阿拉比多普西斯的ARID-HMGDNA结合蛋白15通过调节MYC2在花粉发育过程中调节斯蒙酸信号传递来调节斯蒙酸信号传递
Sonal Sachdev1, Ruby Biswas1, Adrita Roy1
1Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Kolkata 700091, WB, India.
Plant physiology
|June 26, 2024
概括
植物ARID-HMGDNA结合蛋白15 (AtHMGB15) 对于雄性异构体的发育至关重要. 它积极调节莉酸 (JA) 信号传输,确保Arabidopsis.在花粉的适当形成和功能.
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
- 激素信号传递的激素.
背景情况:
- 在开花植物中,雄性性质细胞的发育依赖于莉酸 (JA) 信号传递.
- 转录因子MYC2是叶茎和花粉发育期间JA信号的关键发起者.
- 在雄性性双胞胎细胞发育过程中,JA信号的精确调节还没有完全被理解.
研究的目的:
- 描述ARID-HMGDNA结合蛋白15 (AtHMGB15) 在Arabidopsis花粉发育中的作用.
- 调查AtHMGB15影响JA信号传递和雄性性质细胞的发展的分子机制.
主要方法:
- 对阿拉比多普西斯T-DNA插入突变体 (athmgb15-4) 的表型分析.
- 评估花粉形态,发芽和花粉管生长.
- 对JA水平的定量分析.
- 对JA生物合成和信号基因表达的分析.
- 研究AtHMGB15和MYC2.2.之间的蛋白质-蛋白质相互作用.
主要成果:
- athmgb15-4突变体在植物生长,种子组,花粉形态,发芽和花粉管生长方面表现出缺陷.
- 在athmgb15-4突变体中,JA水平和JA信号基因的表达显著降低.
- 外源性甲基斯蒙酸的应用挽救了花粉缺陷,证实了JA缺乏的作用.
- AtHMGB15与MYC2进行物理相互作用,形成一个转录复合体,激活关键JA信号基因 (MYB21,MYB24).
结论:
- 在HMGB15中,AtHMGB15充当了Arabidopsis中JA通路的积极调节者.
- 在HMGB15控制关键调节者的表达 (MYB21,MYB24),这对茎和花粉发育至关重要.
- 这项研究阐明了一种新的机制,将AtHMGB15与JA信号连接起来,为成功的雄性配体细胞发育提供信号.
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