Isolation and characterization of avirulent and virulent strains of agrobacterium tumefaciens from rose crown gall in selected regions of South Korea

Murugesan Chandrasekaran, Jong Moon Lee, Bee Moon Ye, So Mang Jung, Jinwoo Kim, Jin Won Kim, Se Chul Chun

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Agrobacterium tumefaciens is a plant pathogen that causes crown gall disease in various hosts across kingdoms. In the present study, five regions (Wonju, Jincheon, Taean, Suncheon, and Kimhae) of South Korea were chosen to isolate A. tumefaciens strains on roses and assess their opine metabolism (agrocinopine, nopaline, and octopine) genes based on PCR amplification. These isolated strains were confirmed as Agrobacterium using morphological, biochemical, and 16S rDNA analyses; and pathogenicity tests, including the growth characteristics of the white colony appearance on ammonium sulfate glucose minimal media, enzyme activities, 16S rDNA sequence alignment, and pathogenicity on tomato (Solanum lycopersicum). Carbon utilization, biofilm formation, tumorigenicity, and motility assays were performed to demarcate opine metabolism genes. Of 87 isolates, 18 pathogenic isolates were affirmative for having opine plasmid genes. Most of these isolates showed the presence of an agrocinopine type of carbon utilization. Two isolates showed nopaline types. However, none of these isolates showed octopine metabolic genes. The objectives of the present study were to isolate and confirm virulent strains from rose crown galls grown in the different regions of Korea and characterize their physiology and opine types. This is the first report to describe the absence of the octopine type inciting the crown gall disease of rose in South Korea.

Original languageEnglish
Article number452
JournalPlants
Volume8
Issue number11
DOIs
StatePublished - Nov 2019

Keywords

  • Agrobacterium tumefaciens
  • Crown gall
  • Opines
  • Pathogenicity
  • Rose

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