免疫受体XA21导致米中半男性不育性和谷物损失
Beatriz de Toledo Franceschi1, Satyam Vergish1, Yatendra Singh2
1Department of Plant Pathology, Institute of Food and Agricultural Sciences (IFAS), University of Florida, Gainesville, FL, United States.
Frontiers in plant science
|November 26, 2025
概括
植物耐药性 (R) 基因保护病原体,但可能导致健身成本. 在大米中,Xa21 R基因通过破坏斯酸 (JA) 信号传输,在低温下损害了生育能力.
科学领域:
- 植物免疫力 植物免疫力
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 植物拥有抗性 (R) 基因来对抗病原体,但这些可以给健康带来成本.
- 对R基因介导的健身成本的分子机制尚不清楚.
- 大米的Xa21基因赋予了对Xanthomonas oryzae pv.的耐药性. 一个叫做Oryzae的.
研究的目的:
- 调查与R基因表达相关的体能成本背后的分子机制.
- 阐明斯蒙酸 (JA) 信号在R基因介导的生育缺陷中的作用.
- 确定影响R基因功能和相关成本的环境因素.
主要方法:
- 分析表达Xa21基因的米植物的生育缺陷.
- 量化反应性氧物种 (ROS) 在人体中的积累.
- 测量与JA生物合成,信号和反应相关的基因表达.
- 评估外源性甲基斯蒙酸盐应用对菌脱落的影响.
主要成果:
- 在24°C时,Xa21的表达会导致剂量依赖的生育缺陷 (减少花粉活力,损害花粉脱落,谷物损失).
- Xa21植物在体中呈现ROS增加,JA相关基因表达减少.
- 在 Xa21 尖片中,雅斯蒙酸盐的含量降低了,而甲基雅斯蒙酸盐部分挽救了缺陷.
结论:
- R基因表达,特别是Xa21,与JA信号干扰和生育缺陷有关.
- 温度作为一个环境因素,调节R基因功能和健身成本.
- 这些发现解释了先前在Xa21位点对可转移元素积累的观察.
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