M. Sudsanguan, R. Shivas, Y. Tan, C. Doungsa-ard, Khonesavane Chittarath, Chhun Hy Heng, Sarunya Nalumpang
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引用次数: 0
摘要
Peronosclerospora 菌种会在全球范围内引起玉米（玉米）霜霉病。在 2018 年至 2022 年期间的调查中，从柬埔寨、老挝人民民主共和国和泰国的田间作物中收集了具有霜霉病症状的玉米叶片。通过显微镜观察叶片组织中是否存在分生孢子和/或卵孢子，初步确定标本上是否存在霜霉病。细胞色素 c 氧化酶亚单位 II（cox2）基因序列的系统发育分析表明，所有标本均为 Peronosclerospora neglecta。泰国的参考标本保存在泰国曼谷的泰国植物病理学标本馆，柬埔寨和老挝人民民主共和国的参考标本保存在澳大利亚昆士兰植物病理学标本馆。在调查期间，Peronosclerospora neglecta 在柬埔寨、老挝和泰国的玉米田间作物中广泛传播。这是柬埔寨和老挝人民民主共和国首次报告 P. neglecta。
Maize Downy Mildew (Peronosclerospora neglecta) in Cambodia, Lao PDR, and Thailand
Peronosclerospora species cause downy mildew diseases on maize (Zea mays) worldwide. Maize leaves with symptoms of downy mildew were collected from field crops in Cambodia, Lao PDR, and Thailand, during surveys between 2018 and 2022. Initial determination of the presence of downy mildew on specimens was determined microscopically by the presence of conidiophores and/or oospores in leaf tissue. Phylogenetic analyses of the cytochrome c oxidase subunit II (cox2) gene sequences showed that all specimens were Peronosclerospora neglecta. Reference specimens from Thailand were deposited at the Thai Plant Pathology Herbarium, Bangkok, Thailand, while those from Cambodia and Lao PDR were deposited at the Queensland Plant Pathology Herbarium, Australia. Peronosclerospora neglecta was widespread in field crops of maize in Cambodia, Lao PDR, and Thailand during the survey period. This is the first time that P. neglecta has been reported in Cambodia and Lao PDR.
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