Use of reduced sulfur compounds by Beggiatoa spp.: enzymology and physiology of marine and freshwater strains in homogeneous and gradient cultures
Article Abstract:
A study was conducted on the physiology and enzymology of marine and freshwater Beggiatoa strains in gradient and homogeneous cultures. Strains MS-81-6 and MS-81-1c were identified as filamentous, gliding, colorless sulfur bacteria. Results reveal that MS-81-1c is capable of oxidizing sulfite through a sulfite:acceptor oxidoreductase or an adenosine phosphosulfate pathway (APS). Strain MS-81-6, however, posses only sufficient sulfite-acceptor oxidoreductase activity and did not exhibit any APS pathway enzyme activity.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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High nitrate concentrations in vacuolate, autotrophic marine Beggiatoa spp
Article Abstract:
A study was conducted on the nitrate content and autotrophic potential of vacuolate cells of a large Beggiatoa species found at a Monterey Canyon cold seep and at Guaymas Basin hydrothermal vents. All vacuolate, filamentous sulfur bacteria examined were found to be capable of concentrating nitrate from ambient levels by at least 3,000 times. Data also indicated that the Beggiatoa species can reduce nitrate coupled to electron flow via an electron transport system.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Organic carbon utilization by obligately and facultatively autotrophic Beggiatao strains in homogeneous and gradient cultures
Article Abstract:
A study was conducted on the nutritional versatilities of the marine Beggiotoa strains MS-81-6 and MS-81-1c. The filamentous gliding bacteria were bulk-cultivated in a defined liquid medium. Data suggest that the strains differ in their ability to use organic compounds as anabolic and catabolic substrates for growth. Strain MS-81-1c was found to be an obligate chemolithoautotroph while strain MS-81-6 was found to be a versatile facultative chemolithoautotroph.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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