Staley J T, Bont J A, Jonge K
Antonie Van Leeuwenhoek. 1976;42(3):333-42. doi: 10.1007/BF00394132.
Four strains of heterotrophic, fusiform caulobacters have been isolated from freshwater sources. A single prostheca extends from one pole of mature cells, and cells attach to various substrata by means of a holdfast located at the distal tip of the appendage. Thus, superficially these bacteria bear a strong resemblance to bacteria in the genus Caulobacter. However, unlike Caulobacter these bacteria do not exhibit a dimorphic life cycle of motile, non-stalked daughter cells and immotile, stalked mother cells. Instead both mother and daughter cells are immotile, and at the time of cell separation the daughter cells are essentially identical mirror-image replicas of the mother cell. In addition, the prosthecae of these fusiform caulobacters do not have crossbands, they are somewhat wider than the stalks of Caulobacter and the pseudostalks of Asticcacaulis, and they terminate in a bulbous tip. The deoxyribonucleic acid (DNA) base composition ranges from 54.6-60.1, well below the 62-67 range for the genus Caulobacter. Based upon these and other differences a new genus and species, Prosthecobacter fusiformis, is proposed for the fusiform caulobacters.
已从淡水水源中分离出四株异养的、梭形柄杆菌。单个柄从成熟细胞的一极伸出，细胞通过位于附属物远端的固着器附着于各种基质。因此，从表面上看，这些细菌与柄杆菌属的细菌极为相似。然而，与柄杆菌不同的是，这些细菌并不表现出运动性无柄子细胞和不运动有柄母细胞的二态生命周期。相反，母细胞和子细胞均不运动，在细胞分裂时，子细胞基本上是母细胞的镜像复制品。此外，这些梭形柄杆菌的柄没有横纹，它们比柄杆菌的柄和星状柄杆菌的假柄稍宽，并在末端呈球状。脱氧核糖核酸（DNA）的碱基组成范围为54.6 - 60.1，远低于柄杆菌属的62 - 67范围。基于这些及其他差异，为梭形柄杆菌提出了一个新的属和种，即梭形柄杆菌属。
