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. 1980 Sep;40(3):516-21.
doi: 10.1128/aem.40.3.516-521.1980.

Organic carbon utilization by resting cells of thiosulfate-oxidizing marine heterotrophs

J H Tuttle  1
Affiliations

Organic carbon utilization by resting cells of thiosulfate-oxidizing marine heterotrophs

J H Tuttle. Appl Environ Microbiol. 1980 Sep.

Abstract

Two thiosulfate-oxidizing marine heterotrophs, strains 12W and 16B, were tested for utilization of [C]glucose and [C]acetate, respectively, in the presence or absence of thiosulfate. Thiosulfate oxidation caused an increase in organic carbon incorporation and a corresponding decrease in respiration at pH 6.5, near the optimum pH for thiosulfate oxidation and thiosulfate-stimulated growth in these bacteria. The amount of glucose or acetate metabolized remained virtually unaffected by thiosulfate oxidation. The metabolic shift in carbon utilization was diminished by increasing the initial pH to 8.0. The results indicate that marine heterotrophs 12W and 16B exhibit a type of mixotrophic metabolism which differs from that observed in the thiobacilli.

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