Effect of NaCl Salt Stress on Physiological and Morphological Characteristic of Vegetative Peach- Almond Hybrid (GF677) Rootstock

Iran is one of the major almond producer in the world and salinity is one of the most important problem in growing of this crop. In this research the effect of salt stress on growth and development of vegetative rootstock GF677 was evaluated. Concentrations of 0، 15، 30، 45، 60 and 75 mM NaCl were added to pots of this rootstock and after 10 weeks from salt stress، some physiological parameters were evaluated. In this research the results showed that the amount of chlorophyll was decreased with increasing of salt concentration. Shoot dry weight and stem length was decreased by increasing salt concentration while the amount of soluble sugars was decreased until 45 mM of NaCl and then increased with increasing of NaCl concentrations. Also it was seen this rootstock has better ability to withstand osmotic stress and decreasing osmotic potential by accumulation of solutes، until concentration of 60 mM of NaCl. The amount of proline، sodium، potassium and chlorine in shoot were increased but growth rate and osmolyte accumulation was decreased at higher concentration of NaCl because of ions toxicity and probably affecting photosynthesis.