与类固醇信号相关的ILI-OsAIF-OsbHLH92转录因子模块对抗性地控制了大米的叶角和粒度
Mingmin Lu1, Mingqian Liu1, Qin Luo1
1State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China.
Plant physiology
|December 20, 2024
概括
两种不典型的bHLH蛋白,OsAIF1和OsAIF2,负调节类固醇信号传递,叶子倾斜和谷粒大小. 它们与其他bHLH因子形成三反抗级联,以微调米生长.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 遗传学 是一个遗传学.
背景情况:
- 非典型的基本螺旋环-螺旋环 (bHLH) 转录因子是布拉西诺体 (BR) 信号通路的关键.
- 米增加的叶子倾斜 (ILI) 非典型bHLHs的子家族在BR中介的生长和发展中起着至关重要的作用.
研究的目的:
- 为了隔离和表征新的米ILI相互作用的非典型bHLHs.
- 阐明OsAIF1和OsAIF2在叶倾斜,粒径和BR信号传递中的作用.
主要方法:
- 淘汰突变和过度表达线的遗传分析.
- 细胞学分析.细胞学分析.
- 蛋白质相互作用研究.
主要成果:
- OsAIF1和OsAIF2被确定为与ILI相互作用的非典型bHLHs,可以负面调节叶的倾斜度和谷粒大小.
- 淘汰突变的OsAIF1和OsAIF2对BR表现出过敏,而过度表达线则表现出敏感性降低.
- OsAIF1和OsAIF2在物理上与正调节剂OsbHLH92.2相互作用并对抗它.
结论:
- OsAIF1和OsAIF2作为大米BR信号的主要负调节者,以协同和冗余的方式运作.
- 一个涉及非典型HLHs (ILIs,OsAIF1/OsAIF2) 和bHLH (OsbHLH92) 的三反抗级联通过BR信号调整米的发展.
- 这些发现提供了对平衡BR信号和大米增长的监管机制的见解.
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