Epicoccum spp. Causing Maize Leaf Spot in Heilongjiang Province, China

文献类型： 外文期刊

第一作者： Xu, Xi

作者： Xu, Xi;Li, Jingjing;Yang, Xilang;Zhang, Li;Wang, Shuo;Shen, Guijin;Hui, Bing;Xiao, Jialei;Zhou, Changjian;Wang, Xiangjing;Zhao, Junwei;Xiang, Wensheng;Xu, Xi;Li, Jingjing;Xiang, Wensheng

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关键词： Epicoccum spp; maize; maize leaf spot; multi-locus sequence analysis; pathogenicity

期刊名称：PLANT DISEASE （ 影响因子：4.614； 五年影响因子：5.33 ）

ISSN： 0191-2917

年卷期： 2022 年 106 卷 12 期

页码：

收录情况： SCI

摘要： Maize leaf spot occurs worldwide and affects maize production. Maize can be infected by several pathogens causing leaf spot, such as Bipolaris zeicola, Bipolaris maydis, Curvularia species, Alternaria species, etc. In the current study, 30 Epicoccum isolates recovered from symptomatic maize leaves were identified based on morphological characteristics, pathogenicity, and multilocus sequence analyses of nuLSU, ITS, tub2, and rpb2. These maize isolates were grouped into five Epicoccum species, including E. nigrum, E. layuense, E. sorghinum, E. latusicollum, and E. pneumoniae. Pathogenicity tests showed that all five Epicoccum species could produce small ellipse- and spindle-shaped spots on maize leaves. The lesion center was grayish yellow to dark gray and surrounded by a chlorotic area. Furthermore, the Epicoccum isolates exhibited high pathogenicity to 20 main maize varieties of Heilongjiang Province but showed different sensitivities to the commonly used fungicides carbendazim and tebuconazole. In addition, these Epicoccum isolates showed different production capacity of pectinase, cellulase, protease, amylase, laccase, and gelatinase, but all showed high lipase activity. This is the first report globally of E. layuense, E. latusicollum, and E. pneumoniae as causal agents of maize leaf spot. E. pneumoniae was first reported as a plant pathogen.

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