Details

Autor(en) / Beteiligte

• XU Liang, WANG Xiao-han, LUO Rui-ya, LU Shi-qiong, GUO Ze-jian, WANG Ming-an, LIU Yang, ZHOU Li-gang (National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China)

Titel

Secondary metabolites of rice sheath blight pathogen Rhizoctonia solani Kuhn and their biological activities

Ist Teil von

• Journal of Integrative Agriculture, 2015, Vol.14 (1), p.80-87

Ort / Verlag

Science Press

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Eight compounds were isolated from the fermentation cultures of rice sheath blight pathogen Rhizoctonia solani Kuhn. They were identified as ergosterol （1）, 6β-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） andβ-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.