Synergistic rhizobacteria enhance physio-biochemical resilience and sustain tomato yield under drought stress.
Preeti, Rai PK, Khanday DM, Choudhary SM, Singh M
Soil Health
A tablespoon of the right microbial mix stirred into your tomato transplant hole could be the difference between a shriveled August harvest and a productive one — even if the rain stops showing up.
Researchers gave drought-stressed tomato plants a cocktail of three naturally occurring soil bacteria and watched what happened. The plants held onto water better, kept their leaves greener, and produced significantly more fruit than plants left to face the dry conditions alone. The three bacteria together worked better than any single one — a true team effort happening invisibly around the roots.
Key Findings
The bacterial consortium nearly doubled total chlorophyll content in drought-stressed tomatoes, from 0.85 to 1.70 mg per gram of fresh weight.
Relative water content improved from 55.41% to 72.06% with the full consortium, compared to drought-stressed controls.
Consortium-treated plants yielded 0.94 kg per plant, outperforming single-strain inoculations (0.81–0.88 kg) and demonstrating a clear synergistic effect.
chevron_right Technical Summary
Inoculating tomato roots with a trio of common soil bacteria — Azotobacter, Pseudomonas, and Bacillus — nearly doubled chlorophyll levels and pushed drought-stressed plants to 0.94 kg of fruit per plant, outperforming any single bacterial strain alone. The consortium worked by supercharging the plants' own antioxidant defenses and water retention, keeping photosynthesis running even when soil moisture was scarce.
Abstract Preview
Beneficial rhizobacteria can enhance plant growth and stress resilience through multiple, complementary mechanisms. In this study, we investigated the combined effects of Azotobacter chroococcum, P...
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