海洋性硫酸塩還元細菌に関する研究-V : 海洋性硫酸塩還元細菌の榮養について(その2)

概要

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We have previously shown that the marine sulfate-reducing bacteria required extraordinarily higher concentrations in the carbon (energy) source than in the nitrogen source for their growth. The present study is concerned with the energy sources which are required for the growth of these bacteria. 1) As given in Fig. 1, the activity of these bacteria growing in the medium which was defficient in the energy source was vigorously accerelated by the addition of Ca-lactate (1 g./L.). 2) As shown in Table 1, in the case of the pure culture, the marine sulfate-reducing bacteria could not utilize all of the organic compounds tested (excepting lactate, pyruvate, glycerol, DL-alanine, and formate), as the energy sources for their growth, and in the case of the crude culture, however, these organisms could utilize most kinds of the organic compounds. In the latter case, it is considered that, by the action of coexistent bacteria, a large variety of organic compounds tested were partially transformed into the matters having the chemical natures which could be utilized by the marine sulfate-reducing bacteria. 3) As shown in Table 2, these bacteria could develop by obtaining their energy requirements from the oxidation of molecular hydrogen.