Pectobacterium brasiliense as a Causative Agent for Soft Rot of Radish in Korea

In October 2021, soft rot disease seriously affected radish crop in Dangjin, Chungcheongnam-do, Korea. The infected radishes were stunted and turned dark green, with yellowish leaf foliage. A slimy, wet, and decayed pith region was observed in the infected roots. The bacterial strain KNUB-03-21 was...

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Published inSigmulbyeong yeon'gu Vol. 29; no. 1; pp. 64 - 71
Main Authors Park, Kyoung-Taek, Hong, Soo-Min, Back, Chang-Gi, Kang, In-Kyu, Lee, Seung-Yeol, Ten, Leonid N., Jung, Hee-Young
Format Journal Article
LanguageEnglish
Published 한국식물병리학회 01.03.2023
Subjects
농학
Pathogenicity
Pectobacterium brasiliense
Raphanus sativus
Soft rot
Multilocus sequence analysis
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Summary:In October 2021, soft rot disease seriously affected radish crop in Dangjin, Chungcheongnam-do, Korea. The infected radishes were stunted and turned dark green, with yellowish leaf foliage. A slimy, wet, and decayed pith region was observed in the infected roots. The bacterial strain KNUB-03-21 was isolated from infected roots. The biochemical and morphological characteristics of the isolate were similar to those of Pectobacterium brasiliense. Phylogenetic analysis based on the sequences of the 16S rRNA region and the concatenated DNA polymerase III subunit tau (dnaX), leucine-tRNA ligase (leuS), and recombinase subunit A (recA) genes confirmed that the isolate is a novel strain of P. brasiliense. Artificial inoculation of radish with P. brasiliense KNUB-03-21 resulted in soft rot symptoms similar to those observed in infected radish in the field; subsequently, P. brasiliense KNUB-03-21 was reisolated and reidentified. To our knowledge, this is the first report of P. brasiliense as a causal pathogen of radish soft rot in Korea.
ISSN:1598-2262
2233-9191
DOI:10.5423/RPD.2023.29.1.64