当前位置:首页>南京>南京农业大学高夕全课题组揭示ZmPIF4.1-ZmPTI1c-ZmMYB31模块调控玉米禾谷镰孢菌茎腐病免疫反应的分子机制

南京农业大学高夕全课题组揭示ZmPIF4.1-ZmPTI1c-ZmMYB31模块调控玉米禾谷镰孢菌茎腐病免疫反应的分子机制

  • 2026-06-01 11:49:32
南京农业大学高夕全课题组揭示ZmPIF4.1-ZmPTI1c-ZmMYB31模块调控玉米禾谷镰孢菌茎腐病免疫反应的分子机制

由禾谷镰孢菌(Fusariumgraminearum)导致的玉米禾谷镰孢菌茎腐病(Gibberella stalk rot, GSR)是最具破坏性的玉米病害之一,该病害严重影响玉米的产量和质量,同时也影响玉米籽粒机收技术的推广。类受体胞质激酶(receptor-like cytoplasmic kinase, RLCK)是一类缺乏胞外信号肽结构域和跨膜结构域的蛋白激酶家族。前期研究发现植物中RLCK家族成员参与介导抗病信号途径但目前鲜见关于玉米RLCK在抗真菌病害中的功能和机制的报道Pti1Pto-interacting 1)属于RLCK家族成员,已有报道Pti1在番茄、拟南芥、辣椒水稻等植物抵抗病原菌侵染、ROS稳态和响应多种非生物胁迫中具有重要作用。然而,关于ZmPTI1是否参与玉米对真菌病害的免疫及其作用机制仍处于未知阶段另外,虽然有大量研究表明环境因子尤其是光周期影响植物抗病性,但关于光周期影响玉米GSR抗性的分子机制目前尚未得到解析。

近日,南京农业大学高夕全教授课题组在The Crop Journal在线发表了题为“The ZmPIF4.1-ZmPTI1c-ZmMYB31 module regulates maize immunity to Gibberella stalk rot caused by Fusarium graminearum的研究论文。该研究发现ZmPTI1c负调控玉米GSR抗性,并通过磷酸化木质素合成基因的转录抑制因子ZmMYB31介导免疫响应。另外,光周期影响GSR抗性,光信号相关转录因子ZmPIF4.1能够转录激活ZmPTI1cZmMYB31则能够反馈抑制ZmPIF4.1ZmPTI1c的转录激活,从而减弱ZmPTI1cGSR抗性的负调控作用

研究发现突变体zmpti1cGSR抗性显著高于野生型。与长日照相比,短日照条件下玉米对GSR更为感病,而光周期可能在禾谷镰孢菌侵染早期(48 h之前)通过影响ZmPTI1c的表达调控GSR抗性。进一步研究发现,ZmPIF4.1转录激活ZmPTI1c,且F. graminearum侵染早期,短日照条件下高表达的ZmPIF4.1ZmPTI1c是玉米GSR抗性降低的原因之一。利用酵母双杂、荧光素酶互补成像及免疫共沉淀等方法证明ZmPTI1c与木质素合成基因的转录抑制子ZmMYB31互作;体外磷酸化试验证明ZmPTI1c能够磷酸化ZmMYB31ZmMYB31负调控GSR抗性,且zmpti1c zmmyb31突变体中的木质素含量显著增加,表明ZmPTI1cZmMYB31作为一个功能模块通过抑制木质素合成共同负调控玉米GSR抗性。此外,通过多种蛋白互作试验证明ZmMYB31能够ZmPIF4.1直接互作,ZmMYB31抑制ZmPIF4.1ZmPTI1c的转录激活活性。综上所述,该研究结果表明,光周期影响ZmPIF4.1ZmPTI1c的表达,短日照或长暗期条件下ZmPIF4.1表达量升高,且ZmPIF4.1能够转录激活ZmPTI1c的表达。被激活的ZmPTI1c通过磷酸化增强ZmMYB31的丰度,导致木质素的合成受到抑制,从而抑制玉米GSR抗性。另一方面,ZmMYB31则通过与ZmPIF4.1直接互作反馈抑制后者对ZmPTI1c的转录活性,解除ZmPTI1c通过ZmMYB31对下游木质素合成的抑制作用,从而提高玉米对GSR的抗性。

1ZmPTIc负调控玉米GSR抗性

2 ZmPTI1cZmMYB31互作抑制木质素的合成协同负调控GSR抗性

ZmMYB31抑制ZmPIF4.1转录激活ZmPTI1c的活性及ZmPIF4.1-ZmPTI1c-ZmMYB31模块调控GSR抗性的工作模型

作者和基金项目

南京农业大学作物遗传与种质创新和利用国重点实验室毕业生谢富贵博士该文第一作者高夕全教授为通作者。该研究得到江苏省种业振兴“揭榜挂帅”项目(JBGS[2021]002)、国家自然科学基金项目(32472095和国家重点研发计划战略性科技创新合作专项(2020YFE0202900)的资助。

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The Crop Journal (《作物学报(英文版)》)是中国科协主管,中国作物学会、中国农业科学院作物科学研究所和中国科技出版传媒股份有限公司共同主办的学术期刊,创刊于2013年10月。办刊宗旨为刊载作物科学相关领域最新成果,开展国际学术交流,促进我国作物科学研究水平及国际影响力的提升。主要刊登作物遗传与育种、作物基因组与分子育种、作物驯化与重要种质资源进化、作物分子生理与生态、作物栽培与耕作系统、作物与微生物互作、作物与环境互作及其适应性、作物基因组进化与选择、作物重要农艺性状发育、生物技术/工具/大数据等领域以第一手资料撰写的研究论文、研究简报以及专题综述等。2024年The Crop Journal的SCI影响因子为5.6,在JCR农学和植物学两个学科位于Q1区,并位列中科院分区农林类期刊一区。2019–2023年获中国科技期刊卓越行动计划重点项目资助,2024–2028年获中国科技期刊卓越行动计划二期英文梯队项目资助。

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  1. CONNECT:[ UseTime:0.000868s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000838s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000368s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000289s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000504s ]
  6. SELECT * FROM `set` [ RunTime:0.000202s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000509s ]
  8. SELECT * FROM `article` WHERE `id` = 562274 LIMIT 1 [ RunTime:0.000507s ]
  9. UPDATE `article` SET `lasttime` = 1780581458 WHERE `id` = 562274 [ RunTime:0.007692s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.001394s ]
  11. SELECT * FROM `article` WHERE `id` < 562274 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000554s ]
  12. SELECT * FROM `article` WHERE `id` > 562274 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006863s ]
  13. SELECT * FROM `article` WHERE `id` < 562274 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000919s ]
  14. SELECT * FROM `article` WHERE `id` < 562274 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000839s ]
  15. SELECT * FROM `article` WHERE `id` < 562274 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005458s ]
0.175255s