This research aims at studying the effect of irrigation with different levels of NaCl on
the growth and development of Syrian pears (Pyrus syriaca). The results showed that:
1. Salt stress reduced chlorophyll content (a,b and a+b) in salt treatment
s compared to
the control , which contained 67.48 mg/g (a), 111.62 mg/g (b) and 204.76 mg/g (a+b),
while 1750 ppm of NaCl treatment contained 49.34 mg/g (a), 49.86 mg/g (b) and 158.77
mg/g (a+b) respectively. Treatment with 500 ppm of NaCl increased significantly
chlorophyll content compared to other salt treatments.
2. Leaves content of proline increased with increasing NaCl levels. It reached 870.8
ng/g when irrigation water contained 1250 ppm of NaCl, while it decreased in other salt
treatments. Leaves dry matter increased with the increase salt levels (24.50% for the
control, and 44.86% for 1750 ppm of NaCl).
