In order to understand the response of Lotus corniculatus to salt stress, ions content and some growth factors were analyzed in three varieties of this plant, namely, Ardebil, Karaj, and Jolfa. Lotus corniculatus plants were exposed to 0, 50, 100, and 150 mM NaCl in hydroponic condition. The amounts of anions (Cl-and NO3-) and cations (K+ and Na+) in leaves as well as shoot and root dry weights, stem and root length, leaf area, and number of leaves were analyzed. The amount of Na+ and Cl- significantly increased in all varieties. However, with an increase in NaCl concentration, K+ and No3- content decreased significantly in all varieties (p<0.05). Growth factors (root and shoot length and weight, leaf area, and leaf number) declined significantly with increasing NaCl concentration. Considering alterations in growth factors and ions content, it seems that "Jolfa" and "karaj" have a higher capacity to tolerate salt stress particularly in100 and 150 mM NaCl compared to "Ardebil". Manuscript profile

Salinity is an important environmental factor that limits plant growth and production. Grape is classified as salt sensitive plants. The object of this study was to evaluate effects of salinity on membrane lipid peroxidation, antioxidant components, and antioxidative enzymes activity in ten grape genotypes native to the regions around Urmia Salt Lake.Malondialdehyde content and protective enzymes activities in roots and leaves of ten genotypes increased significantly (p≤0.05) under salinity. Salinity had an obvious effect on the accumulation of total phenolics content and induced phenylalanine ammonia-lyase enzyme activity in all genotypes. H6 showed low increases in Malondialdehyde content, also this genotype showed good enzymes activities and total phenolics content and PAL activity. There were significant positive correlations (p≤0.01, r2=0.7) between antioxidative enzyme activities, total phenolics content, and phenylalanine ammonia-lyase activity in the leaves of all genotypes. It seems that H6 showed a higher capacity to tolerate salinity compared to the other genotypes. Manuscript profile