1887

Abstract

is an anoxygenic photosynthetic bacterium that is capable of differentiating into several cell types. When grown phototrophically in liquid, cells exhibit a vibrioid shape and have a single polar flagellum. When grown on a solid surface, will differentiate into rod-shaped swarm cells that display numerous lateral flagella. Upon starvation for nutrients, also forms desiccation-resistant cysts. In this study, it was determined that has heat- and desiccation-resistance properties similar to other cyst-forming species. In addition, microscopic analyses of the morphological changes that occur during cyst cell development were performed. It was observed that typically forms multi-celled clusters of cysts that contain from four to more than 10 cells per cluster. It was also determined that cell density has a minor effect on the percentage of cyst cells formed, with cell densities of 10–10 cells per 5 μl spot yielding the highest percentage of cyst cells. The striking similarities between the life cycle of and the life cycle exhibited by spp. are discussed.

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2004-02-01
2019-11-19
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