|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
|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.||URI:||http://hdl.handle.net/10553/50887||ISSN:||0025-3162||DOI:||10.1007/BF00393779||Source:||Marine Biology [ISSN 0025-3162], v. 55, p. 267-276|
|Appears in Collections:||Artículos|
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