Iron status of plants is critical to its uptake and compartmentalization. There is growing evidence to show that iron plays a homeostatic role to ward against abiotic stresses. Cloning of genes encoding enzymes of the antioxidant system (Fe-SOD, APX) and their overexpression in transgenics has been shown to enhance tolerance to oxidative stress (Slater et al. 2003). O verexpression of choline monooxygenase, a cytochrome P450 monooxygenase, offers osmoprotection against salt and temperature stress.