Identification and Observation of Infection Processes of Colletotrichum Species Associated with Persimmon Anthracnose in Guangxi, China
文献类型： 外文期刊
作者： Zhang, Miaomiao 1 ; Forte-Perri, Vivian 3 ; Sun, Wenxiu 1 ; Tang, Lihua 2 ; Huang, Suiping 2 ; Guo, Tangxun 2 ; Chen, Xiaolin 2 ; Li, Qili 2 ;
作者机构： 1.Yangtze Univ, Coll Life Sci, Jingzhou 434025, Hubei, Peoples R China
2.Guangxi Key Lab Biol Crop Dis & Insect Pests, Inst Plant Protect, Guangxi Acad Agr Sci, Key Lab Green Prevent & Control Fruits & Vegetable, Nanning 530007, Guangxi, Peoples R China
3.Univ Guelph, Sch Environm Sci, Guelph, ON N1G 2W1, Canada
关键词： Colletotrichum; infection processes; morphological characteristics; pathogenicity; persimmon; phylogenetic analysis
期刊名称：PLANT DISEASE （ 影响因子：4.5； 五年影响因子：5.0 ）
ISSN： 0191-2917
年卷期： 2023 年 107 卷 6 期
页码：
收录情况： SCI
摘要： Persimmon originated from China where it has a long cultivation history. Anthracnose fruit rot and leaf blight caused by Colletotrichum species are major diseases of persimmon in China and cause severe economic losses. To determine the species causing anthracnose of persimmon in Guilin, Guangxi Province, diseased samples were collected from the four local counties: Gongcheng, Yangshuo, Pingle, and Lipu. Seventy-five isolates were obtained from persimmon samples with anthracnose symptoms and had similar morphological characteristics. Isolates were identified using a BLAST search and phylogenetic analysis of the internal transcribed spacer region, glyceraldehyde-3-phosphate dehydrogenase, partial actin, beta-tubulin, chitin synthase genomic regions, Apn2-Mat1-2 intergenic spacer, and the partial mating type gene and calmodulin genes. Five species (C. fructicola, C. horii, C. karstii, C. cliviicola, and C. siamense) accounted for 54.7, 25.3, 12.0, 5.3, and 2.7%, respectively, of the total isolates. All five Colletotrichum species were pathogenic on attached leaves and detached fruits of persimmon (cultivar Gongcheng Yueshi) in pathogenicity assays. The infection processes of the five Colletotrichum species were observed on persimmon leaves using light microscopy. Conidia of C. fructicola germinated at 12 h post inoculation (hpi) and quickly formed acervuli at 6 days post inoculation (dpi) and were the most aggressive. By contrast, conidia of C. cliviicola germinated at 3 hpi but produced the acervuli at 8 dpi and were the least aggressive. This is the first description of C. fructicola, C. cliviicola, and C. siamense as causal agents of persimmon anthracnose in Guangxi Province, China.
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