植物体内のPolyphenol成分と植物病原菌 (II) : 桐葉中に含まれる2, 3のPolyphenol及びその桐炭疽病菌の生育に及ぼす影響

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More than six polyphenols were recognized from the extracts of paulownia-tree leaves by paper-chromatography. As to total quantity of polyphenols obtained colorimetrically after adding alminium nitrite, no definite differences were found between healthy and the anthracnose-Gloeosporium Kawakamii-affected leaves of paulownia-tree. While in the case of ortho-dihydroxyl type of polyphenols, measured after the addition of Arnow's reagent, considerable quantities were obtained from the diseased leaves (Table 1). Chlorogenic acid and rutin were verified to exist in the leaves of paulownia-tree (Table 2. band c). The addition of each of these polyphenols of final concentration of 10^<-3>M. respectively to the synthetic media, significantly promoted the growth of the fungus (Table 3 and 4). Quercetin, the aglucon of rutin, showed also the additive effect on the growth of the fungus. When determined by paperchromatography, quercetin in the culture media was decomposed by the fungus into protocatechuic acid, phloroglucinol, and other unknown ones. While in the case of rutin, no sufficient quantity of phloroglucinol for paperchromatography was obtained, due probably to the quick decomposition or absorption by the fungus (Fig. 2 and 3). To obtain more clear evidence for the growth promoting effect of these flavonoids, culture experiment with synthetic medium, with the addition of each of rutin, quercetin, phloroglucinol, protocatechuic acid, and glucose plus rhamnose, in the final concentration of 10^<-3>M. respectively, was made. The dry weight of the mycelial mat of 5 days culture from the medium containing rutin, quercetin and phloroglucinol respectively was greater than that from others (Table 5). Protocatechuic acid and glucose plus rhamnose did not display any promoting effect. The growth promoting effect of the flavonoids for the fungus was considered at least in part due to the nutritive effect of phloroglucinol decomposed from the flavonoids during the culture of the fungus.
日本植物病理学会の論文
1959-11-25

植物体内のPolyphenol成分と植物病原菌 (II) : 桐葉中に含まれる2, 3のPolyphenol及びその桐炭疽病菌の生育に及ぼす影響

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