Survey and examination of the potential alternative hosts of Villosiclava virens, the pathogen of rice false smut, in China  

作　　者：DENG Qi-de YONG Ming-li LI Dan-yang LAI Chao-hui CHEN Hong-ming FAN Jing HU Dong-wei 

机构地区：[1]The State Key Laboratory of Rice Biology, Biotechnology Institute, Zhejiang University [2]Plant Protection Station of Xiangshan County [3]Rice Research Institute, Sichuan Agricultural University

出　　处：《Journal of Integrative Agriculture》2015年第7期1332-1337,共6页农业科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (31271999);the Special Fund for Agro-Scientific Research in the Public Interest, China (200903039-5)

摘　　要：Rice false smut is caused by ascomycete Villosiclava virens, whose potential alternative hosts have been assumed previ- ously. Here its potential alternative hosts were surveyed and identified from 2008 to 2013 in the main rice-growing regions in China. Two common weeds in paddy fields, Digitaria sanguinalis Scop. and Echinochloa crusgalli （L.） Beauv., were found to present the similar symptoms to smut diseases in a few individuals in 2012 and 2013 in Zhejiang and Sichuan provinces of China, respectively. After the examinations of the spore morphology, their infection and extension mode in hosts, pathogen cell wall components, and molecular identification, the two pathogens were identified to be the Basidiomycetes, Ustilago syntherismae and Ustilago trichophora, respectively. So far there has been no alternative host of V. virens to be identified in China. These suggest that the alternative hosts of V. virens, if they do exist, are not possible to play an important role in the pathogen life cycle and the disease epidemics.Rice false smut is caused by ascomycete Villosiclava virens, whose potential alternative hosts have been assumed previ- ously. Here its potential alternative hosts were surveyed and identified from 2008 to 2013 in the main rice-growing regions in China. Two common weeds in paddy fields, Digitaria sanguinalis Scop. and Echinochloa crusgalli （L.） Beauv., were found to present the similar symptoms to smut diseases in a few individuals in 2012 and 2013 in Zhejiang and Sichuan provinces of China, respectively. After the examinations of the spore morphology, their infection and extension mode in hosts, pathogen cell wall components, and molecular identification, the two pathogens were identified to be the Basidiomycetes, Ustilago syntherismae and Ustilago trichophora, respectively. So far there has been no alternative host of V. virens to be identified in China. These suggest that the alternative hosts of V. virens, if they do exist, are not possible to play an important role in the pathogen life cycle and the disease epidemics.

关 键 词：alternative host Villosiclava virens Digitaria sanguinalis Scop. Echinochloa crusgalli （L.） Beauv. Ustilagospp. rice false smut 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治] S816.53[农业科学—植物保护]