Leaf blight of sunflower caused by Alternaria tenuissima and A. alternata in Beijing, China
文献类型： 外文期刊
作者： Wang, Taiyun 1 ; Zhao, Juan 1 ; Ma, Guoping 1 ; Bao, Shuwen 1 ; Wu, Xuehong 1 ;
作者机构： 1.China Agr Univ, Dept Plant Pathol, Beijing 100193, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 100097, Peoples R China
关键词： Alternaria; histone 3 gene; leaf blight; morphological traits; sunflower
期刊名称：CANADIAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：2.442； 五年影响因子：1.993 ）
ISSN： 0706-0661
年卷期：
页码：
收录情况： SCI
摘要： Leaf blight of sunflower caused by Alternaria spp. occurs frequently in the Beijing municipality of China. A total of 482 Alternaria isolates were obtained from sunflower leaves with typical dark fleck symptoms sampled from 13 different districts in the Beijing municipality in 2014. Morphological observations and sequence analyses of the rDNA-ITS region and the histone 3 gene revealed that two Alternaria species, A. tenuissima (86.5% frequency) and A. alternata (13.5% frequency), were associated with the disease. Four isolates of A. tenuissima and six of A. alternata were pathogenic to sunflower leaves with disease incidence and disease index ranging from 50-100% and 16.7-33%, respectively. This is the first comprehensive examination of the involvement of Alternaria species in leaf blight of sunflower of Beijing, China.
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