Tomato seedlings growth (Solanum lycopersicum) promoted by bacteria Bacillus amyloliquefaciens subsp. plantarum FZB42 in organic system

Abstract

This study we sought to evaluate the action of the bacteria Bacillus amyloliquefaciens subsp. plantarum in the production of organic seedlings of two cultivars (Santa Clara I-5300 and Cereja 261) from tomato (Solanum lycopersicum L.) through inoculated seeds. And investigate bacterial characteristics related to plant growth promotion. For this, we used FZB42 solution at a concentration of 1x10¹¹ CFU/mL, with treatments correspond to percentages by volume (20% FZB42; 80% of FZB42 and control 100% distilled water) at a ratio of 320 uL/g seed. The germination percentage was not influenced by the treatments, and FZB42 to 20% increased the shoot in cultivar Cereja. In seedling production, FZB42 to 20% promoted growth while FZB42 to 80% decreased it. Inoculation with the two doses tested of FZB42 enhanced the contents of chlorophyll a, b and total in the tomato seedling. The FZB42 strain showed positive results for production of indole compounds and siderophore; and in a dose of 20% was more advantageous to the tomato seedling, promoting shoot growth with added of 47.7% for Santa Clara and 15.5% for Cereja when compared to the control.