Role of Polyamines in Regulating Abiotic Stress Tolerance in Agricultural Crops: A Review

At present plants had to face adverse climatic fluctuations which are often detrimental for their growth in order to cope up with this situation, they develop certain adaptive tactics like synthesis of new proteins, micro RNAs, compatible solutes/ osmolites and radical release to avoid its adverse effects. Of these study on compatible solutes such as polyamines (PAs) gained popularity among researchers. In plant, they are involved in a wide variety of regulatory and cellular processes under normal conditions. During these stresses they acts by activating biosynthesis of signaling molecules like NO, H2O2; affects abscisic acid synthesis; Ca2+ homeostasis; ion channel signaling or even apoptosis in severe conditions. Over expression of PAs is reported in various stresses due to the presence of stress-responsive elements in the promoters of PA biosynthetic genes. This review paper, summarizes the effect of polyamines in boosting plants growth during abiotic stress and its mechanisms of action.