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Nature Plants | 南京农业大学团队揭示水稻“借兵抗病”的完整分子机制:十七烷酸是关键信号

  • 2026-05-16 04:49:07
Nature Plants | 南京农业大学团队揭示水稻“借兵抗病”的完整分子机制:十七烷酸是关键信号
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植物通过主动招募有益根际微生物来增强免疫力，但其分子机制尚不明确。本研究发现，当稻瘟病发生时，水稻通过一条完整的OsMAPK-OsWRKY通路，经由根系分泌十七烷酸来招募根际芽孢杆菌。田间试验中，水稻根际芽孢杆菌的富集与较高的稻瘟病抗性相关。多组学整合分析表明，OsMKK4-OsMPK6级联反应的激活与芽孢杆菌的招募之间存在强相关性。OsMKK4和OsMPK6的功能缺失突变体分别使根际芽孢杆菌的丰度降低了82%和79%。作为OsMPK6的底物，转录因子OsWRKY24/53/70能够激活OsKCS2的表达，该基因编码一个参与十七烷酸生物合成的β-酮脂酰辅酶A合酶。OsWRKY24/53/70或OsKCS2的突变会使根系分泌的十七烷酸减少15-28%，并削弱芽孢杆菌的定殖能力。外源施用十七烷酸能够重现芽孢杆菌的招募效应和抗病性。总之，该研究结果表明，MAPK通路调控十七烷酸的合成，进而控制芽孢杆菌的招募以及水稻对稻瘟病的抗性。

靶基因与功能验证：OsKCS2合成十七烷酸直接招募芽孢杆菌并提高抗病性

原文链接：

https://www.nature.com/articles/s41477-026-02268-x

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  1. CONNECT:[ UseTime:0.000640s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000730s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000265s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000255s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000493s ]
  6. SELECT * FROM `set` [ RunTime:0.000215s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000523s ]
  8. SELECT * FROM `article` WHERE `id` = 547281 LIMIT 1 [ RunTime:0.000355s ]
  9. UPDATE `article` SET `lasttime` = 1778880266 WHERE `id` = 547281 [ RunTime:0.001610s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000229s ]
  11. SELECT * FROM `article` WHERE `id` < 547281 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000458s ]
  12. SELECT * FROM `article` WHERE `id` > 547281 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000364s ]
  13. SELECT * FROM `article` WHERE `id` < 547281 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001498s ]
  14. SELECT * FROM `article` WHERE `id` < 547281 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003476s ]
  15. SELECT * FROM `article` WHERE `id` < 547281 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001069s ]
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