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Nature Plants | 青岛农业大学梁文星团队揭示尖孢镰刀菌致病及番茄“御敌”的新机制

  • 2026-06-09 08:38:33
Nature Plants | 青岛农业大学梁文星团队揭示尖孢镰刀菌致病及番茄“御敌”的新机制
尖孢镰刀菌引起的枯萎病是番茄生产中的重要土传维管束病害,病原菌与寄主植物之间存在着持续的军备竞赛,深入探究病原菌与寄主互作的分子机制,对于病害的绿色防控及抗病精准分子育种意义重大。
2024年10月4日,青岛农业大学植物医学学院梁文星教授团队在Nature Plants发表了题为Plant PR1 rescues condensation of the plastid iron-sulfur protein by a fungal effector的研究论文,解析了病原菌效应蛋白在寄主胞内通过相分离凝聚铁硫蛋白抑制寄主活性氧产生,然而番茄质外体PR1可阻止效应蛋白进入寄主胞内从而介导抗性的分子机制。植物医学学院李敬涛副教授为第一作者、硕士研究生杨莉梅为共同第一作者,梁文星教授为唯一通讯作者。
为了研究尖孢镰刀菌的致病机制,课题组前期通过质谱鉴定了尖孢镰刀菌的分泌蛋白(Li et al., 2020),本研究发现其中一个分泌的毒性蛋白(FolSvp2)可以进入寄主胞内,通过自身相分离形成凝聚体,同时FolSvp2劫持寄主铁硫蛋白SlISP并与之共凝聚,抑制SlISP的质体定位,从而抑制SlISP介导的活性氧产生和寄主抗病性。进一步研究发现乙酰化修饰正调控FolSvp2介导的致病性,病原菌乙酰基转移酶FolArd1在赖氨酸K205残基上乙酰化修饰FolSvp2,该位点的乙酰化抑制了FolSvp2在真菌及寄主中的泛素化降解,从而促进FolSvp2的稳定和毒性。
病程相关蛋白PR1是最早发现的植物抗病蛋白之一。研究发现,为了克服效应蛋白FolSvp2介导的毒性,番茄PR1蛋白在质外体通过其N端与FolSvp2互作,从而抑制效应蛋白FolSvp2的胞内积累,进而恢复番茄铁硫蛋白SlISP的质体定位,维持番茄抗性。

值得一提的是,病原菌侵染会诱导寄主植物病程相关蛋白PR1的表达,关于PR1蛋白的研究已经有50多年的历史,但是PR1在植物防御中发挥作用的机制并不清楚。我们的前期研究结果表明,尖孢镰刀菌侵染早期会诱导番茄免疫重塑并上调PR1表达,通过其C端抗病小肽的产生诱导番茄系统免疫和枯萎病抗性(Li et al., 2022, 2023),本研究揭示了PR1蛋白通过其N端抑制效应蛋白异位的新功能,是PR1抗病功能的又一重要发现,为病原菌致病机制的解析以及病害绿色防控提供了重要依据和参考。

本研究得到了国家自然科学基金、山东省重点研发计划及山东省泰山学者等项目的资助。

论文链接:https://www.nature.com/articles/s41477-024-01811-y
参考文献:

Jingtao Li, Chenyang Wang, Limei Yang, Fahui Qiu, Yue Li, Yaning Zheng, Sihui Liu, Limin Song, and Wenxing Liang. Enhancing tomato resistance by exploring early defense events against Fusariumwilt disease. Phytopathology Research (2023) 5: 24.

Jingtao Li, Xiaoying Ma, Chenyang Wang, Sihui Liu, Gang Yu, Mingming Gao, Hengwei Qian, Mengjie Liu, Ben F. Luisi, Dean W. Gabriel, Wenxing Liang. Acetylation of a fungal effector that translocates host PR1 facilitates virulence. eLife (2022) 11: p. e82628.

Jingtao Li, Mingming Gao, Dean W Gabriel, Wenxing Liang, Limin Song. Secretome-wide analysis of lysine acetylation in Fusarium oxysporum f. sp. lycopersici provides novel insights into infection-related proteins. Frontiers in Microbiology (2020) 11: 559440.

请点击左下方的“阅读原文”,获取论文原文。


历史文章阅读:

1.全面系统论述 | 智慧植保及其发展建议
2. 康振生院士/胡小平教授课题组在小麦条锈病流行学研究方面取得新进展

3. 青岛农业大学梁文星团队在The EMBO Journal发表研究论文,揭示植物病原真菌清除寄主ROS新机制

4. 中国农业大学王海光实验室为植物病害严重度评估提供底层逻辑和方案

5. 安徽农业大学杀菌剂毒理与抗药性团队在烷基多胺类杀菌剂辛菌胺抑菌机制方面取得新进展

6. 南农钱国良课题组发现了生防细菌效应蛋白触发的群体淬灭

7. The ISME Journal: 效应蛋白转运后重塑“合作者”的生防活性,助力复配组装

8. New Phytologist:西北农林科技大学植物免疫研究团队揭示锈菌调控寄主基因表达新机制

9. Nat. Commun. | 浙江大学陶增团队与中国水稻研究所寇艳君团队合作揭示病原真菌基因转录沉默的独特表观遗传机制

10. JAFC:河南省农业科学院植保所作物土传病害生物防治创新团队在生防芽胞杆菌生物膜调控机制方面取得新进展

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  1. CONNECT:[ UseTime:0.000358s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000536s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000276s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002878s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000505s ]
  6. SELECT * FROM `set` [ RunTime:0.009610s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000769s ]
  8. SELECT * FROM `article` WHERE `id` = 532268 LIMIT 1 [ RunTime:0.001293s ]
  9. UPDATE `article` SET `lasttime` = 1782571272 WHERE `id` = 532268 [ RunTime:0.001082s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000860s ]
  11. SELECT * FROM `article` WHERE `id` < 532268 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000447s ]
  12. SELECT * FROM `article` WHERE `id` > 532268 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.014272s ]
  13. SELECT * FROM `article` WHERE `id` < 532268 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.023009s ]
  14. SELECT * FROM `article` WHERE `id` < 532268 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.033006s ]
  15. SELECT * FROM `article` WHERE `id` < 532268 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.057433s ]
0.215117s