5. Nutri-Priming as an Efficient Means to Improve Germination and Growth of Mung bean (Vigna radiata L.) Grown Under NaCl Stress
Abstract
Salinity is a major environmental issue that reduced the crop growth and productivity. The micronutrients like Zn have the potential to decrease the toxic effects of salinity. The recent study was conducted to examine to effect of ZnSO4 on germination percentage, physiological, biochemical attributes and antioxidant enzymes (CAT, POD, SOD) activities of Vigna radiata L. The seeds were primed with two (100ppm and 200ppm) concentrations of ZnSO4 and then grown under various levels of NaCl (0-50-75-100 mM) stress. The results indicated that various physiological, morphological and biochemical parameters negatively influenced by salt stress. However, the nutripriming with ZnSO4 enhanced the germination percentage and growth of Vigna radiata under NaCl stress. The comparison of both concentrations showed that 100ppm improved the morphological parameters (root, shoot length, fresh and dry weight of root, shoot) and Biochemical parameters (proline and total soluble protein), While the nutripriming with 200ppm improved the chlorophyll (a & b), phenolics and flavonoids contents more than control. The Zn application improves the Antioxidant enzymes (CAT, POD, SOD) but at higher doses cause reduction. This is environment friendly technique and can be used in future.
Keywords; Flavonoids; Protein; Proline; Seed priming; Salinity; ZnSO4
