一种内菌与类似防御素的蛋白 OsCAL1 相互作用,以调节大米中的分配
Tianyu Gu1, Ziai Qi2, Yating Wang2
1National Key Laboratory of Plant Molecular Genetics, Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China; School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization, College of Life Science, Hunan University of Science and Technology, Xiangtan 411201, China.
Molecular plant
|December 31, 2023
概括
一种新型的真菌内生菌,Fo10,和米防御素 OsCAL1 协作管理植物中的 (Cd) 水平. 这种共生减少了米粒中的Cd而不会影响产量,为Cd污染的环境提供了一种策略.
科学领域:
- 植物与微生物的相互作用
- 环境毒理学环境毒理学
- 分子植物病理学 分子植物病理学
背景情况:
- 类似于防御蛋白的蛋白质对天生的免疫力至关重要,在大米中,它们调节 (Cd) 流量.
- 防御素抗真菌活性和Cd-efflux功能之间的关系还不清楚.
- 内生菌可以影响植物的重金属积累.
研究的目的:
- 研究一种耐受Cd的内生植物Fusarium (Fo10) 和大米之间的相互作用,重点关注防类蛋白质OsCAL1.1.的作用.
- 为了确定防御素的抗真菌活性是否与Cd-efflux功能相关.
- 阐明这种共生控制大米中Cd积累的机制.
主要方法:
- 从Cd污染的水田中分离了内菌菌 (Fo10).
- 对微生物组进行比较分析.
- 评估Fo10对Cd的耐受性和对OsCAL的敏感性1.
- 分析调节Cd吸收,封存和排放的植物过程.
- 研究酸信号通路的作用.
- 测试Fo10对玉米,小麦,阿拉比多普西斯和西红中Cd耐受性的影响.
主要成果:
- Fo10耐受高Cd水平,但对OsCAL1敏感,该OsCAL1调解Cd流量.
- OsCAL1的动态调节了中的Fo10共生.
- Fo10协调植物对Cd管理的过程,包括吸收,真空封存和根球Fe斑块形成.
- 酸信号传输对于保持低细胞溶液Cd和降低谷物Cd而不会损失产量至关重要.
- 在玉米和小麦中,Fo10赋予了Cd耐受性,但在阿拉比多普西斯或西红中却没有.
结论:
- 由OsCAL1介导的Fo10与大米之间的相互作用提供了一种控制宿主植物中Cd积累的机制.
- 这种共生增强了植物适应高Cd环境,通过减少可食用的谷物中的Cd.
- 这些发现突出了减轻农作物中重金属污染的新战略.
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