当前位置:首页>农业>山东农业大学生科院王晨晨/朱常香教授团队在TOP期刊(IF=7.7)发表科研成果:水稻条纹病毒NS2和NS3调控水稻生长素介导免疫的研究

山东农业大学生科院王晨晨/朱常香教授团队在TOP期刊(IF=7.7)发表科研成果:水稻条纹病毒NS2和NS3调控水稻生长素介导免疫的研究

  • 2026-03-27 19:10:20
山东农业大学生科院王晨晨/朱常香教授团队在TOP期刊(IF=7.7)发表科研成果:水稻条纹病毒NS2和NS3调控水稻生长素介导免疫的研究

Rice stripe virus NS2 and NS3 proteins jointly stabilize OsIAA25 to inhibit auxin-mediated immunity in rice文章发表在《Plant Physiology》。水稻条纹病毒(RSV)编码的NS2NS3蛋白可形成异二聚体,协同稳定水稻Aux/IAA家族的OsIAA25蛋白,通过干扰OsIAA25与生长素受体OsTIR1的互作,阻断其26S蛋白酶体介导的降解,进而抑制水稻生长素信号通路和生长素介导的免疫反应,最终促进RSV侵染;OsIAA25RSV侵染的关键易感因子,为培育RSV抗性水稻提供了重要分子靶点。

研究背景

RSV是水稻条纹病的病原,由灰飞虱传播,会导致水稻矮化、减产,严重威胁农业生产。生长素是调控植物生长与防御平衡的关键激素,病毒常通过操控植物激素通路实现侵染,而RSV与水稻生长素信号通路的互作机制尚不明确。RSVNS2NS3RNA沉默抑制子,可与多种宿主蛋白互作,但二者是否共同调控生长素信号通路,以及Aux/IAA家族蛋白在该过程中的作用仍待解析。

实验方法

以水稻LD10为野生型材料,构建NS3OsIAA25过表达株系、OsIAA25敲除株系及降解抗性的OsIAA25P98L突变体株系;利用酵母双杂交、荧光素酶互补成像、GSTpull-downCo-IP验证蛋白间互作;通过细胞无降解实验检测OsIAA25蛋白稳定性;采用微量热泳动技术定量蛋白结合亲和力;结合RNA-seqRT-qPCR分析RSV侵染后生长素信号通路相关基因的表达;经RSV人工接种和NAA(生长素类似物)处理,分析水稻表型及病毒抗性变化。

核心结果

NS3可特异性结合OsIAA25,且不与其他19个同源OsIAAs互作,该结合干扰了OsIAA25OsTIR1的互作,抑制其降解,而NS3不影响OsTIR1NAA的结合;NS2NS3形成异二聚体,且NS2也可直接结合OsIAA25,二者协同显著增强OsIAA25的稳定性;RSV侵染或过表达OsIAA25/OsIAA25P98L的水稻表现出矮化、冠根缩短的表型,且对NAA不敏感,RSV侵染率显著升高,防御基因表达下调;敲除OsIAA25的水稻则对RSV抗性显著提升,侵染率降低,防御基因表达上调;RSV侵染还会显著改变水稻生长素信号通路相关基因的表达模式。

研究结论

本研究揭示了RSV操控水稻生长素信号通路的新机制:RSV通过NS2-NS3复合物稳定OsIAA25,阻断生长素信号通路的激活,抑制水稻生长素介导的免疫反应,进而促进自身侵染,且该过程形成正反馈循环。OsIAA25作为RSV侵染的关键易感因子,其基因修饰或靶向NS3-OsIAA25互作的抑制剂研发,可为水稻RSV抗性育种提供新策略,也为解析植物病毒操控宿主激素通路的保守机制提供了新依据。

原文链接:

https://doi.org/10.1093/plphys/kiag080

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  1. CONNECT:[ UseTime:0.000663s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000829s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000291s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000274s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000510s ]
  6. SELECT * FROM `set` [ RunTime:0.000233s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000617s ]
  8. SELECT * FROM `article` WHERE `id` = 479456 LIMIT 1 [ RunTime:0.000472s ]
  9. UPDATE `article` SET `lasttime` = 1775392389 WHERE `id` = 479456 [ RunTime:0.003185s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000231s ]
  11. SELECT * FROM `article` WHERE `id` < 479456 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000929s ]
  12. SELECT * FROM `article` WHERE `id` > 479456 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000451s ]
  13. SELECT * FROM `article` WHERE `id` < 479456 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000599s ]
  14. SELECT * FROM `article` WHERE `id` < 479456 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001155s ]
  15. SELECT * FROM `article` WHERE `id` < 479456 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000780s ]
0.084832s