Three-month-old mulberry (Morus alba L.) cultivars (salt tolerant cv. S1 an
d salt sensitive cv. ATP) were subjected to different concentrations of NaC
l for 12 d. Leaf area, dry mass accumulation, total chlorophyll (Chl) conte
nt, net CO2 assimilation rate (P-N), Stomatal conductance (g(s)), and trans
piration rate (E) declined, and intercellular CO2 concentration (C-i) incre
ased. The changes in these parameters were dependent on stress severity and
duration, and differed between the two cultivars. The tolerant cultivar sh
owed a lesser reduction in P-N and g(s) coupled with a better C-i and water
use efficiency (WUE) than the sensitive cultivar.