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在防御模式中的细菌细菌:类似交换机的适应物对前列腺动物的掠食

Jordi van Gestel^1,2,3, Byoung-Mo Koo¹, Vanessa S Stürmer^2,3,4

¹Department of Microbiology and Immunology, University of California, San Francisco, CA 94158.

Proceedings of the National Academy of Sciences of the United States of America

|September 24, 2025

概括

像Bacillus subtilis这样的土壤细菌通过形成细丝来对虫捕食者 (Dictyostelium discoideum) 产生抵抗力,但这种生存策略会减缓生长. 这种权衡驱动了细菌的表型异质性.

科学领域:

微生物学微生物学
进化生物学进化生物学
生态生态学生态生态学

背景情况:

土壤微生物面临掠食,影响细菌进化.
之前的研究往往忽视了捕食,偏向于对细菌适应性的理解.
由Dictyostelium discoideum捕食的阿米巴菌是土壤细菌死亡的一个重要因素.

研究的目的:

研究Dictyostelium discoideum掠食对Bacillus subtilis生长和生存的影响.
确定B. subtilis. 捕食者抵抗性的遗传和表型机制.
了解掠食如何塑造细菌的适应性和异质性.

主要方法:

基因组规模突变B. subtilis.的突变屏幕.
进行新的进化实验来研究耐药性的发展.
在捕食压力下分析B. subtilis的生长,生存和表型切换.

主要成果:

抗捕食基因使线索或聚合物形成,阻碍阿米巴的摄入.
捕食者抵抗产生增长成本,创造了一个生存-增长的权衡.
细菌细菌在耐药 (生长缓慢) 和易感 (生长快) 状态之间表现出类似切换的适应.
在调节这些适应性行为方面,Spo0A酸化级联起着关键作用.

结论:

捕食是土壤细菌表型异质性的关键生态驱动因素.
细菌细菌使用动态的基因型和表型切换来应对掠食挑战.
这些发现表明,在捕食者逃避中,调节途径的祖先作用.

关键词:

这种细菌是 Bacillus subtilis.迪克托斯利乌姆 (Dictyostelium) 和迪斯科里乌姆 (Discoideum) 是两种类型的体.功能性基因组学功能性基因组学微生物生态学微生物生态学普罗提斯坦掠夺掠夺

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