反应性碳类物种在基托诱导的口腔关闭中,在反应性氧类物种的下游发挥作用
Israt Jahan1, Md Moshiul Islam1,2, Toshiyuki Nakamura1
1Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.
Physiologia plantarum
|January 31, 2025
概括
奇托通过活性氧物种 (ROS) 和活性碳类物种 (RCS) 触发植物口腔关闭. 这项研究揭示了RCS在基托信号传递中作用于ROS的下游,在清理时抑制口腔关闭.
科学领域:
- 植物生理学 植物生理学
- 植物信号通道的信号通道.
- 生物化学 生物化学
背景情况:
- 酸盐 (CHT) 在植物中引起口腔关闭.
- 这一过程涉及到活性氧物种 (ROS) 和酸 (SHAM) 敏感的过氧酶.
- 已知反应性碳类物种 (RCS) 是其他通路中ROS下游的信号分子,但它们在CHT诱导的口腔关闭中的作用尚不清楚.
研究的目的:
- 为了调查RCS在酸盐 (CHT) 诱导的口腔关闭中的参与.
- 为了确定在CHT信号中ROS和RCS之间的关系.
- 阐明RCS在护卫细胞对CHT反应中的特定作用.
主要方法:
- 使用的转基因烟草 (Nicotiana tabacum) 过度表达阿拉比多普西斯·塔利亚纳2-阿尔卡特减少酶 (AER-OE) 和野生类型 (WT) 植物.
- 评估了响应CHT的口腔闭塞,有或没有RCS清洁剂 (卡诺辛,皮里多克萨明).
- 使用AER-OE植物,RCS清除剂和过氧化酶抑制剂 (SHAM) 测量了ROS和RCS积累.
主要成果:
- 在AER-OE烟草植物中,基托桑诱导的口腔关闭被抑制.
- RCS清洁剂抑制了WT烟草和Arabidopsis中CHT诱导的口腔关闭.
- 在WT工厂中,CHT显著增加了RCS水平,但在AER-OE工厂中没有.
- RCS积累,而不是ROS,受到AER-OE和RCS清理器的影响.
- SHAM抑制了CHT诱导的RCS积累,表明过氧化酶在RCS产生中的作用.
结论:
- 反应性碳类物种 (RCS) 在酸盐 (CHT) 信号传输中,在反应性氧类物种 (ROS) 下游发挥着至关重要的作用.
- 在Arabidopsis thaliana和Nicotiana tabacum中,RCS是CHT诱导的口腔关闭的组成部分.
- 这些发现澄清了CHT在植物保护细胞中启动的信号级联.
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