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通过在ABSCISIC ACID DEFICIENT2的上游开放阅读框架控制种子到苗木的过渡

Zhen Wang¹, Xiaofan Zhang^1,2, Can Zhou^1,2

¹Laboratory of Advanced Breeding Technologies, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.

Proceedings of the National Academy of Sciences of the United States of America

|June 6, 2025

概括

种子发芽依赖于mRNA的翻译. 抑制翻译会延迟发芽,而一种特定的基因变异 (ABA2 uORF) 会影响植物中的这一过程,从而提供了作物改善的潜力.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

种子发芽是植物生命周期的关键阶段,依赖于储存的信使RNA (mRNA).
精确的机制控制在发芽期间的翻译还没有完全理解.
转化调节在植物发育和应激反应中起着关键作用.

研究的目的:

研究转化控制在种子发芽中的作用.
阐明在发芽过程中转录和翻译调节之间的相互作用.
确定影响发芽和收获前发芽 (PHS) 的遗传因素.

主要方法:

在Arabidopsis中利用翻译抑制剂和核糖体缺陷突变体来研究发芽.
进行了转录组深度测序 (RNA-seq) 和多体形.
分析了上游开放阅读框架 (uORF) 在基因调节中的功能,特别是ABA2和OsABA2.

主要成果:

翻译的抑制显著延迟了Arabidopsis.的种子发芽.
在ABA2的5'非翻译区域的一个特定的uORF抑制了它的翻译,影响了发芽.
破坏大米中的OsABA2 uORF会减少收获前发芽 (PHS).
在与各种PHS表型相关的水品种中确定了两个主要的OsABA2 uORF单元型.

结论:

转化控制是种子发芽时间的关键决定因素.
uORFs中的遗传变异,例如ABA2 / OsABA2,显著影响植物特征,如发芽和PHS.
了解转化调节为改善作物提供了途径,特别是在管理种子休眠和发芽时.

关键词:

阿巴阿巴阿巴是什么意思收获前的发芽发芽发芽种子的休眠期和发芽期翻译翻译翻译翻译翻译翻译在 uORF 的情况下.

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