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博士毕业于南京农业大学,南京农大教授以通讯作者身份在一区Top期刊上发表研究论文

  • 2026-02-14 00:14:38
博士毕业于南京农业大学,南京农大教授以通讯作者身份在一区Top期刊上发表研究论文

近日,万建民院士团队在水稻花时调控机制研究方面取得重要进展。团队在《Plant Physiology》期刊上,发表了题为“The multifunctional protein OsAIM1 regulates floret opening and closure timing via jasmonic acid-mediated lodicule dynamics in rice”的研究成果。南京农业大学博士研究生胡渊、硕士研究生李海申(已毕业)、博士研究生侯海刚为论文的共同第一作者,万建民院士和周时荣教授为共同通讯作者。

本研究从一个命名为“osky”(oryza sativa kaiying)的粳稻突变体入手。该突变体的花器官结构正常,但每日开花时间延迟约50分钟,且花后颖壳不闭合率高达43.4%(野生型仅1.22%)。通过图位克隆,团队将控制该表型的基因锁定为OsAIM1。该基因编码一种定位于过氧化物酶体的多功能蛋白,参与脂肪酸β-氧化过程。进一步机制解析表明,OsAIM1通过催化β-氧化反应参与茉莉酸生物合成前体的生成,进而激活下游糖转运蛋白基因的表达。糖分在浆片细胞中的积累可调节细胞渗透压,驱动水分吸收与排出,最终实现对颖壳开合的精准调控。在osky突变体中,OsAIM1功能缺失导致茉莉酸合成受阻,影响糖分向浆片的运输,造成开花前吸水膨胀延迟、开花后萎缩过程受阻,从而表现为“开花晚、闭颖差”的表型。研究还发现,外源喷施茉莉酸甲酯不仅能提前日开花时间,还能使OsAIM1功能缺失突变体恢复正常的颖壳闭合能力,这为茉莉酸动态调控颖花开合过程提供了直接证据。

值得关注的是,对水稻种质资源的序列分析发现,OsAIM1编码区存在自然变异。酶活分析表明,籼型(HapB)酶活性更高。携带HapB的单株开花时间显著早于HapA单株。将籼型OsAIM1等位基因导入粳稻背景,可显著提前其开花时间。基于上述发现,团队提出了可能的应用方案:在育种中,通过选择适宜的OsAIM1等位基因(HapA或HapB),可调整亲本开花时间,促进籼粳杂交制种花期相遇;通过编辑不育系中OsAIM1基因,可诱导花后颖壳适度张开,延长异花授粉窗口期,随后在适当时机喷施JA,则可促进颖壳闭合,保障种子质量。

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  137. /yingpanguazai/ssd/ssd1/www/b.460.net.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /yingpanguazai/ssd/ssd1/www/b.460.net.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/b.460.net.cn/runtime/temp/b35eef690f41e64ad9e1c098cfc7d3bc.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/b.460.net.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000838s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001684s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000678s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000666s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001449s ]
  6. SELECT * FROM `set` [ RunTime:0.000496s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001403s ]
  8. SELECT * FROM `article` WHERE `id` = 464066 LIMIT 1 [ RunTime:0.001034s ]
  9. UPDATE `article` SET `lasttime` = 1772283807 WHERE `id` = 464066 [ RunTime:0.001486s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000671s ]
  11. SELECT * FROM `article` WHERE `id` < 464066 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000984s ]
  12. SELECT * FROM `article` WHERE `id` > 464066 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001320s ]
  13. SELECT * FROM `article` WHERE `id` < 464066 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002186s ]
  14. SELECT * FROM `article` WHERE `id` < 464066 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001714s ]
  15. SELECT * FROM `article` WHERE `id` < 464066 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001903s ]
0.192425s