First Report of Pectobacterium brasiliense Causing Soft Rot on Graft Cactus in Korea
First Report of Pectobacterium brasiliense Causing Soft Rot on Graft Cactus in Korea
- Kyoung-Taek Park Soo-Min Hong Chang-Gi Back San Yeong Kim Seung-Yeol Lee In-Kyu Kang Leonid N. Ten
- 한국식물병리학회
- Research in Plant Disease(식물병연구)
- 제28권 제3호
- 등재여부 : KCI등재
- 2022.09
- 172 - 178 (7 pages)
The graft cactus (Gymnocalycium mihanovichii) continues to be exported to more than 20 countries worldwide. In April 2021, typical bacterial symptoms of soft rot were observed in the graft cactus (cv. Yeonbit) in Goyang, Gyeonggi-do, Korea, resulting in economic losses in cactus production. The stems turned dark brown and the flowers were covered with black rot. The bacterial strain designated as KNUB-01-21 was isolated from infected stems and flowers. The results of the morphological and biochemical tests of the isolate were similar to those of Pectobacterium brasiliense. For molecular analysis, the 16S rRNA region and three housekeeping genes (dnaX, leuS, and recA) of the strain KNUB-01-21 were amplified. Based on the results of the molecular analysis and morphological and biochemical tests, KNUB-01-21 was identified as P. brasiliense. The pathogenicity of KNUB-01-21 on graft cactus was confirmed by an inoculation test. Artificial inoculation using P. brasiliense KNUB-01-21 produced soft rot symptoms on the grafted cactus, and the same bacterium was re-isolated and re-identified. This is the first report of P. brasiliense causing soft rot in graft cactus in Korea.
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