Reevaluation of Chloropseudomonas ethylica Strain 2-K

Gray, Beulah H.; Fowler, Charles F.; Nugent, N. A.; Rigopoulos, N.; Fuller, R. C.

doi:10.1099/00207713-23-3-256

Cited by 49 publications

(19 citation statements)

References 9 publications

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“…It has been suggested that syntrophic interactions occur within consortia and are based on an internal sulfur cycle (Pfennig 1980), analogously to the syntrophic mixed cultures of green sulfur bacteria with sulfur-or sulfate-reducing bacteria (Gray et al 1973;Biebl and Pfennig 1978;Warthmann et al 1992). However, the majority of known sulfur-or sulfate-reducing bacteria belong to the δ-subclass of Proteobacteria.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic affiliation of the bacteria that constitute phototrophic consortia

Fröstl

Overmann

2000

Archives of Microbiology

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The phylogenetic affiliation of epibionts occurring in three morphologically distinct types of green-colored phototrophic consortia was investigated. Intact consortia of the types "Chlorochromatium aggregatum", "C. glebulum", and a third previously undescribed type, tentatively named "C. magnum" were mechanically separated from accompanying bacteria by either micromanipulation or by chemotactic accumulation in sulfide-containing capillaries. A 540-base-pair-long fragment of the 16S rRNA gene of the epibionts was amplified employing PCR primers specific for green sulfur bacteria. DNA fragments were separated by denaturing gradient gel electrophoresis and subsequently sequenced. The results of this phylogenetic analysis indicated that the symbiotic epibionts, together with only a few free-living strains, form a cluster within the green sulfur bacterial radiation which is only distantly related to the majority of known representatives of this phylum. Consortia with identical morphology but different origin exhibited significant differences in their partial 16S rRNA gene sequences, which could be confirmed by analysis of the 16S rRNA secondary structure. The phylogenetic affiliation of the chemotrophic central rod-shaped bacterium of "C. aggregatum" and "C. magnum" was analyzed by fluorescent in situ hybridization. According to our results and contrary to earlier assumptions, the central bacterium is a member of the beta-subgroup of the Proteobacteria.

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Section: Discussionmentioning

confidence: 99%

Phylogenetic affiliation of the bacteria that constitute phototrophic consortia

Fröstl

Overmann

2000

Archives of Microbiology

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“…An incidental case of a mixed culture of a sulfate reducing bacterium and Chlorobium limicola has been found by G r a y et al 15 in the subculture of Chloropseudomonas ethylica, strain 2-K, originally obtained by O 1 s e n in 1961 from the laboratory in Moscow (see ref. 30).…”

Section: Rps Palustris Rps Suljidophilamentioning

confidence: 95%

The phototrophic bacteria and their role in the sulfur cycle

Pfennig¹

1975

Plant Soil

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“…The organism referred to as Chloropseudomonas (C.) ethylica in the older literature has now been recognized to be a syntrophic mixture of a sulfur oxidizing green bacterium and a sulfate reducing colorless bacterium [31,96]. The green bacterium has been identified as Chlorobium limicola in some strains and Prosthecochloris aestuarii in others [96].…”

Section: Nomenclaturementioning

confidence: 99%

Electron transport in green photosynthetic bacteria

Blankenship

1985

Photosynth Res

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Green bacteria make up two of the four families of anoxygenic photosynthetic prokaryotes. The two families have similar pigment compositions and membrane fine structure, and both contain a specialized antenna structure known as a chlorosome. The primary photochemistry and electron transport pathways of the two groups are, however, quite distinct. The anaerobic green bacteria (Chlorobiaceae) contain low-potential iron-sulfur proteins as early electron acceptors and can directly reduce NAD(+) in a manner reminiscent of Photosystem I of oxygenic organisms. The facultatively aerobic green bacteria (Chloroflexaceae) contain quinone-type acceptors and have an overall pattern of electron transport very similar to that found in purple bacteria. Many aspects of energy storage in green bacteria, especially photophosphorylation and the role of cytochrome b/c complexes in electron transport, remain poorly understood.

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Reevaluation of Chloropseudomonas ethylica Strain 2-K

Cited by 49 publications

References 9 publications

Phylogenetic affiliation of the bacteria that constitute phototrophic consortia

Phylogenetic affiliation of the bacteria that constitute phototrophic consortia

The phototrophic bacteria and their role in the sulfur cycle

Electron transport in green photosynthetic bacteria

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