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KMID : 0903520070500010023
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2007 Volume.50 No. 1 p.23 ~ p.28
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Selection of the Auxin, Siderophore, and Cellulase-Producing PGPR, Bacillus licheniformis K11 and Its Plant Growth Promoting Mechanisms
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Jung Hee-Kyoung
Kim Jin-Rack
Woo Sang-Min
Kim Sang-Dal
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Abstract
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Auxin-producing antagonistic bacterium K11, which can inhibit Phytophtora capsici, was isolated from a local red-pepper field soil in Gyeong-buk. In order to check for additional PGPR (plant growth promoting rhizobacterium) functions of the strain K11, we confirmed siderophore and cellulase productions by CAS (chrome azurol S) blue agar and CMC plate with congo red, respectively. The strain K11 was identified as Bacillus licheniformis with 98% similarity on 16s rDNA comparison and Biolog analyses. B. licheniformis K11 promoted mung bean adventitious root induction and enhanced root growth of mung bean (160%), pea (150%) and Chinese cabbage (130%). Also, B. licheniformis K11 was able to effectively suppress (63%) P. capsici causing redpepper blight in the pot in vivo test. Therefore, we could select a triple-functional PGPR which has auxin, siderophore, and cellulase producing ability for effective crops production in organic farming.
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KEYWORD
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PGPR (plant growth promoting rhizobacterium), auxin, biocontrol, siderophore, cellulase
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