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http://dx.doi.org/10.5423/RPD.2019.25.1.33

Ocurrence of Clubroot Caused by Plasmodiophora brassicae on Kohlrabi in Korea  

Song, MinA (Eco-friendly Agricultural Research Department, Jeju-do Agricultural Research and Extension Services)
Choi, InYoung (Agricultural Environment Division, Jeollabuk-do Agricultural Research and Extension Services)
Song, JeongHeub (Eco-friendly Agricultural Research Department, Jeju-do Agricultural Research and Extension Services)
Lee, KuiJae (Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University)
Shin, HyeonDong (Division of Environmental Science and Ecological Engineering, Korea University)
Galea, Victor (School of Agriculture and Food Sciences, The University of Queensland)
Publication Information
Research in Plant Disease / v.25, no.1, 2019 , pp. 33-37 More about this Journal
Abstract
From 2016 to 2018, approximately 15% of kohlrabi were observed displaying significant clubroot symptoms in farmer's fields in Jeju, Korea. The initial infection appeared as hypertrophy of root hairs, and as the disease progressed, galls formation occurred on the main roots, finally disease progress resulted in yellowing and wilting of leaves. Pathogenicity was proven by artificial inoculation of plants with resting spore suspension, fulfilling Koch's postulates. The resting spore is one-celled, spherical and subspherical, colorless, and $3-5{\mu}m$ in diameter. On the basis of the morphological characteristics and phylogenetic analyses of internal transcribed spacer rDNA, the causal agent was identified as Plasmodiophora brassicae. To our knowledge, this is the first report on the occurrence of P. brassicae on kohlrabi in Korea.
Keywords
Clubroot; Kohlrabi; Plasmodiophora brassicae; Resting spore;
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Times Cited By KSCI : 4  (Citation Analysis)
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