一种竹子bHLH转录因子PeRHL4在增强干旱和饥饿耐受性方面具有双重功能
Chenglei Zhu1,2, Zeming Lin1,2, Yan Liu1,2
1Key Laboratory of State Forestry and Grassland Administration/Beijing on Bamboo and Rattan Science and Technology, Beijing, China.
Plant, cell & environment
|April 22, 2024
概括
莫索竹的竹子可以使用.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物应激生理学 植物应激生理学
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 基本螺旋环-螺旋环 (bHLH) 转录因子调节植物生长和应激反应.
- 目前尚不清楚莫索竹 (Phyllostachys edulis) 中的ROOTHAILESS (RHL) bHLH基因的功能.
研究的目的:
- 在moso竹中识别和表征RHL基因.
- 研究一种特定的莫索竹RHL基因 (PeRHL4) 对干旱和酸盐饥饿的反应中的作用.
主要方法:
- 莫索竹bHLH基因的遗传学分析和保存模式分析.
- 在干旱和酸盐饥饿条件下的基因表达分析.
- 酵母单杂交 (Y1H),双化酶记者 (DLR) 和电泳性移动性转移试验 (EMSA) 来确定基因相互作用.
- 在转基因大米中过度表达PeRHL4,以评估其应激耐受性的功能.
主要成果:
- 在莫索竹中发现了14个bHLH基因 (PeRHL1-PeRHL14),分为三个分类.
- 干旱和酸盐饥饿诱导了PeRHL4的表达,并与PeTIP1-1和PePHT1-1共同表达.
- PeRHL4直接激活了PeTIP1-1和PePHT1-1的表达.
- 过度表达PeRHL4增强了转基因大米的干旱和酸盐饥饿耐受性,通过调节OsTIPs和OsPHT1s.
结论:
- 在莫索竹中,PeRHL4充当积极调节剂,增强对干旱和酸盐饥饿的耐受性.
- 干旱和酸盐饥饿诱导PeRHL4表达,然后激活参与水和酸盐运输的下游基因.
- 这项研究阐明了一种新的调节途径,用于莫索竹的非生物应激耐受性.
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