اثرات اسمزی و یونی تنش شوری با استفاده از پاسخ‌های فتوسنتزی گندم

Salinity affects plant growth by the osmotic stress of salt around the roots as well as by toxicity caused by excessive accumulation of salt in leaves. A pot experiment was carried out to investigate short-term effects of osmotic stress on photosynthetic traits of four durum wheat genotypes differing in salt tolerance under low concentrations of KCl and NaCl. Gas exchange and photosynthesis were reduced immediately after the onset of osmotic stress due to the salt concentration outside the roots. Similar response of photosynthetic traits to iso-osmotic concentrations of KCl and NaCl was due to osmotic