ArticleScientific reports2026
Lactic acid bacteria priming of antioxidant defense systems mitigates oxidative damage and preserves postharvest quality in tomato under drought stress.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study investigated foliar-applied Lactic Acid Bacteria (LAB) as a biostimulant to enhance postharvest resilience and quality of tomato (Solanum lycopersicum L.) fruit under drought stress. A randomized greenhouse experiment was conducted with four treatments: optimal irrigation, drought stress, and LAB applications combined with both irrigation regimes. Upon reaching physiological maturity, harvested fruits were stored at 7°C for a 20-day period, with evaluations of physicochemical and biochemical markers at regular intervals. Results demonstrated LAB application as a biochemical primer, significantly mitigating drought-induced physiological deterioration by stabilizing fruit pH and attenuating tissue softening. Notably, LAB treatments elicited a robust systemic antioxidant response, increasing total phenolics, flavonoids, and carotenoids. This was accompanied by upregulation of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). Moreover, a significant reduction in malondialdehyde (MDA) levels indicated that LAB effectively preserves cellular membrane integrity by suppressing lipid peroxidation. These findings suggest that foliar LAB intervention acts as a potent metabolic modulator, optimizing the antioxidant defense machinery and extending the postharvest shelf-life of tomatoes under environmental stress. This research provides a sustainable and 'green' framework for enhancing the economic value and nutritional longevity of horticultural crops amid escalating climate challenges.
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