Drought, a major abiotic stress, adversely affects the growth, development, and nutrient absorption of legume plants, leading to yield reduction. This study investigated the combined effects of silicon (Si) and the actinobacterial strain Streptomyces chartreusis on water-stress resistance in soybean (Glycine L.). Our experiments, conducted under simulated water deficit conditions, revealed that the combined application of Si and S. chartreusis boosted the morphological, physiological, and biochemical traits of the soybean plants. Si treatment led to higher levels of nitrogen, phosphorus, potassium, and silicon while reducing malondialdehyde (MDA) concentrations (25 %), an indicator of oxidative stress. The use of silicate and S. chartreusis boosted the activity of antioxidant enzymes, such as superoxide dismutase (35 %), catalase (61 %), and peroxidase (58 %), reducing oxidative damage and improving water relations, as shown by the increased relative water content (33 %) and membrane stability index (35 %). The plants treated with both silicate and S. chartreusis exhibited the highest levels of chlorophyll a and b, suggesting improved photosynthetic efficiency. These results highlight the potential of combining Si with beneficial microbial inoculants in sustainable agriculture to enhance soybean resilience to water stress. However, field studies are required to confirm the efficacy of these treatments in agricultural environments.

来源平台：RHIZOSPHERE