期刊
JOURNAL OF INTEGRATIVE AGRICULTURE
卷 14, 期 1, 页码 80-87出版社
ELSEVIER SCI LTD
DOI: 10.1016/S2095-3119(14)60905-9
关键词
rice sheath blight; Rhizoctonia solani Kuhn; secondary metabolites; bioactivities; in vitro phytotoxic activity
资金
- National Basic Research Program of China [2013GB127800]
- National Natural Science Foundation of China [31271996]
Eight compounds were isolated from the fermentation cultures of rice sheath blight pathogen Rhizoctonia solani Kuhn. They were identified as ergosterol (1), 6 beta-hydroxysitostenone (2), sitostenone (3), m-hydroxyphenylacetic acid (4), methyl m-hydroxyphenylacetate (5), m-hydroxymethylphenyl pentanoate (6), (Z)-3-methylpent-2-en-1,5-dioic acid (7) and 3-methoxyfuran-2-carboxylic acid (8) by means of physicochemical and spectroscopic analysis. Among them, 2, 3, 5-8 were isolated from R. solani for the first time. All the compounds were evaluated for their biological activities. 4-6 and 8 showed their inhibitory activities on the radical and germ elongation of rice seeds. 1, 4 and 7 showed moderate antibacterial activity to some bacteria. 4, 7 and 8 exhibited weak inhibitory activities on spore germination of Magnaporthe oryzae. 8 showed moderate antioxidant activity with the 1,1-diphenyl-2-picryhydrazyl (DPPH) and beta-carotene-linoleic acid assays. This is the first time to reveal compounds 5, 6 and 8 from rice sheath blight pathogen R. solani to have in vitro phytotoxic activity.
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