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线粒体局部酸盐过氧化酶5 (OsAPX5) 在米的耐热性方面发挥作用

Jie Wang¹, Weibiao Xu¹, Weixiong Long¹

¹Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, Jiangxi Provincial Key Laboratory of Rice Germplasm Innovation and Breeding, National Engineering Research Center for Rice, Nanchang 330200, China.

International journal of biological macromolecules

|August 5, 2025

概括

大米大米大米大米大米

科学领域:

植物生物学植物生物学
遗传学是一个遗传学.
分子生物学分子生物学

背景情况:

高温和热损害显著影响米产量.
识别热应激反应基因对于理解分子机制至关重要.
确定了一种对温度敏感的突变物,ts12,在高温下膜闭合受损.

研究的目的:

为了确定负责大米温度敏感性的基因.
为了阐明热应激反应的分子机制在米的发展.
了解OsAPX5在调节高温下膜闭合和产量方面的作用.

主要方法:

使用 γ-射线辐射对温度敏感突变物的选.
基于地图的克隆和转基因补充,以确定致病基因.
细胞学观察,反应性氧物种 (ROS) 测量,酵母二杂交,光酶和拉下测试.
基因表达水平的分析与黄斑发育有关.

主要成果:

对温度敏感的突变型TS12具有开放的表型,这是由于减少横向细胞层和缩短细胞长度.
基于地图的克隆确定TS12为甲酸盐过氧化酶OsAPX5,单核酸多态 (SNP) 导致截断的蛋白质.
OsAPX5与Osmads1相互作用,Osmads1是一种质发育调节剂,其缺乏导致ROS积累增加,Osmads1,Osmads5和Osmads34.4的表达减少.
OsAPX5-OsMADS1相互作用增强了OsMADS1和OsMADS34.4的转录活性.

结论:

OsAPX5是大米高温应激反应的关键调节者.
OsAPX5 影响 ROS 水平和 OsMADS 基因的表达,从而控制的发育和在热应激下种子的设置.
这项研究揭示了米耐热性的新型分子途径.

关键词:

阿斯科巴特过氧化酶的使用.阴暗的阴暗是什么意思热应激是一种热应激.在OSAPX5中使用.大米大米大米大米大米

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