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Title: Respiration and physiological state in marine bacteria
Authors: Christensen, J. P.
Owens, T. G.
Devol, A. H.
Packard, T. T. 
UNESCO Clasification: 251001 Oceanografía biológica
2414 Microbiología
Keywords: Bacteria, marine
Issue Date: 1980
Publisher: 0025-3162
Journal: Marine Biology 
Abstract: The relationship between oxygen consumption (R) and respiratory electron-transport-system (ETS) activity was investigated in batch cultures of 5 species of marine bacteria, Vibrio adaptatus, V. anguillarum, a partially identified Vibrio sp. SA774, Serratia marinorubra, and Pseudomonas perfectomarinus. Although cellular levels of R and ETS varied widely among the species tested, the R:ETS ratios for growing or senescent populations were relatively constant among the species; these ratios were 5.02 in growth and 0.426 in senescence, with coefficients of variation of 29 and 20%, respectively. The lower senescent-phase R:ETS ratio was due to a depression of the respiration rates following growth termination. The regression log (R per cell) = 0.832 log (ETS per cell) + 0.727 for the growing populations was similar to that determined for marine zooplankton. The slight dependency of the R:ETS ratio on organism dry weight found for zooplankton was supported by our data. Planktonic respiration rates estimated from measured ETS-depth profiles in the eastern tropical North Pacific Ocean using the senescent-phase R:ETS ratio were similar to published oxygen consumption rates in the deep sea.
ISSN: 0025-3162
DOI: 10.1007/BF00393779
Source: Marine Biology [ISSN 0025-3162], v. 55, p. 267-276
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