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Plant Growth Promotion by Isolated Strain of Bacillus subtilis for Revegetation of Barren Lakeside Area  

Kim, Kyung-Mi (Department of Biological Sciences, Kangwon National University)
Song, Hong-Gyu (Department of Biological Sciences, Kangwon National University)
Publication Information
Korean Journal of Microbiology / v.46, no.1, 2010 , pp. 33-37 More about this Journal
Abstract
Rhizobacterial strain isolated from barren soil, Bacillus subtilis RFO41 exhibits a high level of phosphate solubilizing activity and produces some phytohormones. Its promoting effect on the growth of Xanthium italicum Moore, a wild plant growing at lakeside barren land and thus a good candidate plant for revegetation of barren lakeside was evaluated in the in situ test for 19 weeks at Lake Paro, Kangwon-do. Strain RFO41 could enhance the dry weight of X. italicum by 67.7%. It also increased the shoot length of X. italicum plant by 21.1% compared to that of uninoculated control. Both growth enhancements had statistical significance. However, the inoculation did not show any effect on the root growth, which might be due to the breakage of tiny root. Denaturing gradient gel electrophoresis analysis showed that the inoculated bacteria were maintained in the soils, and the indigenous bacterial community did not exhibit any significant change. This plant growth promoting capability may be utilized as an environment-friendly and low cost revegetation method, especially for the sensitive areas such as barren lakeside lands.
Keywords
B. subtilis; DGGE; plant growth promotion; revegetation;
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