Gibberellin Increased Yield of Sesbania pea Grown under Saline Soils by Improving Antioxidant Enzyme Activities and Photosynthesis

Crop yield is the ultimate manifestation of all physiological changes crops and external environmental influence. A controlled study was conducted to investigate effects exogenous gibberellin on morphological characteristics formation sesbania pea grown in saline soils. Seeds were presoaked with four levels Gibberellin (GA3) solutions (0, 202.1, 404.2 606.3 µM) for 6 h, then manually direct-sown a seeding rate 45 kg ha−1. The parameters (plant height, root length, dry weight), photosynthesis (chlorophyll b content), activities antioxidant enzymes (superoxide dismutase (SOD); peroxidase (POD); catalase (CAT)), contents soluble protein NSC (non-structural carbohydrates), seed increased application gibberellin, especially at level µM GA3. But GA3 had no significant 1000-seed weight. Our suggested that appropriate could improve soils by increasing antioxidative defense.