微生物诱导的干旱耐受性通过ABA介导的根架构和表观遗传重编程
Khairiah M Alwutayd1,2, Anamika A Rawat1, Arsheed H Sheikh1
1DARWIN21, Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
EMBO reports
|June 6, 2023
概括
有益的沙漠细菌,Pseudomonas argentinensis SA190,增强植物对干旱的耐受性. 这种微生物利用植物酸 (ABA) 途径和表观遗传原始化来改善干旱下的作物表现.
科学领域:
- 植物与微生物的相互作用
- 植物应激生理学 植物应激生理学
- 微生物生物技术 微生物生物技术
背景情况:
- 有益的微生物有助于提高植物对干旱的耐受性.
- 微生物缓解干旱压力的机制尚未完全理解.
- 根内植物性细菌是农业应用的一个有希望的途径.
研究的目的:
- 研究沙漠细菌Pseudomonas argentinensis SA190在增强植物耐旱能力方面的作用.
- 阐明参与这种相互作用的分子机制,包括植物激素通路和表观遗传修饰.
- 为了证明SA190在干旱条件下改善作物表现的适用性.
主要方法:
- 阿拉比多普西斯塔利亚纳作为一个模型植物系统.
- 转录组和基因分析以研究基因表达和通路.
- 酸 (ABA) 途径分析和表观遗传学研究.
- 在干旱压力下对 (Medicago sativa) 进行SA190原料的应用.
主要成果:
- 阿尔及利亚虫 (Pseudomonas argentinensis SA190) 显著提高了阿拉比多普西斯 (Arabidopsis) 的干旱压力耐受性.
- SA190诱导的根形态发生和基因表达是由植物的酸 (ABA) 途径介导的.
- SA190的应用导致了以ABA-依赖的方式对基因促进者的表观遗传原始化.
- 在干旱条件下,SA190初始化改善了的性能.
结论:
- 一个单一的根内生菌菌株,Pseudomonas argentinensis SA190,可以给植物带来相当大的干旱压力耐受性.
- 该机制涉及ABA信号和表观遗传修饰,突出显示了一种新的植物微生物相互作用.
- 这一发现对开发基于微生物的策略有重大影响,以改善干旱和半干旱环境中的作物弹性.
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