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KMID : 1234420090370020110
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Korean Journal of Microbiololgy and Biotechnology
2009 Volume.37 No. 2 p.110 ~ p.117
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Characterization of Rhizobacteria Isolated from Family Solanaceae Plants in Dokdo Island
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Ham Mi-Seon
Park Yu-Mi
Sung Hye-Ri
Marilyn Sumayo
Ryu Choong-Min
Park Seung-Hwan
Kim Sa-Youl
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Abstract
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To characterize plant root-associated bacteria in wild plant family Solanaceae, Solanum nigrum L. plants were collected in Dokdo island. Forty four strains of nitrogen-fixing or spore-forming bacteria were isolated from rhizosphere of Solanum nigrum L. plants. Among these, 19 strains were able to produce auxin. Thirteen strains of these produced siderophore as determined by color reaction on CAS-blue plate, 8 strains were able to solubilize phosphate. The 16S rDNA genes of the isolated bacteria were amplified and sequenced. Model plants, pepper and tobacco, were established in order to evaluate the bacterial capacities eliciting growth promotion and induced systemic resistance. The plants treated with strain KUDC1009 were more resistant and capable of growth-promotion than control plants when challenged by either Xanthomonas axonopodis pv. vesicatoria or Erwinia carotovora sub. carotovora strain SCC1. Rhizobacteria isolated from Dokdo island can promote growth of wild type Solanum nigrum L. under much environmental stresses.
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KEYWORD
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Dokdo, Solanaceae, plant growth-promoting rhizobacteria, induced systemic resistance
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