Composition and Pathogenicity of Fusarium Crown Rot Pathogens of Wheat in Major Winter Wheat Production Areas of China
Author(s): ZHANG Xiangxiang, SUN Haiyan, LI Wei, DENG Yuanyu, ZHANG Aixiang, YU Hanshou, CHEN Huaigu, Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, Nanjing Agricultural University, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences
Pages: 272-278
Year: 2014 Issue: 2
Journal: Journal of Triticeae Crops
Keyword: Wheat crown rot; Fusarium graminearum; Population structure; Chemotype; Pathogenicity;
Abstract: Wheat crown rot caused by Fusariumspp.has become more prevalent in China in recent years.To understand the structure of the Fusariumspp.in main areas of wheat production of China,wheat basal stems showing crown rot symptoms were collected from Jiangsu,Anhui,Henan,Hebei and Shandong provinces from 2009to 2012.Totally 135isolates were selected to analyze the distribution and chemotype composition in different geographic areas.The analysis showed that 103isolates were F.asiaticumamong 135isolates,which were of 3-acetyldeoxynivalenol(3-AcDON),and nivalenol(NIV)type.Seventeen isolates belonged to F.graminearumspecies,which were all of 15-AcDON type.F.asiaticumspecies with 3-AcDON type was the predominant pathogen causing crown rot in these 5provinces.The pathogenicity of 120 F.asiaticumand F.graminearumisolates to wheatheads and crown was tested.The results suggested that isolates of F.asiaticum were more aggressive toward wheat crown and heads than F.graminearum.The isolates of DON chemotype were more aggressive toward wheat than isolates of NIV chemotype,but there was no significant difference between them.
Pages: 272-278
Year: 2014 Issue: 2
Journal: Journal of Triticeae Crops
Keyword: Wheat crown rot; Fusarium graminearum; Population structure; Chemotype; Pathogenicity;
Abstract: Wheat crown rot caused by Fusariumspp.has become more prevalent in China in recent years.To understand the structure of the Fusariumspp.in main areas of wheat production of China,wheat basal stems showing crown rot symptoms were collected from Jiangsu,Anhui,Henan,Hebei and Shandong provinces from 2009to 2012.Totally 135isolates were selected to analyze the distribution and chemotype composition in different geographic areas.The analysis showed that 103isolates were F.asiaticumamong 135isolates,which were of 3-acetyldeoxynivalenol(3-AcDON),and nivalenol(NIV)type.Seventeen isolates belonged to F.graminearumspecies,which were all of 15-AcDON type.F.asiaticumspecies with 3-AcDON type was the predominant pathogen causing crown rot in these 5provinces.The pathogenicity of 120 F.asiaticumand F.graminearumisolates to wheatheads and crown was tested.The results suggested that isolates of F.asiaticum were more aggressive toward wheat crown and heads than F.graminearum.The isolates of DON chemotype were more aggressive toward wheat than isolates of NIV chemotype,but there was no significant difference between them.
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