1. Exogenously applied poly-γ-glutamic acid alleviates salt stress in wheat seedlings by modulating ion balance and the antioxidant system
- Author
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Zhengfei Guo, Lijun Gan, Na Yang, and Changhua Zhu
- Subjects
0106 biological sciences ,0301 basic medicine ,Salinity ,Antioxidant ,Health, Toxicology and Mutagenesis ,medicine.medical_treatment ,Salt (chemistry) ,Sodium Chloride ,01 natural sciences ,Antioxidants ,Superoxide dismutase ,Soil ,03 medical and health sciences ,Stress, Physiological ,medicine ,Environmental Chemistry ,Food science ,Triticum ,chemistry.chemical_classification ,biology ,Superoxide Dismutase ,Abiotic stress ,Sodium ,food and beverages ,Salt Tolerance ,General Medicine ,Glutamic acid ,Catalase ,Pollution ,Plant Leaves ,030104 developmental biology ,Enzyme ,Polyglutamic Acid ,chemistry ,Agronomy ,Seedlings ,Potassium ,biology.protein ,010606 plant biology & botany ,Peroxidase - Abstract
Salt stress is a main abiotic stress that limits agricultural productivity in many parts of the world. To investigate whether poly-γ-glutamic acid (γ-PGA) can alleviate the negative effects of salt stress on wheat, a foliar application of 400 mg/L γ-PGA was applied to wheat seedlings, which were then subjected to 150 mM NaCl. Our results showed that after application of γ-PGA, the plant height, the plant weight, and the antioxidant enzymes including superoxide dismutase, peroxidase, and catalase were significantly increased compared with the treatment of 150 mM NaCl alone. Meanwhile, γ-PGA application also resulted in high accumulation of K+ and decreased storage of Na+ in wheat leaves. These results suggest that γ-PGA treatment may improve salt tolerance of wheat by diminishing ionic imbalances and enhancing antioxidant capacity. Our results indicate that exogenous γ-PGA could alleviate the damage caused by salt stress.
- Published
- 2017
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