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Microbiology

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Microbial Diversity

Planctomycetes Cell Structure and Life Cycle

Description

Planctomycetes are a group of gram-negative bacteria known for unusual cell structures and a distinctive life cycle. They are mainly placed in two orders, Planctomycetales and Brocadiales. Many cells show stalks or other appendages and often appear in rosette groups.

A key feature of these bacter...

Transcript

浮霉菌门分为两个目——浮霉菌目(Planctomycetales)和厌氧氨氧化菌目(Brocadiales)。

这些革兰氏阴性菌具有独特的特征。它们通过出芽方式进行分裂。一些细菌具有柄状结构或附属物,而另一些则形成玫瑰花结样的细胞排列。某些物种在其细胞包膜中具有S层。

所有浮霉菌门细菌均表现出类似真核细胞细胞器的细胞内区室结构。

它们会产生一种称为pir ellulosomes的特殊结构,这是一种非单位膜包裹的区室,内含拟核、核糖体及其他细胞质组分。

Gemmata属中,核区被细胞膜的内陷所包裹,形成由真正的单位膜包围的结构。

黏球菌属(Isosphaera)是一种丝状滑行细菌,常见于温泉中。

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