华北农学报 ›› 2026, Vol. 41 ›› Issue (4): 1-11. doi: 10.7668/hbnxb.20196364

所属专题: 水稻 生物技术 热点论文

• 作物遗传育种·种质资源·生物技术 •    下一篇

超级稻南粳5718茎秆特性及其抗倒分子机制

宋悦1, 安红强2, 陈盈盈2, 赵庆勇2, 李程2, 朱镇2, 梁文化2, 周丽慧2, 赵凌2, 朱克明1, 张亚东1,2   

  1. 1 江苏大学 生物科学与技术学院, 江苏 镇江 212013
    2 江苏省农业科学院 粮食作物研究所, 国家耐盐碱水稻技术创新中心华东中心, 江苏 南京 210014
  • 收稿日期:2025-08-11 出版日期:2026-08-28
  • 通讯作者:
    朱克明(1980—),男,江苏无锡人,副教授,博士,硕士生导师,主要从事油菜分子生物学研究。
    张亚东(1978—),男,江苏靖江人,研究员,博士,硕士生导师,主要从事水稻遗传育种研究。
  • 作者简介:

    宋悦(2001—),女,江苏盐城人,在读硕士,主要从事水稻遗传研究。

  • 基金资助:
    国家重点研发计划项目(2023YFD1200900); 江苏省种业振兴揭榜挂帅项目(JBGS[2021]001)

Stem Characteristics of Super Rice Nanjing 5718 and the Molecular Mechanism of Its Lodging Resistance

SONG Yue1, AN Hongqiang2, CHEN Yingying2, ZHAO Qingyong2, LI Cheng2, ZHU Zhen2, LIANG Wenhua2, ZHOU Lihui2, ZHAO Ling2, ZHU Keming1, ZHANG Yadong1,2   

  1. 1 School of Biological Science and Technology, Jiangsu University, Zhenjiang 212013, China
    2 Institute of Food Crops, Jiangsu Academy of Agricultural Sciences,National Salt-tolerant Rice Technology Innovation Center,East China Center, Nanjing 210014, China
  • Received:2025-08-11 Published:2026-08-28

摘要:

超级稻品种南粳5718被列为农业农村部主导品种,在大面积生产中抗倒性表现出色。研究南粳5718的茎秆特性,解析其抗倒伏的分子机制,能够为抗倒伏水稻育种提供新的思路。以抗倒性较强的超级稻品种南粳5718和2个抗倒性较弱品种南粳518和南粳58为材料,比较农艺性状、茎秆特性与抗倒伏的相关性,发现南粳5718抽穗后20 d的株高、重心高度显著低于南粳518和南粳58,倒二节间长度、倒二和倒三节间的直径和茎壁厚度均高于南粳518和南粳58。茎秆结构性和非结构性碳水化合物含量测定结果表明,倒二和倒三节间的纤维素和木质素含量高是导致南粳5718强抗倒性的重要因素。进一步分析发现,3个品种倒二节间纤维素酶活性无显著差异。南粳5718和另外2个品种相比,102个纤维素和木质素合成代谢途径相关基因中只有pPLAⅢα(编码糖蛋白相关磷脂酶A)、CBF诱导因子bHLH002ILA1(编码丝裂原活化蛋白激酶)和转录因子基因NAC5在编码区存在错义突变。正调控纤维素合成的转录因子MYB61、负调控纤维素合成的细长秆基因SLR1PIL13、多半乳糖醛酸酶PG3、乙烯响应因子ERF34、矮秆基因DPH1、转录因子MYB7等基因的相对表达量在南粳5718和南粳58之间存在显著差异。木质素代谢过程中的4-香豆酸:辅酶A连接酶4CL3、MYB转录因子RLM1、对香豆素酯3-羟化酶CYP98A4、NAC转录因子SWN1和苯丙氨酸脱氨酶基因PAL1等基因的相对表达量在南粳5718和南粳58之间存在显著差异。关键基因在节间的表达差异是南粳5718茎秆高纤维素和木质素含量导致强抗倒性的原因。综上,超级稻南粳5718强抗倒性在茎秆特性上表现为具有较粗的节间直径和较大的茎壁厚度,节间较高的纤维素与木质素含量为其抗倒性提供了物质基础,纤维素和木质素合成通路中关键基因表达差异可能是南粳5718茎秆强抗倒性的主要原因。

关键词: 水稻, 抗倒伏, 茎秆, 纤维素, 分子机制

Abstract:

The super rice variety Nanjing 5718 has been designated as a leading variety by the Ministry of Agriculture and Rural Affairs and has demonstrated outstanding lodging resistance in large-scale production.Studying the stem characteristics of Nanjing 5718 and elucidating the molecular mechanisms underlying its lodging resistance can provide new insights for breeding lodging-resistant rice varieties.The lodging-resistant super rice Nanjing 5718 and two varieties,Nanjing 518 and Nanjing 58,with weak lodging resistance,were used as materials to compare agronomic traits,stem characteristics and their correlation with lodging resistance.The plant height and center of gravity of Nanjing 5718 were significantly lower than those of other varieties at 20 days after heading.The length of the second basal internode,stem diameter and stem wall thickness of the second and third basal internodes of Nanjing 5718 were significantly higher than other varieties at 20 days after heading.High content of cellulase and lignin in the stem was the important factor leading to strong lodging resistance.No significant differences in cellulase activity were observed in the second basal internodes among the three varieties.Compared to the other two varieties,only the pPLAⅢα,bHLH002,ILA1 and NAC5 among the 102 genes related to the cellulose and lignin biosynthetic pathways had missense mutations in their coding regions in Nanjing 5718.The relative expression levels of key cellulose biosynthesis-regulating genes,such as MYB61, SLR1,PIL13, PG3, ERF34,DPH1 and MYB7 were significantly different between Nanjing 5718 and Nanjing 58.Significant differences were also observed in the relative expression levels of some lignin metabolism genes between Nanjing 5718 and Nanjing 58:4CL3,RLM1,CYP98A4,SWN1,PAL1,and so on.The differential expression of those genes in basal internodes likely underlies the high cellulose and lignin content of stem and consequent strong lodging resistance in Nanjing 5718.In conclusion,the strong lodging resistance of the super rice variety Nanjing 5718 results from its increased internode diameter and stem wall thickness.The higher contents of cellulose and lignin in the internodes provide a structural basis for this enhanced lodging resistance.Variations in the expression of key genes involved in the cellulose and lignin biosynthesis pathways may be the primary factor contributing to the superior lodging resistance observed in Nanjing 5718.

Key words: Rice, Lodging resistance, Stem, Cellulose, Molecular mechanism

中图分类号: 

引用本文

宋悦, 安红强, 陈盈盈, 赵庆勇, 李程, 朱镇, 梁文化, 周丽慧, 赵凌, 朱克明, 张亚东. 超级稻南粳5718茎秆特性及其抗倒分子机制[J]. 华北农学报, 2026, 41(4): 1-11. doi: 10.7668/hbnxb.20196364.

SONG Yue, AN Hongqiang, CHEN Yingying, ZHAO Qingyong, LI Cheng, ZHU Zhen, LIANG Wenhua, ZHOU Lihui, ZHAO Ling, ZHU Keming, ZHANG Yadong. Stem Characteristics of Super Rice Nanjing 5718 and the Molecular Mechanism of Its Lodging Resistance[J]. Acta Agriculturae Boreali-Sinica, 2026, 41(4): 1-11. doi: 10.7668/hbnxb.20196364.