Abstract
1. Nine strains of Desulfovibrio, representing 4 species, grew by dismutation of malate in “sulphate-free” medium; succinate, fumarate and acetate were end-products of growth. 2. Two strains of D. vulgaris could only grow in malate medium in presence of sulphate as terminal electron acceptor. 3. Two dismuting strains of D. desulfuricans and two non-dismuting strains of D. vulgaris, all grown in a lactate medium, showed fumarase activity of the same order of magnitude. 4. The two dismuting strains showed high succinate dehydrogenase activity when grown in lactate medium; one of the non-dismuting strains (Woolwich) exhibited very low activity, while in the other non-dismuter (Hildenborough) the presence of succinate dehydrogenase was not conclusively proved.
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