Identification of Colletotrichum siamense causing litchi pepper spot disease in mainland China
文献类型： 外文期刊
第一作者： Ling, J. F.
作者： Ling, J. F.;Xi, P. G.;Jiang, Z. D.;Zhang, L. H.;Ling, J. F.;Xi, P. G.;Jiang, Z. D.;Zhang, L. H.;Ling, J. F.;Song, X. B.;Cheng, B. P.;Cui, Y. P.;Chen, X.;Peng, A. T.;Ling, J. F.;Song, X. B.;Cheng, B. P.;Cui, Y. P.;Chen, X.;Peng, A. T.
作者机构：
关键词： Colletotrichum siamense; litchi pepper spot disease; morphological identification; pathogenicity test; phylogenetic analysis
期刊名称：PLANT PATHOLOGY （ 影响因子：2.59； 五年影响因子：2.924 ）
ISSN： 0032-0862
年卷期： 2019 年 68 卷 8 期
页码：
收录情况： SCI
摘要： Litchi (Litchi chinensis) pepper spot disease results in black spotting symptoms on litchi fruits. This disease was first observed on litchi cultivar Guiwei, in Guangzhou, China, in 2009, and then found widespread in other litchi-growing regions of China. Colletotrichum isolates were consistently recovered from typical black spot lesions of diseased fruits with frequency ranging from 83% to 100%. Three representative Colletotrichum isolates from Maoming, Guangzhou and Shenzhen were selected for identification and pathogenicity testing in the field. Based on morphology and phylogenetic analysis using the ribosomal internal transcribed spacer region (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), calmodulin (CAL), actin (ACT), beta-tubulin (TUB2) and glutamine synthetase (GS) gene sequences, the three isolates were identified as C. siamense. In the pathogenicity experiments, typical symptoms appeared on the inoculated litchi fruits, including black spots and green patches around these black spots. These symptoms were consistent with the symptoms originally observed in the field. Colletotrichum siamense was successfully reisolated from the typical black spot lesions of the inoculated litchi fruits. To the authors' knowledge, this is the first report on characterization of C. siamense as the causal agent of litchi pepper spot disease in mainland China by successful inoculation on fruits under field conditions.
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