多代遗传驱动了细菌Bacillus subtilis与其宿主植物的共生相互作用
Omri Gilhar1, Liat Rahamim Ben-Navi2, Tsviya Olender3
1Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel; Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.
Microbiological research
|July 2, 2024
概括
有益的细菌 Bacillus subtilis 在根暴露后发展出多代记忆. 这种适应增强了后代的应激耐受性和竞争性根植殖,改善了共生植物微生物相互作用.
科学领域:
- 微生物学 微生物学
- 植物科学 植物科学
- 基因组学就是基因组学.
背景情况:
- 细菌细菌是一种促进植物生长的树脂细菌.
- 植物微生物相互作用对植物健康和农业生产率至关重要.
- 了解微生物适应宿主环境是利用有益细菌的关键.
研究的目的:
- 研究植物根排泄物对Bacillus subtilis健康和基因表达的多代影响.
- 确定与植物根的先前联系是否为B. subtilis. 提供了竞争优势.
- 阐明细菌适应植物环境的分子机制.
主要方法:
- 在暴露于Arabidopsis thaliana根分泌物后,在Luria-Bertani (LB) 中培养B. subtilis.
- 评估细菌的健康状况,耐压力和竞争性根植殖能力.
- 分析细菌转录组以确定基因表达和信号通路的变化.
主要成果:
- 与原始细菌相比,暴露于根部分泌物的细菌表现出更强的耐压力和更好的根植殖.
- 植物排泄物诱导了微生物的应激反应,并改变了B. subtilis.中的循环二-AMP信号传递.
- 这些适应性变化是跨世代遗传的,为后代提供了竞争优势.
- 观察到的适应性是可逆的,保持了整体的基因表达可塑性.
结论:
- 细菌细菌培养出植物根暴露的多代可逆"记忆".
- 这种细菌记忆,涉及压力酶激活,增强了共生健康和竞争能力.
- 这些发现强调了植物微生物相互作用的动态和适应性.
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