مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

Understanding the mechanisms of salt tolerance and the physiological and biochemical factors are very important in plant crops. Salinity-minerals (Ca^2+, Mg2+, SO4^2-) interactions, which have been shown to be important in plants grown in saline conditions, were studied in durum wheat (Triticum turgidum L.). Two genotypes of durum wheat, one salt-tolerance (ICDW751) and the other salt-sensitive (ICDW324) were grown in nutrient solution containing 0, 50, 100 and 150 mM. NaCl. Amount of minerals of Ca^2+, Mg^2+ and SO4^2-were determined in the shoot and roots. Usually, salinity reduced Ca2+ and Mg 2+ contents in shoot and root of both genotypes, mainly in the salt-sensitive genotype. Apparently, SO4^2- content in shoot increased as the medium salinity increased, especially in the salt- tolerance genotype. Salinity increased significantly Na+/Ca^2+ ratio and sodium adsorption ratio (SAR) = Na+/(Ca^2+ +Mg^2+)½ of shoot and root in both genotypes, mainly in the salt-sensitive genotype. Thereby, we suggested that ratio of Na+/Ca^2+ and especially amount of SAR in durum wheat (Triticum turgidum L.) are suitable for discrimination salt-tolerance genotype from salt-sensitive genotype.