College of Life Sciences, Yangtze University, Jingzhou, Hubei, 434025, China.
Institute of Plant Protection, Guangxi Academy of Agricultural Sciences and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China.
Plant Dis. 2020 Apr;104(4):1207-1213. doi: 10.1094/PDIS-03-19-0438-RE. Epub 2020 Feb 15.
Mango is an economically important fruit crop in southern China. However, leaf spots restrict the development of mango trees, reducing the yield and production. Pestalotioid fungi are one of the major agents causing leaf spots on mango. During 2016 and 2017, 21 isolates of pestalotioid fungi associated with leaf spots on mango leaves were collected from five provinces in southern China: Guangxi, Hainan, Yunnan, Guangdong, and Fujian. All 21 isolates were subjected to morphological characterization and DNA sequence analysis. The morphological data were combined with analyses of concatenated sequences of the ITS (internal transcribed spacer), TEF 1-α (translation elongation factor), and TUB2 (β-tubulin) for higher resolution of the species identity of these isolates. The results showed that these isolates belong to , , , , , , , and Pathogenicity test results showed that all these species could cause symptoms. On detached mango leaves (cv. Tainong), early foliar symptoms on leaves were small yellow-to-brown lesions. Later, these spots expanded with uneven borders, turned white to gray, and coalesced to form larger gray patches. To our knowledge, this is the first description of , , , , , , or as causal agents for leaf spots on mango worldwide.
芒果是中国南方重要的经济水果作物。然而，叶斑病限制了芒果树的生长，降低了产量和生产。拟盘多毛孢真菌是引起芒果叶斑病的主要病原体之一。2016 年至 2017 年，从中国南方的广西、海南、云南、广东和福建五个省份收集了 21 株与芒果叶斑病相关的拟盘多毛孢真菌分离株。对所有 21 个分离株进行了形态特征和 DNA 序列分析。将形态数据与 ITS（内部转录间隔区）、TEF1-α（翻译延伸因子）和 TUB2（β-微管蛋白）的串联序列分析相结合，以提高这些分离株的物种鉴定分辨率。结果表明，这些分离株属于 、 、 、 、 、 、和 。致病性试验结果表明，所有这些物种都能引起症状。在离体芒果叶片（台农）上，叶片早期的叶部症状为小的黄-棕色病斑。随后，这些斑点扩大，边界不均匀，变白至灰色，并融合形成较大的灰色斑块。据我们所知，这是首次描述 、 、 、 、 、或 作为世界范围内芒果叶斑病的致病因子。
