The study of salinity stress influence on some morphological, biochemical and antioxidant responses of Securigera securidaca L.

In this research in order to study of stress influence(4, 8 and 12 ds/m of NaCl ) on some morphological, biochemical and antioxidantactivity of Securigera securidaca L. based on a randomized complete design with three replications, the seeds of plant were provided from Esfahan Pakan Bazr Institute and were grown in growth chamber located in Yazd University during September, 2014. Biochemical and antioxidant traits were measured spectrophotometrically. Results were showed that some morphological traits significantly decreased when salinity were increased. The pigments content were not significantly affected by different levels of salinity. Proline, total soluble sugar, flavonoid and anthocyanin content significantly increased in highest level of salinity in compared with other salinity and control treatments. Malondialdehyde (MDA) significantly increased in salinity of 12 ds/m while the most significant activity of DPPH scavenging and superoxide dismutase (SOD), peroxidase (POX) and catalase (CAT) enzymes were showed in salinity of 8 ds/m. in concluded, due to non-significant changes of morphological, biochemical and antioxidant traits in salinity of 4 ds/m especially, it may be suggested that Securiger securidaca L. is a semi-tolerant genotype under salt stress.