Effects of cadmium and salinity on growth, photosynthesis and ionic contents of Zea mays
2003
Sepehr, M.F. (Islamic Azad Univ., Tehran (Iran). Dept. of Plant Science) | Ghorbanli, M. | Nejad, R.A.K.
The effects of 0, 2.5, 5 and 10 muM (Cd+2) [Cd(NO3)2x4H2O] and 0, 10, 25, 50 and 100 mM NaCl on certain parameters of growth and photosynthesis and different ionic contents in maize (Zea mays L. single cross) were studied. With increasing Cd+2 and NaCl alone to Hogland nutrient solution, the contents of chlorophyll (Chl) and starch content decreased. Interaction effect of salinity and cadmium caused decrease of negative effects of two stress and the results indicate that plants whose growth has been retarded by a mild level of one stress factor (in this case 25 and 50 mM NaCl) may become more tolerant to a second stress factor, (Cd). The addition of cadmium caused a partial elimination of salinity effects on roots and shoots and growth parameters, ions accumulation and photosynthetic parameters were improved at mild concentrations of two stresses.
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