• Journal of Life Science
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• v.14 no.5
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• pp.859-862
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• 2004

This report investigates antifungal activity and effects of growth promotion by biosurfactant produced from Bacillus sp. LP03 and TBM40-3 against fungus causing plants disease (Glay Mold-Botrytis cinerea). Antifugal activity against B. cinerea infeeted to leek (Allium tuberosum Rottler) exhibited better than antifungal agent farming drug (smilex, Dong bang agro., Seoul, Korea.) through the field test. After infected by plant's disease, the leaves growth and number are maintained under presenting biosurfactant produced strains. Especially, one of the strains, named Bacillus sp. LP03 showed strong antifungal activity on field studies.

• Journal of Life Science
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• v.17 no.7 s.87
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• pp.944-947
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• 2007

Bacillus sp.LPO3 (producing emulsifying substances such as bio-surfactant) was used as a bio-control agent to degrade hydrocarbon (gasoline in oil spilled crop soil). The soil (brought from fertilizer store)was mixed with gasoline-spilled soil (made with Diatomaceous Earth, Sigma.U.S.A). The study was conducted for a period of 13 days, 13 days during which bacterial growth, hydrocarbon degradation and growth parameters of Bacillus sp.LP03 including shoot and root length were studied. We found that the effective of bacterial producing substance might bio-surfactants let the plants survive even more promote the growth of shoot and root length and showed antifungal activity against gray mold. Without the bacteria, they couldn't grow in oil-spilled soil not even survive. According to the results of the above experiments, we can see with following results, hydrocarbon in gasoline was reduced, day by day, then RNA dot blotting was done and it fit the results we had done. Finally, this Bacteria(producing bio-surfactant) were found to have effective bio-control agent for cropping in oil spilled soil and infected by gray mold.