Effect of Toxins Isolated from Exserohilum monoceras (Drechsler) Leonard and Suggs on Echinochloa crus-galli (L.) Beauv.  

作　　者：CHEN Yong ZHENG Wei WANG Li-ming CUI Hai-lan LI Guo-xi LIUXin-gui HAN Cheng-chou ZENG Ren-sen 

机构地区：[1]Weed Science Laboratory, College of Agriculture, South China Agricultural University, Guangzhou 510642, P.R.China [2]Department of Weed and Rodent Biology and Management, Institute of Plant Protection, Chinese Academy of Agricultural Seienees,Beijing 100193, P.R.China

出　　处：《Agricultural Sciences in China》2009年第8期972-978,共7页中国农业科学（英文版）

基　　金：the National Natural Science Foundation of China(30671381,30671381);Guangdong Provincial Natural Science Foundation of China(06300411)for the financial supports

摘　　要：Exserohilum monoceras （Drechsler） Leonard and Suggs is a potential biocontrol agent for the control of Echinochloa species. This fungus causes leaf blight in Echinochloa species, but does not damage rice. Phytotoxicity of the fungal fermented broth was evaluated through the bioassay and the active ingredients were preliminarily isolated by using silica gel column chromatography （CC） in this study. The most active fraction 5-Ⅲ was obtained and analyzed by gas chromatography-mass spectrometry （GC-MS）. The results show that 5-Ⅲ consisted of many compounds, in which 36 compounds accounted for 94.24% of total peak area. Di-n-butyl phthalate （DBP） displayed the highest activity accounted for 9.24% of the total peak area, suggesting that DBP may be one of the main active compounds produced by E. monoceras.Exserohilum monoceras （Drechsler） Leonard and Suggs is a potential biocontrol agent for the control of Echinochloa species. This fungus causes leaf blight in Echinochloa species, but does not damage rice. Phytotoxicity of the fungal fermented broth was evaluated through the bioassay and the active ingredients were preliminarily isolated by using silica gel column chromatography （CC） in this study. The most active fraction 5-Ⅲ was obtained and analyzed by gas chromatography-mass spectrometry （GC-MS）. The results show that 5-Ⅲ consisted of many compounds, in which 36 compounds accounted for 94.24% of total peak area. Di-n-butyl phthalate （DBP） displayed the highest activity accounted for 9.24% of the total peak area, suggesting that DBP may be one of the main active compounds produced by E. monoceras.

关 键 词：Exserohilum monoceras PHYTOTOXIN active ingredients Echinochloa crus-galli 

分 类 号：S-03[农业科学]