Rhodopseudomonas sp.の生育ならびにグルタミン合成酵素に及ぼすグルタミン酸, エタノール, n-プロパノール, リンゴ酸の影響

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When Rhodopseudomonas sp. no. 7 was incubated in a salt medium containing ethanol or n-propanol as an electron donor and a carbon source under anaerobic conditions with light, its growth rate was higher in the presence of NH_4^+ than glutamate as a nitrogen source. In contrast, the growth in a malate medium was favorable when glutamate was used as a nitrogen source. The bacterium showed no diauxic growth in the salt medium containing both alcohol and malate, and consumed these substrates simultaneously. In the mixed substrate medium, it grew at a greater rate than in the single substrate medium. The activity of glutamine synthetase of cells grown on alcohols was about 3 to 10 times higher than that of cells grown on malate. This difference became greater when glutamate was used as a nitrogen source. On the other hand, the activity of glutamate synthase was almost the same regardless of culture conditions. No activity of glutamate dehydrogenase was detected in the bacterium.
社団法人日本生物工学会の論文
1986-03-25