EFFECT OF NACL ON PHOTOSYNTHESIS PARAMETERS IN 2 CULTIVARS OF MULBERRY

The responses of net CO2 assimilation rate (P-N), Stomatal conductance (g(s)), transpiration rate (E) and intercellular CO2 concentration (C -i) in two mulberry (Morus alba L.) cultivars (S30 and K2, salt tolera nt and salt sensitive, respectively) at different concentrations of Na Cl were measured. P-N, g(s) and E were declined whereas C-i was increa sed. The changes in these parameters were dependent on stress severity and duration, and differed between the two cultivars. The tolerant cu ltivar showed a lesser reduction in P-N and g(s) and a better water us e efficiency (WUE).