PHYSIOLOGY AND MOLECULAR BIOLOGY OF SALINITY STRESS TOLERANCE IN PLANTS

- ions and to some extent Cl - and SO 4 2 - of Mg 2+ and nutrient imbalance caused by excess of Na + and Cl - ions. Salinity stress response is multigenic, as a number of processes i n- volved in the tolerance mechanism are affected, such as var ious compatible solutes/osmolytes, polyamines, reactive oxygen species and antioxidant defence mecha- nism, ion transport and compartmentalization of inj u- rious ions. Various genes/cDNAs encoding proteins involved in the above-mentioned processes have been identified and isolated. The role of genes/cDNAs e n- coding proteins involved in regulating other genes/ pro- teins, signal transduction process involving hormones like ABA, JA and polyamines, and strategies to i…