蓝藻
运动性
分段丝状菌
微生物学
生物
细菌
化学
植物
细胞生物学
遗传学
环境科学
污水处理
活性污泥
环境工程
标识
DOI:10.1146/annurev-micro-051024-033328
摘要
Filamentous cyanobacteria are multicellular organisms that perform oxygenic photosynthesis and frequently exhibit surface motility. This review discusses the underlying mechanism facilitating motility in these organisms, with a focus on recent molecular and genetic studies. While previous explanations for this motility have proposed exotic mechanisms, the current data indicate that all filamentous cyanobacteria produce a similar motility-associated extracellular polysaccharide (EPS) or slime essential for movement and employ a type IV pilus (T4P) motor to power motility. The ( a ) regulation of the motor to facilitate coordinated polarity and phototaxis and ( b ) possible bidirectional feedback between the T4P and motility-associated polysaccharide are discussed as well. Finally, the role of motility in promoting diverse biological phenomena, including dispersal, phototaxis, biofilm formation, granulation, and symbiosis, is explored.
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