Exploring the impact of formulated bacterial consortia on the growth of Solanum lycopersicum; towards sustainable biofertilizer development

Abstract

Biofertilizers are a sustainable solution for the adverse biogeochemical impacts exerted by synthetic agrochemicals. The application of biofertilizers is an eco-friendly approach to facilitate plant growth and development. Biofertilizers are mainly composed of living or dormant microbes, which are usually applied to the soil. These microbes encourage plant growth by a wide variety of mechanisms which includes phytohormone production, nutrient solubilization, biocontrol ability, etc. In the present study, bacterial cultures were isolated from nutrient-rich sample sources and screened for plant growth-promoting (PGP) traits. After several PGP trait screenings; two bacterial consortia that could aid the growth and development of plants were formulated. Further, these screening results were validated by applying selected bacterial strains and the prepared consortia on tomato plants (Solanum lycopersium). The growth parameters were evaluated at the plant's germinative, vegetative, and reproductive stages. The biochemical characteristics under the experimental conditions were also examined at various intervals. The results revealed that both our consortia were able to stimulate the growth and development of the host plant. Hence, the formulated bacterial combinations have real potential to become ecologically sustainable biofertilizers.