阴影诱导的细胞壁加厚的调节在Moso竹:一个分子途径涉及XTH活动
Yali Xie1, Junlei Xu1, Xiangyi Li1
1Key Laboratory of National Forestry and Grassland Administration on Bamboo & Rattan Science and Technology, International Center for Bamboo and Rattan, State Forestry and Grassland Administration, Beijing, China.
Plant, cell & environment
|April 8, 2025
概括
植物通过调节细胞壁厚度来适应阴影. 低R/FR比抑制PheXTH3表达,通过WOX3b1-AP2-39-XTH3通路影响Moso竹的细胞壁发育.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 植物生理学 植物生理学
背景情况:
- 植物适应阴影对于生存和发育至关重要.
- 了解阴影诱导的形态发生需要阐明分子机制.
- 红光与远红光的比率 (R/FR) 是植物的一个关键的环境信号.
研究的目的:
- 研究莫索竹 (Phyllostachys edulis) 阴影适应的基础分子机制.
- 在低R/FR条件下识别参与调节细胞壁厚度的基因.
- 为了阐明控制细胞壁发育的调节途径,以应对阴影.
主要方法:
- 扫描电子显微镜 (SEM) 用于观察细胞壁结构.
- 定量逆转录聚合酶链反应 (qRT-PCR) 用于分析基因表达.
- 稳定的转基因Arabidopsis thaliana系用于研究基因功能.
- 酵母的一混合和双化酶 (双-LUC) 试验,以调查调控相互作用.
主要成果:
- 低R/FR比率抑制了Moso竹和管细胞中的细胞壁厚度.
- 克西洛格卢干Endotransglucosylase/hydrolase3 (PheXTH3) 被确定为一种对低R/FR有反应的基因,在血管系统中具有峰值活性.
- 在Arabidopsis中,PheXTH3增强了细胞壁加厚和素积累,而低R/FR降低了其表达,抑制了细胞壁加厚.
- 确定了一条涉及WOX3b1,AP2-39和XTH3的调节途径.
结论:
- 一个WOX3b1-AP2-39-XTH3分子通路,通过低R/FR比率调节,调节了Moso竹的细胞壁加厚.
- PheXTH3在阴影诱导的细胞壁发育中起着至关重要的作用.
- 这一途径提供了关于植物适应光环境的见解.
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