ビタミンB_6を中心とする乳酸菌の菌栄養学的研究 : (I)ビタミン制限アラニン欠除合成培地におけるビタミンB_6およびアラニンの増殖効果

概要

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Growth of Lactobacillus arabinosus, Lactobacillus casei, Streptococcus faecalis, and Leuconostoc mesenteroides were investigated using alanine-free synthetic media containing essential vitamins. These four lactobacilli required vitamin B_6 for their growths. So the growth promoting effects of pyridoxal, pyridoxamine and pyridoxine were compared. In the absence of vitamin B_6,alanines had varying effects on the growth. Any form of alanines had no effect for L. casei and a little effect for L. arabinosus. DL-Alanine promoted the growth of Stc. faecalis sufficiently but either D- or L-alanine remained ineffective. For Leuc. mesenteroides alanines were moderately effective. On the other hand, D-alanine exhibited inhibitory effect on the growth of L. casei in a semisynthetic medium. From these experimental results, it can be said that for the studies of anti-vitamin B_6 activities of various compounds, the alanine-free synthetic media are more preferable to the semisynthetic media.
日本ビタミン学会の論文
1963-11-25