Polyamines: Metabolism and Role in Abiotic Stress Amelioration

By : Alfiya Bohra, Dheera Sanadhya, H.S. Bhatia

Page No: 183-195

Abstract
Polyamines (PAs), Putrescine (Put), Spermidine (Spd) and Spermine (Spm) are small aliphatic amines that are widespread in living organisms. PA metabolism in higher plants is involved in both abiotic and biotic stresses. These are involved in many physiological processes, such as cell growth and development and also respond to diverse abiotic stress. This review, focus on the correlation between endogenous PA titers and physiological perturbations along with the protective role of various analogues of PAs against abiotic stresses. Polyamines level shifts in different ways depending on several factors, such as plant species, tolerance or sensitivity to stress, and duration of stress. Exogenously supplied PAs protects plants from abiotic stress, whereas transgenic plants overexpressing PA biosynthetic genes exhibited stress tolerance. On the other hand, loss-of-function mutant of PA biosynthetic genes, or decrease of PA titers, reported to decrease stress tolerance.

Authors :
Alfiya Bohra : Ph.D Scholar, School of Life Sciences, Jaipur National University, Jaipur
Dheera Sanadhya : Associate Professor School of Life Sciences, Jaipur National University, Jaipur, Rajasthan, India
D.S. Bhatia : Director, School of Life Sciences, Jaipur National University, Jaipur, Rajasthan, India