Flavobacterium sp. TK-70の増殖およびカロチノイド生産に対する可視光線の効果 : 微生物によるカロチノイド生合成に関する研究(第2報)

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Effect of light on production of carotenoids and growth of Flavobacterium sp. TK-70 in ammonium acetate medium was studied. Substrate inhibition of growth was observed, and the maximum specific growth rate, the saturation constant and the inhibition constant of substrate were 0.33 hr^<-1> g/l and 18 g/l respectively. Growth of this strain was inhibited by light according to the following equation : μ_L=μ_D/(1+I^^-/K_I) The inhibition constant of light was 6,000 lux.Production of carotenoids increased proportionally to the light intensity up to 1,600 lux, but decreased above 1,600 lux. Carotenoids synthesis was induced by a short period illumination, but the quantity of carotenoids produced was less than 1/4 of that in continuously illuminated culture. The production of carotenoids dicreased with prolongation of culture time in the dark. Production of carotenoids appears to be associated with growth in illuminated culture.
社団法人日本生物工学会の論文
1977-11-25