期刊
MYCOBIOLOGY
卷 49, 期 2, 页码 188-195出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/12298093.2021.1880310
关键词
cox2 mtDNA; downy mildew; phylogenetic analysis; Pseudoperonospora humuli
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning, Republic of Korea [2019R1C1C1002791]
- National Research Foundation of Korea [2019R1C1C1002791] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Pseudoperonospora cubensis was found causing downy mildew on oriental pickling melon in Korea for the first time, with two distinct phylogenetic clades detected. Urgent phytosanitary measures, including rapid diagnosis and effective control management, are required due to high incidence and susceptibility.
The genus Pseudoperonospora, an obligate biotrophic group of Oomycota, causes the most destructive foliar downy mildew disease on many economically important crops and wild plants. A previously unreported disease by Pseudoperonospora was found on oriental pickling melon (Cucumis melo var. conomon) in Korea, which is a minor crop cultivated in the temperate climate zone of East Asia, including China, Korea, and Japan. Based on molecular phylogenetic and morphological analyses, the causal agent was identified as Pseudoperonospora cubensis, and its pathogenicity has been proven. Importantly, two phylogenetic clades of P. cubensis, harboring probably two distinct species, were detected within the same plots, suggesting simultaneous coexistence of the two clades. This is the first report of P. cubensis causing downy mildew on oriental pickling melon in Korea, and the confirmation of presence of two phylogenetic clades of this pathogen in Korea. Given the high incidence of P. cubensis and high susceptibility of oriental pickling melon to this disease, phytosanitary measures, including rapid diagnosis and effective control management, are urgently required.
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