بررسی برخی پاسخ‌های فیزیولوژیک دو رقم گندم نان در حضور کلرید سدیم و کلرید پتاسیم

Plant growth and yield are affected by the osmotic stress of the salt around the roots as well as ion toxicity caused by salt accumulation in leaves. In order to understand physiological responses of two salt-sensitive and tolerant bread wheat cultivars exposure to iso-osmotic treatments of NaCl and KCl, a greenhouse experiment was carried out. The results showed that both salt treatments were caused to decrease stomatal conductance, RWC, SPAD, and shoot dry biomass of two wheat cultivars. Although, NaCl treatment decreased stomatal conductance much more when compared to KCl treatment, but the effects were the same for other traits. As, both salt treatments showed similar effects on physiological traits of two bread cultivars, it seems that these changes was caused more to osmotic stress of the salt outside the roots, than the Na+ toxicity, because both treatments decreased immediately plant water absorption, growth and similar physiological prosses. Finally, these changes caused to water stress effects.