Salinity effects on toxic ions accumulation in grape (Vitis L.)

To study the salinity tolerance of own rooted grape cuttings taken from H6 grape genotype, hydroponically grown were treated with different concentrations of NaCl during 14 days. H6 genotype was a hybrid of V. vinifera cv. GharaUzum × V. riparia cv. Kober 5BB. Chloride (Cl-) and sodium (Na+) ions accumulated in the various parts of the vine with increasing external NaCl concentration. Na+ accumulation exceeded that of Cl- in roots of H6 genotype under salinity, but in lamina Cl- accumulated higher than Na+. Cl- uptake rate was 0.9174μmol.gDW-1.day-1 in lamina and was 0.2520μmol.gDW-1.day-1 in root, also Na+ uptake rate was 0.8560μmol.gDW-1.day-1 in lamina and 0.6080μmol.gDW-1.day-1 in root. Indeed there is no strong control of Cl- transport from root to shoot in H6 and the roots of H6 showed a high ability to restrict Na+ uptake compare to Cl-. There was positive correlation (P<0.01, r2>0.9) between Cl- and Na+ concentrations in root and lamina of H6 genotype

Keywords:

salt , grape , Cl- accumulation , ion uptake rate