Evaluation of Salinity Effects on Growth and Nutrition of Some Mineral Nutrients in Four Iranian Grape Genotypes

The effects of salinity on growth and mineral nutrition of four Iranian grape genotypes (Ghazandayi, Aghshani, Anghootkeh and Shirazi) was studied. Rooted cuttings with 4-5 fully expanded leaves were grown in aerated Hoagland solutions and salinity was applied as nutrient solutions containing 0, 25, 50 and 100 mM of NaCl for two weeks. Growth significantly (P<0.05) decreased by increasing salinity in all genotypes. Sh irazi genotype was more severely affected than others. Chloride and sodium contents were increased in all plant parts and all genotypes with increasing salinity. Sodium accumulation exceeded that of chloride in all parts and all treatments. Anghootkeh genotype had lower and Shirazi had higher chloride and sodium accumulation in shoots of all treatments. There was a significant negative correlation (P<0.01) between nitrate and chloride in all genotypes. Potassium content decreased in all genotypes with increasing salinity; Anghootkeh was less affected. It seems that Shirazi is a sensitive genotype, but Anghootkeh can tolerate salinity probably by reducing Cl- transport to lamina.