Identification and Characterization of Colletotrichum Species Associated with Maize in Sichuan, China
文献类型： 外文期刊
第一作者： Yang, Rui
作者： Yang, Rui;Li, Ying;Zhao, Henan;Chen, Wen;Li, Pan;Li, Xuehu;Wu, Cuiping;Ma, Miaomiao;Gong, Guoshu;Sun, Xiaofang
作者机构：
关键词：
maize anthracnose;
期刊名称：JOURNAL OF FUNGI （ 影响因子：4.0； 五年影响因子：4.5 ）
ISSN：
年卷期： 2024 年 10 卷 11 期
页码：
收录情况： SCI
摘要： Colletotrichum species are the most common cause of maize anthracnose, which often manifests as leaf spots. However, field observations often reveal symptoms similar to those caused by other leaf spot pathogens, such as Curvularia and Bipolaris. In this study, 99 isolates were identified using tissue separation and single-spore isolation techniques. As preliminary measures of species diversity, all 99 isolates were identified morphologically, and the glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene sequences were phylogenetically analyzed. Furthermore, 48 representative strains were selected for molecular identification using multi-locus phylogenetic analyses based on five gene loci (ITS, TUB, ACT, GAPDH, and CAL). Finally, 10 species of Colletotrichum isolated from maize leaf spots were identified. Colletotrichum cliviicola was the most dominant species (24.2%), followed by C. fructicola (18.2%), C. karstii (16.1%), C. siamense (13.1%), C. boninense (7.1%), C. kahawae (7.1%), C. brevisporum (6.1%), C. truncatum (5.1%), C. gigasporum (2.0%), and C. gloeosporioides (1.0%). For the first time, pathogenicity tests revealed that C. cliviicola, C. fructicola, C. siamense, C. karstii, and C. truncatum are the causative agents of maize anthracnose. Additionally, C. boninense was identified as an endophytic fungus on healthy maize. In conclusion, this study is the first to identify the pathogen of maize anthracnose in Sichuan Province. It provides valuable insights for accurately diagnosing and managing maize anthracnose.
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