東京大学大学院農学生命科学研究科生物材料科学専攻
Department of Biomaterial Scienecs, Graduate School of Agricultural and Life Sciences, The University of Tokyo
東京大学大学院農学生命科学研究科附属演習林樹芸研究所
Arboricultural Research Institute, University Forests, Graduate School of Agricultural and Life Sciences, The University of Tokyo
抄録
Eucalyptus saligna is a fast-growing tree and is expected to be used as a raw material in Japan in the future. We examined the use of gallic acids, one of the ingredients of the E. saligna leaves, in order to explore the possibility of the utilization of waste leaves. Using the aqueous extract of E. saligna leaves, gallic acid (GA) and methyl gallate (MG), we investigated the antibacterial spectrum against the damping-off fungi Fusarium oxysporum, Fusarium solani, Rhizoctonia solani, Pythium sylvaticum, Pythium ultimum, rice blast causative fungus Magnaporthe oryzae, and dark snow-blight fungi. Aqueous extracts in which most of the GA and MG are present as glycosides showed some antifungal activity against Pythium spp., but showed little antifungal activity against other fungi. GA completely inhibited the growth of M. oryzae and P. sylvaticum at 2000 ppm and MG completely suppressed the growth of P. sylvaticum and P. ultimum at 800 ppm. We concluded that in order to utilize the extract of E. saligna leaves for antifungal purposes, it is appropriate to use them after hydrolysis treatment. Furthermore, a germination test was carried out on Picea jezoensis and Picea glehnii, the spruces usually attacked by fungi causing blight and dark snow-blight diseases. Since the effects of GA on the germination and growth of plants were hardly observed, it is expected that GAs can actually be of use as an antibacterial agent.
内容記述
論文
雑誌名
東京大学農学部演習林報告 = Bulletin of The University of Tokyo Forests
Eucalyptus saligna 葉の主成分である没食子酸類の活用に向けた抗菌スペクトルの検討
esrh137003.pdf
(638.17KB)
