Fig. 2

Determination of physiological parameters in Pokkali and IR64 rice seedlings in response to salinity stress. Ten-day old rice seedlings were subjected to salinity stress (200 mM NaCl) over a period of 2 h and changes were observed in shoot and root (a) Na⁺ and Na⁺/K⁺ ratio and b K⁺/Na⁺ ratio. c Determination of relative ion leakage (%) in shoot tissues under salinity stress and root cell death. d CoroNa dye staining of Pokkali and IR64 roots (e) DAB staining in roots under control and salinity stress (2 h) conditions. Significant differences as determined by student's t-test (p-values <0.05) are represented by an asterisk (*)