Author(s):

N Olivia Devi, RK Tombisana Devi, T Rajesh, D Thakuria, K Ningthoujam, Manashi Debbarma and Monika Hajong

Abstract: Rocky tomato seeds variety was treated with endophytic Bacillus isolates to determine their efficacy and ability to enhance seedling vigour and germination per cent as a potential plant growth promoter. Twelve screened endophytic Bacillus isolates were evaluated for their germination and vigour of tomato seeds in in vitro condition. Seed germination percent ranged between 60-95% with lowest in uninoculated control. Among them, Bacillus velezensis ERBS51 treated seeds had the highest germination per cent (95%) and vigour index (1073.50 and 1472.5) at both 7^th and 14^th day which was the best performing isolate among the twelve. Bacillus sp. ERBS10 also gave significant good result with 88% germination per cent along with 953 and 1287 vigour indexes at 7^th and 14^th days. The root length and shoot length were also found higher in both the isolates. The result indicates that Bacillus velezensis ERBS51 was found most effective in enhancing plant growth.

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