Abstract
The aim of the present study was to focus on the growth promotion and wilt diseases protection of tomato plants by Bacillus sp. LBF-01.The plant growth promotion (both in vitro and in vivo) and diseases protection mechanism were studied following standard protocols. This bacterial strain showed positive PGP and antifungal traits against the wilt pathogen Fusarium sp. The seed bacterization with Bacillus sp. LBF-01 improved the germination rate of tomato seeds by 20% compared to the control whereas the vigor index was increased by 854.026%.The percentage of disease protection by Bacillus sp. LBF-01 against root-rot disease inoculated was inversely proportional to the doses of fungal spores inoculum. Under in vivo condition, the PGP bacteria enhanced the seedling growth in nursery as well as field condition. Application of Bacillus sp. LBF-01 enhanced the activity of defense related enzymes in root and leaves. Bacillus sp. LBF-01 treatment had significantly enhanced total chlorophyll and carotenoids contents of leaves by 77.78 and 52.5% over untreated control plants. It is evident from the present study that the application of the Bacillus sp. LBF-01 bacterial strain in tomato soil improved the potentiality of the plant by systemic resistance and control the wilt diseases for tomato production.
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