稲胡麻葉枯病菌分生胞子の発芽に於ける呼吸型式

概要

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The conidia of Cochliobolus miyabeanus from 8-10 months old culture, having lower germinability, were suspended in buffer solution and tested for germination as effected by addition of carbohydrates. The percentage of germination was increased by glucose, acetate, pyruvate, succinate, fumarate and ethanol but not by citrate. A linear regression was found between the concentration of the former sub-strates and the rate of increase of spore germination. It is issumed that those substrates, except for citrate, may be utilized by germinating conidia as good as glucose, because no significant difference in regression coefficient was found from glucose. Therefore, the conidia seem to respire during their germination through C_4-di-carboxylic acid cycle. When citrate was given together with a small amount of glucose as an energy source, percentage of germination in conidia was increased, and if streptomycin or monofluoro acetate, was supplied in addition, the increase of germinability was inhibited. From this data, the mechanism of oxydation in respiration of the germinating conidia is postulated to follow TCA cycle. Germination of the conidia was inhibited by CO-gas, and the inhibitory effect of CO-gas was protected by illumination. It suggests that the terminal oxydase of the conidia during germination may be related to cytochrome oxydase.
日本植物病理学会の論文
1957-06-30