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Powdery Mildew Caused by an Erysiphe sp. on Korean Ginseng
Author(s) -
Cho SungEun,
Park MiJeong,
Choi GugSeoun,
Park JiHyun,
Shin HyeonDong
Publication year - 2016
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12419
Subject(s) - powdery mildew , biology , ginseng , mycelium , fungus , botany , internal transcribed spacer , hypha , phylogenetic tree , gene , medicine , alternative medicine , pathology , biochemistry
In August and September 2014, Korean ginseng ( Panax ginseng ) plants showing symptoms of powdery mildew infection were found in a polyethylene film‐covered greenhouse in Suwon, Korea. The mildew was initially observed to occur in circular to irregular white colonies, which subsequently developed into abundant mycelial growths on both leaf surfaces. No chasmothecia were observed. Based on its morphological characteristics, the fungus was determined to be a species of Erysiphe . Phylogenetic analysis of the sequence of the internal transcribed spacer region of the ribosomal DNA obtained from the isolate placed the powdery mildew fungus in the genus Erysiphe . Here, we describe this Erysiphe sp. found growing on Korean ginseng using both illustrations and molecular data. A comparison of the Korean isolate and three previous records of powdery mildews known to grow on Panax plants is also provided. This is the first report of powdery mildew on Korean ginseng in Korea.