Neurospora sitophilaのpentoseの同化について(第1報)

概要

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By using synthetic medium containing 1% xylose, 0.1% peptone, 0.3% KNO_8,0.1% KH_2PO4,0.01% MgSO_4. 7H_2O and trace of FeCl_3,and yeast water added with 1% xylose, the xylose assimilation by Neurospora sitophila was examined.1) When this fungus was cultured in the synthetic medium, addition of 1% asparagine brought good effect upon the rate of sugar consumption and pigment production. By culturing for 12 days at 30℃ in the synthetic medium, sugar consumed was 94.47%, The rate of sugar consumption by this fungus in xylose-yeast water was far greater than that in the synthetic medium, and the most of xylose added to the yeast water was consumed within 3 days.2) The weight of fungus grown in 1% xylose-yeast water was larger than that in the synthetic medium, and it increased with sugar concentration, but the ratio of the rate of growth to the supplied sugar decreased. The weight of fungus reached its maximum (41.5% of the supplied sugar) by culturing for 3 days in 1% xylose-yeast water.3) When this fungus was cultured in 1% xylose-yeast water for 7 days, the rate of sugar consumption was maximum (98.47%) at PH 4.7 and the yield of fungus was maximum at PH 6.2〜6.8,so that the yield of fungus was not always proportional to the rate of sugar consumption.4) The yield of fungus and the rate of sugar consumtion were proportional to the "surface-ratio" of the medium.
社団法人日本生物工学会の論文
1951-06-15