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四川农业大学陈学伟教授团队最新论文

  • 2026-06-07 23:16:00
四川农业大学陈学伟教授团队最新论文

近日,四川农业大学陈学伟教授团队在The Crop Journal期刊上发表题为“Pathogen-inducible gene LRD6-6E315Q breaks the trade-off between disease resistance and yield in rice”的研究成果。四川农业大学朱孝波教授为该文第一作者,陈学伟教授和朱孝波教授为共同通讯作者。

研究团队首先对先前克隆的AAA型ATP酶基因LRD6-6进行研究,该基因是调控水稻免疫的关键基因,其显性负效应突变体LRD6-6E315Q的组成型表达虽能显著增强水稻的广谱抗性,但会导致植株株高降低、千粒重和结实率下降,同时增加稻米垩白度,严重影响产量和品质。

基于此,研究团队提出核心策略:利用病原菌诱导型启动子驱动LRD6-6E315Q表达,使其仅在病原菌侵染时激活表达以启动抗病反应,正常生长条件下则不表达或仅保持较低表达,避免对生长和产量造成负面影响。为筛选符合要求的理想启动子,研究团队分析了水稻与稻瘟病菌互作早期的转录组数据,从抗病和感病品种中均被诱导的基因中筛选出10个候选启动子,并通过多品种、多时间点验证,发现MIG1P、MIG4P、MIG6P三个启动子在稻瘟病菌侵染早期能快速被激活。

MIG6P表现出最优的应用潜力:基础表达活性极低,仅为水稻组成型启动子OsUBQ5P的千分之二;不受高温、干旱、高盐等非生物胁迫诱导,可防止环境胁迫导致的抗病基因误激活;能被稻瘟病菌、白叶枯病菌、纹枯病菌等多种病原菌早期诱导。

研究团队构建了MIG6P:LRD6-6E315Q基因表达载体,将其转化至水稻品种TP309中,获得的转基因水稻在正常生长条件下,株型、垩白度等农艺性状与野生型无显著差异,保持了正常的生长发育和产量潜力。而当受到病原菌侵染时,MIG6P被快速激活,驱动LRD6-6E315Q高效表达,通过显性负效应抑制野生型LRD6-6的功能,激活水稻免疫反应,显著增强了水稻对稻瘟病、白叶枯病、纹枯病的抗性。在自然发病的稻瘟病圃中,MIG6P:LRD6-6E315Q水稻的穗颈瘟发病率显著降低,且连续两年的籽粒产量均显著高于对照,成功实现了抗病性提升与产量稳定的协同。

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  1. CONNECT:[ UseTime:0.000721s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000889s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001694s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000355s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000542s ]
  6. SELECT * FROM `set` [ RunTime:0.000241s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000647s ]
  8. SELECT * FROM `article` WHERE `id` = 514376 LIMIT 1 [ RunTime:0.000549s ]
  9. UPDATE `article` SET `lasttime` = 1781025824 WHERE `id` = 514376 [ RunTime:0.008571s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000278s ]
  11. SELECT * FROM `article` WHERE `id` < 514376 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009334s ]
  12. SELECT * FROM `article` WHERE `id` > 514376 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000494s ]
  13. SELECT * FROM `article` WHERE `id` < 514376 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000844s ]
  14. SELECT * FROM `article` WHERE `id` < 514376 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.034895s ]
  15. SELECT * FROM `article` WHERE `id` < 514376 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.021100s ]
0.157007s