华北农学报 ›› 2024, Vol. 39 ›› Issue (2): 116-125. doi: 10.7668/hbnxb.20194665

所属专题: 油料作物 盐碱胁迫 栽培生理

• 耕作栽培・生理生化 • 上一篇    下一篇

外源褪黑素对大豆幼苗盐胁迫的缓解效应

郭远航1,2, 王洪博1,2,3,4,5, 白宝伟6, 张磊1,2, 赵丰年1,2, 吕东雪1,2, 贾婷6, 王兴鹏1,2,3,4,5   

  1. 1 塔里木大学 水利与建筑工程学院,新疆 阿拉尔 843300
    2 塔里木大学 自治区教育厅普通高等学校现代农业重点实验室,新疆 阿拉尔 843300
    3 塔里木大学 塔里木绿洲农业教育部重点实验室,新疆 阿拉尔 843300
    4 中国农业科学院西部农业研究中心,新疆 昌吉 831100
    5 农业农村部西北绿洲节水农业重点实验室,新疆 石河子 832000
    6 塔里木大学 生命科学与技术学院,新疆 阿拉尔 843300
  • 收稿日期:2023-11-16 出版日期:2024-04-28
  • 通讯作者:
    王兴鹏(1978—),男,宁夏吴忠人,教授,博士,主要从事干旱区灌溉排水理论与节水灌溉研究。
  • 作者简介:

    郭远航(1996—),女,辽宁铁岭人,硕士,主要从事干旱区水土环境保护与修复技术研究。

  • 基金资助:
    新疆生产建设兵团重大科技项目(2021AA003); 塔里木大学校长基金(TDZKYS202301); 塔里木大学校级研究生科研创新项目(TDGRI202254)

Effects of Exogenous Melatonin on Salt Stress Reduction in Soybean Seedlings

GUO Yuanhang1,2, WANG Hongbo1,2,3,4,5, BAI Baowei6, ZHANG Lei1,2, ZHAO Fengnian1,2, LÜ Dongxue1,2, JIA Ting6, WANG Xingpeng1,2,3,4,5   

  1. 1 College of Water Hydraulic and Architectural Engineering,Tarim University,Alear 843300,China
    2 Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region,Tarim University,Alaer 843300,China
    3 Key Laboratory of Tarim Oasis Agriculture, Ministry of Education,Tarim University,Alear 843300,China
    4 Western Agricultural Research Center, Chinese Academy of Agricultural Sciences,Changji 831100,Xinjiang,China
    5 Key Laboratory of Northwest Oasis Water-Saving Agriculture,Ministry of Agriculture and Rural Affairs,Shihezi 832000,China
    6 College of Life Sciences,Tarim University,Alear 843300,China
  • Received:2023-11-16 Published:2024-04-28

摘要:

为探明外源褪黑素(MT)对大豆幼苗耐盐性的调节作用,筛选出不同盐胁迫下适宜的施用浓度。以大豆品种田友-2986为试验材料,设置3个盐浓度(低盐S3:3 g/L、中盐S5:5 g/L、高盐S7:7 g/L )和6个MT浓度(M0:0 μmol/L、M1:25 μmol/L、M2:50 μmol/L、M3:75 μmol/L、M4:100 μmol/L、M5:150 μmol/L ),分析了大豆幼苗形态参数、生物量、抗氧化酶活性及渗透调节物质含量。随着盐胁迫程度的增大,大豆幼苗的根系形态参数、生物量、根冠比、抗氧化酶活性和渗透调节物质含量降低,丙二醛含量增加。低盐(S3)和中盐(S5)胁迫下,外施50 μmol/L MT大豆根系总长度、侧根数、SOD和POD较不施加分别提高了52.30%,19.98%,74.10%,40.03%(低盐)和68.52%,19.24%,81.72%,37.42%(中盐);高盐(S7)胁迫下,外施75 μmol/L MT分别提高了71.17%,19.11%,80.79%和27.01%。盐胁迫下,外源25~100 μmol/L 的MT不同程度上促进了大豆幼苗生长,提高耐盐性。隶属函数综合评价表明,在低、中盐胁迫下,50 μmol/L MT的缓解盐害效果最好;高盐胁迫下,MT这一适宜浓度在75 μmol/L。MT缓解大豆幼苗盐害主要在于它提高抗氧化酶活性和渗透调节物质含量,降低了丙二醛含量,从而缓解了盐胁迫下大豆的氧化胁迫和渗透胁迫。

关键词: 大豆, 盐胁迫, 褪黑素, 抗氧化系统, 综合评价

Abstract:

To investigate the effect of exogenous melatonin (MT) on salt tolerance of soybean seedlings,and to screen the appropriate application concentration under different salt stress.The soybean variety Tianyou-2986 was used as the test material,and 3 salt concentrations (low salt S3:3 g/L,medium salt S5:5 g/L,high salt S7:7 g/L ) and 6 MT concentrations were set(M0:0 μmol/L,M1:25 μmol/L,M2:50 μmol/L,M3:75 μmol/L,M4:100 μmol/L,M5:150 μmol/L),the morphological parameters,biomass,antioxidant enzyme activity and osmoregulatory substance content of soybean seedlings were analyzed.With the increase of salt stress,the root morphological parameters,biomass,root-shoot ratio,antioxidant enzyme activity and osmoregulatory substance content of soybean seedlings decreased,while the malondialdehyde content increased.Under low salt (S3) and medium salt (S5) stress,The number of total length,lateral roots,SOD and POD of 50 μmol/L MT were increased by 52.30%,19.98%,74.10%,40.03% (low salt) and 68.52%,19.24%,81.72% and 37.42% (medium salt),respectively.Under high stress (S7),75 μmol/L MT increased by 71.17%,19.11%,80.79% and 27.01%,respectively.Under salt stress,exogenous 25—100 μmol/L MT promoted soybean seedling growth and improved salt tolerance to different degrees.The overall evaluation of the affiliation function showed that 50 μmol/L MT was the most effective in alleviating salt damage under low and medium salt stress,and the suitable concentration of MT was 75 μmol/L under high salt stress,and the main reason for the alleviation of salt damage in soybean seedlings was that MT increased the activities of antioxidant enzymes and osmoregulatory substance content,and reduced the content of malondialdehyde,which could alleviate oxidative and osmotic stresses of soybeans under salt stress.

Key words: Soybeans, Salt stress, Melatonin, Antioxidant system, Comprehensive evaluation

引用本文

郭远航, 王洪博, 白宝伟, 张磊, 赵丰年, 吕东雪, 贾婷, 王兴鹏. 外源褪黑素对大豆幼苗盐胁迫的缓解效应[J]. 华北农学报, 2024, 39(2): 116-125. doi: 10.7668/hbnxb.20194665.

GUO Yuanhang, WANG Hongbo, BAI Baowei, ZHANG Lei, ZHAO Fengnian, LÜ Dongxue, JIA Ting, WANG Xingpeng. Effects of Exogenous Melatonin on Salt Stress Reduction in Soybean Seedlings[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(2): 116-125. doi: 10.7668/hbnxb.20194665.