通过N-基-pipecolic酸介导的信号传导和电阻需要DAWDLE
Jung-Kai Hsu1,2, Hsin-Yi Hsieh1,2, Chien-Hau Huang1,2
1Biotechnology Center in Southern Taiwan, Academia Sinica, Tainan 711, Taiwan.
Plant physiology
|October 24, 2025
概括
阿拉比多普西斯菌中的Dawdle (ddl) 突变通过破坏N-酸-皮皮科力酸 (NHP) 信号传输,损害了系统性获得抵抗 (SAR). 这项研究揭示了DDL.
科学领域:
- 植物免疫力 植物免疫力
- 分子植物病理学 分子植物病理学
- 植物的信号传输.
背景情况:
- 植物系统性获得耐药性 (SAR) 提供了广泛的,长期的抗病原体防御.
- N-基-皮皮科力酸 (NHP) 是SAR启动和放大的一个关键移动信号.
- 调节NHP介导的SAR信号的分子机制尚未完全理解.
研究的目的:
- 为了确定NHP介导的信号传递和Arabidopsis的系统性抵抗的关键调节者.
- 描述Dawdle (ddl) 突变体在植物防御反应中的功能.
主要方法:
- 阿拉比多普西斯·塔利亚纳 (Arabidopsis thaliana) 遗传查和突变性特征.
- 转录组概况 (RNA-Seq) 分析基因表达变化.
- 代谢物分析,以评估NHP和酸 (SA) 水平.
- 用NHP和病原体注射进行植物处理 (Pseudomonas syringae pv. 番茄 - 一个月).
主要成果:
- 阿拉比多普西斯ddl突变在NHP治疗和病原体感染时表现出受损的全身耐药性.
- DDL对于参与免疫,SA信号和NHP代谢的NHP响应基因的表达至关重要.
- ddl突变影响SA和NHP水平,并降低植物对外源NHP的敏感性.
- 在SAR期间,DDL在PR1基因表达和系统转录重编程中发挥作用.
结论:
- DDL是植物中NHP介导的信号传导和系统阻力的关键调节器.
- DDL影响了SA和NHP等防御代谢物的生物合成和稳态.
- DDL可能特别介导NHP感知或下游信号通路,与SA信号不同.
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