Ultrastructure and cell division of a facultatively parasitic strain of Bdellovibrio bacteriovorus
Ultrastructure and cell division of a facultatively parasitic strain of Bdellovibrio bacteriovorus
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DOI：
10.1128/jb.101.3.997-1004.1970
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发表时间：
1970-03-01
影响因子：
3.2
通讯作者：
Conti, S. F.
中科院分区：
文献类型：
--
作者：
Burnham, Jeffrey C.;Hashimoto, T.;Conti, S. F.
本文采用电镜技术对产蛋弧菌UKi2株的细胞发育和分裂进行了研究。在腐生和寄生的生长条件下，逗号形状的细胞扩大、拉长并形成螺旋状的花丝。丝状细胞的分裂机制似乎包括细胞质膜对丝状细胞的不对称收缩，并伴随着分裂区域细胞壁外层的破裂。在细胞壁的再生过程中，形成鞭毛和鞭毛鞘。子细胞的鞭毛的发育在新形成的细胞与丝分离之前就开始了。对腐生和寄生条件下生长的B. bacteriovorus UKi2的观察表明，这两种生长方式的发育和超微结构相似。
Some aspects of cell development and division of Bdellovibrio bacteriovorus strain UKi2 were examined by use of electron microscopic techniques. Under saprophytic and parasitic conditions of growth, the comma-shaped cells enlarge, elongate, and form helical filaments. The mechanism of division appears to consist of an asymmetrical constriction of the filamentous cell by the cytoplasmic membrane, accompanied by a breakdown of the outer layers of the cell wall in the division region. During regeneration of the cell wall, the flagellum and flagellar sheath are formed. The development of the flagellum of the daughter cell is initiated prior to separation of the newly formed cells from the filament. Observations of B. bacteriovorus UKi2 grown under saprophytic and parasitic conditions indicate that development and ultrastructure are similar in both modes of growth.