科研之友
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摘要
Laboratory bioassays were carried out to evaluate the antifungal potential of methanolic leaf extracts of three allelopathic trees, namely Melia azedarach L., Mangiferea indica L. and Syzygium cumini (L.) Skeels, against Sclerotium rolfsii Sacc., a soil-borne fungal pathogen that causes diseases in more than 500 plant species. Different concentrations of methanolic leaf extracts ranging from 1 to 5% were tested against in vitro growth of the fungus using malt extract broth as a growth medium. It was found that fungal biomass was significantly decreased by 36 - 54% due to the effect of different concentration of M. azedarach extract. The effect of methanolic leaf extracts of M. indica and S. cumini were generally insignificant. Methanolic leaf extract of M. azedarach was subjected to GC-MS analysis and nine compounds namely phytol (36.041%); 9,12,15-octadecatrienoic acid, methyl ester, (Z, Z, Z)-(34.78%); hexadecanoic acid, methyl ester (12.307%); cyclopropaneoctanoic acid, 2-[2-[(ethylcyclopropyl) methyl] cyclopropyl] methyl-, methyl ester (2.771%); vitamin E (2.677%); 7-methyl-Z-tetradecen-1-ol acetate (2.481%); hexanedioic acid, dimethyl ester (2.284%) and hexanedioic acid, dimethyl ester (1.336%); 2-heptanol (0.577%) were identified.
- 出版日期2017-9
