循环时钟通过远距离通信控制根发延长
Hikari Ikeda1, Taiga Uchikawa1, Yohei Kondo2
1Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan.
Plant & cell physiology
|August 8, 2023
概括
植物根毛发的生长受到光线和内部昼夜时钟的调节. 拍摄所接收的光和拍摄中的TOC1基因主要控制这种根发节律,证明了长距离信号效应.
科学领域:
- 植物生物学 植物生物学
- 时间生物学 时间生物学
- 分子遗传学 分子遗传学
背景情况:
- 植物利用昼夜时钟来适应日常环境变化.
- 阿拉比多普西斯 (Arabidopsis) 中的 hypocotyl 延长是细胞生长的昼夜时钟调节的一个模型.
- 生物钟在根部发育中的作用,特别是根部毛发的延长,尚不清楚.
研究的目的:
- 为了研究光线和昼夜时钟对根毛发延长的调节.
- 为了确定参与根毛发生长节奏的信号通路.
主要方法:
- 利用机器学习模型进行自动化根发图像分析.
- 对芽和根进行了部分光照照明实验.
- 在野生类型和TOC1突变型Arabidopsis之间进行了接种实验.
主要成果:
- 根头发的延长被证明是受到光线和昼夜时钟的控制.
- 关键的昼夜钟基因 (TOC1,CCA1) 调节了根头发长度的节奏性.
- 发芽中的光感知,而不是根,对于产生根头发的节奏性至关重要.
- 芽中的TOC1基因在建立根毛发生长节奏方面发挥着至关重要的作用.
结论:
- 根头发延长的生理时钟调节是依赖光线的,并受到射线衍生的信号的影响.
- 由TOC1介导的长距离发芽信号,集成了光线线索来控制根毛发生长节奏.
- 这项研究揭示了生物钟,光信号和长距离通信在植物发育中的相互作用.
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