Phylogenetic affinity of a wide, vacuolate, nitrate-accumulating Beggiatoa sp. from Monterey Canyon, California, with Thioploca spp.

ABSTRACT: Environmentally dominant members of the genus Beggiatoa and Thioploca spp. are united by unique morphological and physiological adaptations (S. C. McHatton, J. P. Barry, H. W. Jannasch, and D. C. Nelson, Appl. Environ. Microbiol. 62:954-958, 1996). These adaptations include the presence of very wide filaments (width, 12 to 160 microm), the presence of a central vacuole comprising roughly 80% of the cellular biovolume, and the capacity to internally concentrate nitrate at levels ranging from 150 to 500 mM. Until recently, the genera Beggiatoa and Thioploca were recognized and differentiated on the basis of morphology alone; they were distinguished by the fact that numerous Thioploca filaments are contained within a common polysaccharide sheath, while Beggiatoa filaments occur singly. Vacuol

SUBMITTER: Ahmad A 

PROVIDER: S-EPMC91012 | biostudies-literature | 1999 Jan

REPOSITORIES: biostudies-literature