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BioMed Research International
Volume 2014, Article ID 239621, 9 pages
http://dx.doi.org/10.1155/2014/239621
Review Article

Recent Advances in Polyamine Metabolism and Abiotic Stress Tolerance

Division of Genomic Resources, National Bureau of Plant Genetic Resources, New Delhi 110012, India

Received 23 April 2014; Revised 3 June 2014; Accepted 16 June 2014; Published 20 July 2014

Academic Editor: Lam-Son Tran

Copyright © 2014 Parimalan Rangan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Global warming is an alarming problem in agriculture and its effect on yield loss has been estimated to be five per cent for every degree centigrade rise in temperature. Plants exhibit multiple mechanisms like optimizing signaling pathway, involvement of secondary messengers, production of biomolecules specifically in response to stress, modulation of various metabolic networks in accordance with stress, and so forth, in order to overcome abiotic stress factors. Many structural genes and networks of pathway were identified and reported in plant systems for abiotic stress tolerance. One such crucial metabolic pathway that is involved in normal physiological function and also gets modulated during stress to impart tolerance is polyamine metabolic pathway. Besides the role of structural genes, it is also important to know the mechanism by which these structural genes are regulated during stress. Present review highlights polyamine biosynthesis, catabolism, and its role in abiotic stress tolerance with special reference to plant systems. Additionally, a system based approach is discussed as a potential strategy to dissect the existing variation in crop species in unraveling the interacting regulatory components/genetic determinants related to PAs mediated abiotic stress tolerance.