Abstract
A hydroponic study was conducted in the wire house to
evaluate the physiological behaviour of sordan grass to NaCl
salinity. Seedlings of sordan grass were exposed upto 17 days
to four levels of NaCl salinity developed in Hoagland nutrient
solution. Coefficient of relative inhibition indicated more than
50% growth reduction at 100 mol In-:J NaCl and onwards. Increasing level of salinity reduced plant fresh weight, dry
weight, leaf area, relative growth rate and net assimilation
rate. Concentration of Na" , ct: and proline in the sordan
grass leaf increased 'while those of K+ and Mgr : decreased
with increasing salinity level. Salinity also decreased the leaf
water potential, osmotic potential and turgor pressure. Relationships between growth parameters, osmotic adjustment
and water balance in leaves are discussed.
