Diversities in Virulence, Antifungal Activity, Pigmentation and DNA Fingerprint among Strains of Burkholderia glumae

Hari S. Karki, Bishnu K. Shrestha, Jae Woo Han, Donald E. Groth, Inderjit K. Barphagha, Milton C. Rush, Rebecca A. Melanson, Beom Seok Kim, Jong Hyun Ham

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Burkholderia glumae is the primary causal agent of bacterial panicle blight of rice. In this study, 11 naturally avirulent and nine virulent strains of B. glumae native to the southern United States were characterized in terms of virulence in rice and onion, toxofalvin production, antifungal activity, pigmentation and genomic structure. Virulence of B. glumae strains on rice panicles was highly correlated to virulence on onion bulb scales, suggesting that onion bulb can be a convenient alternative host system to efficiently determine the virulence of B. glumae strains. Production of toxoflavin, the phytotoxin that functions as a major virulence factor, was closely associated with the virulence phenotypes of B. glumae strains in rice. Some strains of B. glumae showed various levels of antifungal activity against Rhizoctonia solani, the causal agent of sheath blight, and pigmentation phenotypes on casamino acid-peptone-glucose (CPG) agar plates regardless of their virulence traits. Purple and yellow-green pigments were partially purified from a pigmenting strain of B. glumae, 411gr-6, and the purple pigment fraction showed a strong antifungal activity against Collectotrichum orbiculare. Genetic variations were detected among the B. glumae strains from DNA fingerprinting analyses by repetitive element sequence-based PCR (rep-PCR) for BOX-A1R-based repetitive extragenic palindromic (BOX) or enterobacterial repetitive intergenic consensus (ERIC) sequences of bacteria; and close genetic relatedness among virulent but pigment-deficient strains were revealed by clustering analyses of DNA fingerprints from BOX-and ERIC-PCR.

Original languageEnglish
Article numbere45376
JournalPLoS One
Volume7
Issue number9
DOIs
Publication statusPublished - 2012 Sep 18

Fingerprint

Burkholderia glumae
Burkholderia
DNA Fingerprinting
Pigmentation
DNA fingerprinting
pigmentation
Virulence
virulence
Onions
Pigments
DNA
onions
rice
Polymerase Chain Reaction
pigments
Peptones
blight
bulbs
Rhizoctonia
Phenotype

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Karki, H. S., Shrestha, B. K., Han, J. W., Groth, D. E., Barphagha, I. K., Rush, M. C., ... Ham, J. H. (2012). Diversities in Virulence, Antifungal Activity, Pigmentation and DNA Fingerprint among Strains of Burkholderia glumae. PLoS One, 7(9), [e45376]. https://doi.org/10.1371/journal.pone.0045376

Diversities in Virulence, Antifungal Activity, Pigmentation and DNA Fingerprint among Strains of Burkholderia glumae. / Karki, Hari S.; Shrestha, Bishnu K.; Han, Jae Woo; Groth, Donald E.; Barphagha, Inderjit K.; Rush, Milton C.; Melanson, Rebecca A.; Kim, Beom Seok; Ham, Jong Hyun.

In: PLoS One, Vol. 7, No. 9, e45376, 18.09.2012.

Research output: Contribution to journalArticle

Karki, HS, Shrestha, BK, Han, JW, Groth, DE, Barphagha, IK, Rush, MC, Melanson, RA, Kim, BS & Ham, JH 2012, 'Diversities in Virulence, Antifungal Activity, Pigmentation and DNA Fingerprint among Strains of Burkholderia glumae', PLoS One, vol. 7, no. 9, e45376. https://doi.org/10.1371/journal.pone.0045376
Karki, Hari S. ; Shrestha, Bishnu K. ; Han, Jae Woo ; Groth, Donald E. ; Barphagha, Inderjit K. ; Rush, Milton C. ; Melanson, Rebecca A. ; Kim, Beom Seok ; Ham, Jong Hyun. / Diversities in Virulence, Antifungal Activity, Pigmentation and DNA Fingerprint among Strains of Burkholderia glumae. In: PLoS One. 2012 ; Vol. 7, No. 9.
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