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Inhibitory Effects of Bacterial Isolate Stenotrophomonas sp. KTGBP10 against Viral Infection to Tobacco Plants  

Kim Young-Sook (Chungnam National University)
Hwang Eui-Ii (KT&G Central Research Institute)
Oh Jung-Hoon (KT&G Central Research Institute)
Kim Kab-Sig (KT&G Central Research Institute)
Yeo Woon-Hyung (KT&G Central Research Institute)
Publication Information
Journal of the Korean Society of Tobacco Science / v.26, no.2, 2004 , pp. 79-84 More about this Journal
Abstract
During the screening of antiviral substances having inhibitory effects on tobacco mosaic virus (TMV) infection to tobacco plants, we found a bacterial isolate KTGBP10, which was identified as a Stenotrophomonas sp., strongly inhibited the infection of TMV. When the culture filtrate from KTGBP10 was applied on the upper surface of leaves of Xanthi-nc tobacco plants at the same time or 24 hours before TMV inoculation, almost complete inhibition of TMV infection was achieved. And $40\%$ inhibition was shown with application of the culture filtrate to the under surface of leaves. In field trials, transmission of TMV from diseased seedlings to the healthy ones during transplanting work was reduced by $87.1\~92.6\%$ when the culture filtrate or cell suspension was sprayed onto the tobacco seedlings, cv. NC82, 24 hours before transplanting. No toxic effect was observed on the tobacco plants. When the broth filtrate of KTGBP10 was supplied by soaking through the cut-leaves before and/or after virus inoculation, the TMV infection was also inhibited by $50.4\~65.3\%$.
Keywords
viral disease; tobacco plants; Stenotrophomonas sp.;
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