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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 2009; 37(2): 110-117

독도에 서식하는 가지과식물로부터 분리된 근권세균의 특성

Characterization of Rhizobacteria Isolated from Family Solanaceae Plants in Dokdo Island

Mi-Seon Ham , Yu-Mi Park , Hye-Ri Sung , Marilyn Sumayo , Choong-Min Ryu , Seung-Hwan Park and Sa-Youl Ghim

School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University, 1School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University, 2School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University, 3School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University, 4Laboratory of Microbial Genomics, Systems Microbiology Research Center, KRIBB, 5Laboratory of Microbial Genomics, Systems Microbiology Research Center, KRIBB, 6School of Life Sciences and Research Institute for Ulleungdo & Dokdo Islands, Kyungpook National University

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.

Keywords: Dokdo, Solanaceae, plant growth-promoting rhizobacteria, induced systemic resistance

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