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OsMYB103针对并与AMD1相互作用,形成米中花粉发育的前循环

Ting Zou^1,2, Qiuyu Ye², Liuhui Lu²

¹State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, 611130, China.

The Plant journal : for cell and molecular biology

|April 17, 2025

概括

OsMYB103直接激活了ABERRANT MICROSPORE DEVELOPMENT1 (AMD1),这是大米花粉生产的关键因素. 这种相互作用形成了一个前循环,对于调节大米雄性生育能力至关重要.

科学领域:

植物生殖生物学植物生殖生物学
分子遗传学分子遗传学
转录法规转录法规

背景情况:

植物的雄性生殖发育依赖于复杂的转录性调节网络 (TRNs).
异常微胞发育1 (AMD1) 是一种关键的转录调节元件 (TRC),用于米花粉的生产.
在大米花粉发育过程中,AMD1的精确分子功能在很大程度上仍未被阐明.

研究的目的:

为了研究AMD1在花粉发育中的分子机制.
阐明OsMYB103和AMD1在调节大米男性生育能力方面的关系.
了解AMD1在更广泛的TRN中控制大米花粉发育的作用.

主要方法:

使用单个和双重突变 (AMD1和OsMYB103) 的基因分析.
基因表达分析,以评估目标基因调节.
在体内和体外生化分析以确认蛋白质-蛋白质相互作用.
研究RNA聚合酶II复杂组件的招募.

主要成果:

AMD1被确定为在米花粉发育过程中由OsMYB103激活的直接遗传下游目标.
双重突变的AMD1和OsMYB103显示更严重的下调目标基因比单一突变.
AMD1与OsMYB103有物理相互作用,增强OsMYB103对目标基因的激活,可能通过OsTFIIF2-2招募.
建议使用涉及OsMYB103和AMD1的前循环机制来调节大米雄性生育能力.

结论:

OsMYB103-AMD1转录级联精确地控制了大米的男性生育能力.
AMD1在TRN中起着至关重要的作用,它控制着米花粉的发育.
这些发现为植物雄性体育生成的调节网络提供了新的见解.

关键词:

在AMD1 AMD1中.这就是OsMYB103的原因.对于花粉来说,这是一个很好的选择.米 (Oryza sativa L.) 是一种大米.这是一张 tapetum tapetum.转录的监管组件转录的监管组件

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