Rhizopus属糸状菌に対するカドミウムの影響の消去

概要

論文の詳細を見る
It was previously reported by the authors that Cd(II) an Fe(II) had opposite effects on the production of riboflavin cyclic 2', 5'-monophosphate (FMN') synthesized by a GTP-dependent enzyme of Rhizopus javanicus, on its growth and on its acid production. However, when Cd(II) and Fe(II)were added in equimolar amounts, the effects of Cd(II) were markedly reduced. The most remarkable changes caused by the addition of these ions were observed in the ratio of Cell/A : mycelial weight/FMN' forming activity of mycelia. It was revealed that there was a linear relationship between the ratio of Cell/A and the logarithm of the molar concentration of Cd(II). When 5×10^<-4>M of Cd(II) was added before inoculation, the ratio of Cell/A decreased to 24% of the control value as shown in Table 1. However, the decrease of hte ratio was restrained to the control level by an addition of 10^<-3>M of Fe(II) before, or even 3 days after inoculation. When a medium containing (5×10^<-4>M Fe(II)) was used, the growth-limiting concentration of Cd(II) seemed to be increased by 2-3 times the control value : 3×10^<-2>M.
公益社団法人日本生物工学会の論文
1971-01-25