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Influence of plant growth promoting rhizobacteria on growth of tomato (Lycoperiscon esculentum Mill.) raised in pro trays
Abstract
A study was carried out under polyhouse conditions with six different strains of Plant Growth
Promoting Rhizobacteria (PGPR) to screen and select the most efficient PGPR for inoculating tomato
(Lycoperiscon esculentum Mill.). Tomato seedlings were raised in pro trays for the study. Tomato
seedlings inoculated with PGPR showed improved plant growth parameters than the uninoculated
ones. Each PGPR had a varied effect on the tomato seedlings. Considering the plant growth parameters
Paenibacillus polymyxa proved to be the best PGPR out of the ones studied for inoculating tomato
in pro trays.
... The PGPR is another group of beneficial soil microbes that stimulate plant growth directly or indirectly. The direct mechanism involves supplying plants with nutrients and phytohormones, and indirect mechanism reduced susceptibility to disease by producing antifungal metabolites, like HCN, phenazines, pyrrolnitrin, 2,4-diacetylphloroglucinol, etc. (Das et al. 2013;Shakuntala et al. 2019). The synergistic interaction of AMF and PGPR in soil resulting in plant growth acceleration was previously described (Anuroopa et al. 2017;Behera et al. 2019). ...
China aster and gaillardia are flowering plants with high economic importance in floriculture. In the present investigation, response of China aster and gaillardia seedlings to inoculation with the arbuscular my-corrhizal fungus Funneliformis mosseae + the plant growth-promoting rhizobacterium Bacillus sonorensis was studied by growing in multipots (pro trays). The germination percentage and plant growth parameters: length of shoots, roots and whole seedlings, stem diameter, biovolume index, plant strength, vigor index, dry weight and nutrient uptake, were analyzed 60 days after sowing. The microbial parameters, mycorrhizal root colonization and spore count, and the population of B. sonorensis in the substrate were also determined. The results brought out that growth of inoculated seedlings was significantly improved as compared to uninocu-lated seedlings. Based on the plant growth and microbial parameters studied, it was concluded that inoculating the substrate in pro trays with the microbial consortium results in producing vigorously growing seedlings.
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