蛋白激酶SnRK2.6酸化转录因子bHLH3以调节草果成熟期间的安托素稳态
Fuli Huang1, Mimi Sun1, Zhijin Yao1
1College of Plant Science and Technology, Beijing University of Agriculture, No.7 Beinong Road, Changping District, Beijing 102206, P. R. China.
Journal of experimental botany
|May 29, 2024
概括
草果的颜色是由酸 (ABA) 信号调节的. 该研究确定转录因子bHLH3通过激活UFGT基因表达来促进色化,而SnRK2.6通过酸化抑制了这一过程.
科学领域:
- 植物生物学 植物生物学
- 水果成熟的机制 果实成熟的机制
- 分子遗传学 分子遗传学
背景情况:
- 草 (Fragaria × ananassa) 的成熟是ABA调节的,但色彩信号仍然不清楚.
- 酸 (ABA) 是植物应激反应和水果发育中的关键激素.
- 了解水果的颜色路径对于提高水果质量至关重要.
研究的目的:
- 阐明 ABA 信号在草果色彩中的作用.
- 为了确定关键的调节因素,参与在成熟期间的安托素生物合成.
- 研究ABA信号组件与水果颜色发育之间的相互作用.
主要方法:
- 酵母两杂交查以识别相互作用的蛋白质.
- 使用共免疫沉和拉下测试确认蛋白质相互作用.
- 通过RT-qPCR和西式涂抹进行基因表达分析;使用过度表达和RNAi进行功能分析;使用DNA结合试验 (EMSA).
主要成果:
- 确定了bHLH3作为一种与ABA信号的负调节者SnRK2.6相互作用的转录因子.
- bHLH3通过直接激活UFGT基因表达来促进草水果的颜色,UFGT基因表达是关键的安托素生物合成基因.
- SnRK2.6酸化bHLH3,抑制其与UFGT促进剂的结合,并抑制着色.
结论:
- 提出了一种新型的ABA信号通路来调节草果的色彩.
- 在成熟期间减少SnRK2.6表达释放bHLH3,增强UFGT表达和水果颜色.
- 这一途径突出了控制非高潮水果成熟的复杂分子机制.
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