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http://dx.doi.org/10.4014/mbl.1902.02005

Induced Systemic Resistance in plants by Bacillus sp. Isolated from Dok-do Islands  

Kim, Seung-Kun (School of Life Sciences, BK21 Plus KNU Creative BioResearch Group)
Son, Jin-Soo (School of Life Sciences, BK21 Plus KNU Creative BioResearch Group)
Kwon, Duck-Kee (Department of Biology Education, Kyungpook National University)
Ghim, Sa-Youl (School of Life Sciences, BK21 Plus KNU Creative BioResearch Group)
Publication Information
Microbiology and Biotechnology Letters / v.47, no.4, 2019 , pp. 596-602 More about this Journal
Abstract
In September 2017, the rhizospheric soil of Tetragonia tetragonoides (Pall.) Kuntze was further sampled. One hundred and thirty eight species of microorganisms were isolated from the soil. Indole-3-acetic acid (IAA) production, siderophore production, and phosphate degradation were examined in order to confirm bacterial growth from isolated microorganisms. As a result, most strains were able to produce auxins or siderophores and to solubilize phosphate. In addition, 138 isolated strains were treated with tobacco extract and conferred pathogen resistance to host plants upon treatment. As a result, 35 strains that were able to reduce pathophysiology by more the 60% were selected. Among them, 6 strains with high induced systemic resistance (ISR) activity were found. All of these strains belong to the genus Bacillus according to the 16S rDNA sequence analysis. Bacillus aryabhattai KUDC6619 showed outstanding effects with reduced infection in tobacco and pepper plants. Probably, these Bacillus species play a beneficial role by association with T. tetragonoides for its survival in the harsh conditions found on the island of Dokdo.
Keywords
Bacillus; Dok-do Islands; rhizospheric soil; induced systemic resistance;
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