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http://dx.doi.org/10.5423/RPD.2018.24.4.332

First Report of Bacterial Root Rot Caused by Serratia plymuthica on Panax ginseng  

Jung, Won Kwon (Punggi Ginseng Research Institute, Gyeongsangbuk-do Agricultural Reseach & Extension Services)
Kim, Young Soo (Department of Plant Medicals, Andong National University)
Choi, Jin Kook (Punggi Ginseng Research Institute, Gyeongsangbuk-do Agricultural Reseach & Extension Services)
Kim, Seung-Han (Punggi Ginseng Research Institute, Gyeongsangbuk-do Agricultural Reseach & Extension Services)
Jang, Myeong-Hwan (Punggi Ginseng Research Institute, Gyeongsangbuk-do Agricultural Reseach & Extension Services)
Kwon, Tae Lyong (Punggi Ginseng Research Institute, Gyeongsangbuk-do Agricultural Reseach & Extension Services)
Jeon, Yongho (Department of Plant Medicals, Andong National University)
Publication Information
Research in Plant Disease / v.24, no.4, 2018 , pp. 332-338 More about this Journal
Abstract
In August of 2011, a wilting disease of ginseng was observed at Bongwha, Gyeongbuk province, Korea. Affected plants initially show withering symptoms on leaves of ginseng. As the disease progresses, withering leaves spread downward, eventually encompassing the whole plant. Leaves lose vigor but remain pale green. Symptoms of roots were brown, and soft rots characterized by moist and watery decay of the whole ginseng root, which initiated as small brown, water-soaked lesions of hairy roots and enlarged to the entire roots. The causal organism isolated from the infected roots was identified as Serratia plymuthica based on its physiological and biochemical characteristics, by cellular fatty acid composition (GC-FAME), the utilization of carbon sources (BioLog System), and 16S rRNA sequence of the isolated bacterium were 99% homologous to those of Serratia plymuthica strains. Artificial inoculation of the bacterium produced the same brown or soft rot symptoms on the ginseng roots, from which the same bacterium was isolated. This is the first report of bacterial root rot caused by the Serratia plymuthica in ginseng in Korea. Serratia plymuthica has been used as antagonistic microorganism for biological control on several crop plants. But it was proved pathogen of ginseng at humid condition in this study.
Keywords
Bacterial root rot disease; Biolog system; ginseng; Panax ginseng; Serratia plymuthica;
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