现型交换机诱导细菌细菌生物膜的碎形形态
Jin Li1, Jin Wu1, Jiahao Cui1
1School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, China.
Environmental microbiology
|November 30, 2025
概括
营养水平通过改变细胞类型来控制Bacillus subtilis生物膜结构. 平衡的细胞种群最大限度地提高了生物膜的复杂性和表面粗性,揭示了关键的适应机制.
科学领域:
- 微生物学 微生物学
- 生物物理学的生物物理.
- 计算生物学 计算生物学
背景情况:
- 细菌细菌生物膜表现出由细胞行为和环境影响的复杂碎形结构.
- 控制生物膜上表面形态的机制尚不清楚.
- 现型差异化与生物膜中的空间模式有关.
研究的目的:
- 研究营养驱动的表型开关如何影响Bacillus subtilis生物膜上表面的形态复杂性和异质性.
- 在不同的营养条件下将细胞分化和行为与生物膜形态发生联系起来.
主要方法:
- 生物膜图像的综合实验分析与基于代理的模型.
- 在不同的营养度中量化生物膜形态 (碎形维度D,粗度Ra).
- 模拟的表型转变概率和基于基质可用性的机械相互作用,使用Monod动力学.
主要成果:
- 营养素的可用性调节了生物膜内的不同细胞表型的比例.
- 矩阵生成细胞通过异性增长来增强表面异质性和复杂性.
- 子形成和运动细胞生长调节复杂性,在平衡的种群比例下观察到峰值复杂性.
- 基于代理的模型准确地预测了生物膜形态学的实验趋势.
结论:
- 受代谢依赖和扩散影响的营养介导的表型转变是生物膜形态发生的关键驱动因素.
- 这项研究阐明了细胞分化和生物膜上表面形态在动态环境中的适应之间的关系.
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