the GBE1 gene are significantly associated with meat quality traits of Bashang long-tailed chickens.The strong linkage disequilibrium among intronic SNPs and the identification of TTC as a favorable haplotype provide valuable insights for breeding programs aiming to enhance meat quality in this chicken population.
06-0212-11_pic.png)
The FAD3 gene in plants plays a crucial role in regulating polyunsaturated fatty acid conversion and energy metabolism.To investigate the impact of FAD3B on muscle energy metabolism in mice,leg muscles were isolated from FAD3B transgenic mice (MF) and wild-type mice (MW),followed by total protein extraction.Protein samples were qualitatively and quantitatively analyzed,and peptides were separated via LC-MS/MS using a strong cation exchange column to obtain raw mass spectrometry data.The data were processed using mass spectrometry software,and a peptide-protein dataset with significant peaks was selected for cluster heatmap visualization to compare MF and MW protein samples.Subsequently,biostatistical and bioinformatics analyses,including functional prediction,were performed to identify candidate target proteins regulated by FAD3B that were ubiquitinated and associated with muscle energy metabolism.The results revealed 180 differentially ubiquitinated peptides enriched in 65 proteins.Among these,seven upregulated peptides were enriched in seven proteins,while 54 downregulated peptides were enriched in 31 proteins.GO analysis,KEGG analysis and STRING analysis were performed on all target proteins enriched with differentially ubiquitinated peptides,and it was found that most of the target proteins were related to glycolysis,muscle contraction,protein synthesis and catabolism.In conclusion,exogenous FAD3B gene transfer alters ubiquitination modification levels in cellular structural components,muscle development,and energy metabolism-related proteins in mice.This demonstrates that FAD3B may influence skeletal muscle growth not only by regulating polyunsaturated fatty acid conversion but also by modulating ubiquitination of key proteins.These results provide a novel theoretical foundation and molecular targets for studying the mechanism of FAD3B in skeletal muscle development.
06-0223-08_pic.png)
It aimed to successfully construct a stable human cervical cancer (HeLa) cell line with TRIM21 gene knockout using CRISPR/Cas9 gene editing technology.First,two specific sgRNAs (sgRNA1 and sgRNA2) targeting the TRIM21 gene were designed and synthesized,and they were cloned into the LentiCRISPRv2 vector using PCR amplification and seamless cloning techniques.Subsequently,the editing vectors were transfected into HeLa cells via electroporation,and monoclonal cell lines with successfully integrated editing vectors were obtained through puromycin screening.After validation by Western Blot and expansion of culture,a stable TRIM21-knockout HeLa cell line was established.Based on this cell line,we further investigated the role of TRIM21 in regulating the type I interferon signaling pathway.The experimental results demonstrated that TRIM21 knockout significantly suppressed the expression levels of MDA5,MAVS,and IRF3 in the cells,while also inhibiting the phosphorylation of IRF3,revealing the critical regulatory role of TRIM21 in the type I interferon signaling pathway.The TRIM21-knockout HeLa cell line successfully constructed in this study provides a reliable cellular model for in-depth research into the mechanism of TRIM21 in regulating viral replication and its role in innate immune responses.Furthermore,by optimizing experimental methods,this study confirmed the efficiency and stability of electroporation in constructing gene-knockout cell lines,offering technical references for the construction of other gene-knockout cell lines.
06-0231-08_pic.png)
Bimonthly, Started in 1962
CN 13-1101/S
ISSN 1000-7091
CODEN: HHUOA6
Responsible Institution: Hebei Academy of Agriculture and Forestry Sciences
Sponsored by: the Academy of Agricultural Sciences and Agricultural Association of Hebei, Beijing, Tianjin, Shanxi, Henan and Inner Mongolia.
Editor-in-chief: Qiang Zhang
Edited and Published by: Editorial Department of Acta Agriculturae Boreali-Sinica
《Acta Agriculturae Boreali-Sinica》Official Website
Wechat Official Account
Copyright © 2022 《Acta Agriculturae Boreali-Sinica》
