Applied Selenium as a Powerful Antioxidant to Mitigate the Harmful Effects of Salinity Stress in Snap Bean Seedlings

Selenium (Se) plays several significant roles in regulating growth, development and plant responses to various abiotic stresses. However, its influence on sulfate transporters (SULTRS) achieving the harmony with other salt-tolerance features is still limited previous literatures. This study elucidated effect of Se supplementation (5, 10 20 µM) salt-stressed (50 mM NaCl) snap bean seedlings. Generally, results indicated that had dual effects salt stressed seedlings according concentration. At a low level (5 µM), plants demonstrated improvement shoot (13.8%) root (22.8%) fresh weight, chlorophyll (7.4%), b (14.7%), carotenoids (23.2%), leaf relative water content (RWC; 8.5%), proline (17.2%), total soluble sugars (34.3%), free amino acids (FAA; 18.4%), K (36.7%), Ca (33.4%), K/Na ratio (77.9%), superoxide dismutase (SOD; 18%), ascorbate peroxidase (APX;12.8%) guaiacol (G-POX; 27.1%) compared untreated plants. Meanwhile, most these as well sulfur (S), catalase (CAT) were obviously decreased parallel increasing applied up µM. The molecular revealed three membrane (SULTR1, SULTR2 SULTR 3) leaves salinity responsive genes (SOS1, NHX1 Osmotin) displayed different expression patterns under treatments. Conclusively, at doses can be beneficial mitigating salinity-mediated damage functioning homeostasis tolerance features.