Aspergillus terreus K26による糖蜜のイタコン酸醗酵における有機酸および金属イオンの影響

概要

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Effects of some organic acids and metal ions in cane blackstrap molasses on itaconic acid fermentation with Aspergillus terreus K 26 were investigated.Formic and acetic acids inhibited the growth of A. terreus at comparatively high concentrations. At low concentrations, however, they promoted growth. The presnece of trans-aconitic acids in the culture medium caused a marked increase in the total growth, with a subsequent decrease in the acid-forming activity of the grown mycelia, and in the acid yield. Other non-volatile acids were not responsible for the decrease in itaconic acid yield at the concentrations which are usually found in untreated molasses.The decrease in itaconic acid yield was alos found in the presence of potassium ion at concentrations higher than 10.14 g/l. None but the potassium ion had an effect on acid productivity of the mycelia, even when added to the culture medium in the amounts corresponding to those found in molasses.
社団法人日本生物工学会の論文
1975-07-25