高温性繊維素醗酵菌の Growth factor に就て : 繊維質の醗酵化學的研究 (第11報)

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The fact that the most favourable growth and fermentation take place in the "medium 2" or the "medium 6" has already been reported by us. In the present paper, the additional studies on the two media have been continued, and as a result, it has been found that the thermophile bacterium stuided by us also requires some substances necessary for growth.In order to find out and to identify the essential substances, experiments were made on various exztracts obtained from natural materials and on various known vitamins and growth factors. It has been shown clearly that hesperidin as well as some organic matter contained in the extract of buckwheat (Fagopyrum vulgare HILL) is a necessary growth-factor for the organism.From the results of the experiments on the fractions wich were obtained by various treatments from buckwheat extract, it has been concluded that a growth factor for the organism is rutin.And then, in further studies, we have recognized that the essential growth factor required by the organism is the so-called vitamin P, and have presumed that flavonoids bearing close resemblance in constitution to this substance also exert a stimulating effect on the cellulolytic activity.The addition of 1 : 10^10 rutin, 1 : 10^12 hasperidin or 1 : 10^5 buckwheat extract to the "medium 2" has produced the normal growth and fermentation vigorously.
公益社団法人日本生物工学会の論文
1954-06-15