Polyamines under Abiotic Stress: Metabolic Crossroads and Hormonal Crosstalks in Plants.

Marta Bitrián,Teresa Altabella,Rubén Alcázar,Antonio F Tiburcio,Xavier Zarza

doi:10.3390/metabo2030516

Abstract

Polyamines are essential compounds for cell survival and have key roles in plant stress protection. Current evidence points to the occurrence of intricate cross-talks between polyamines, stress hormones and other metabolic pathways required for their function. In this review we integrate the polyamine metabolic pathway in the context of its immediate metabolic network which is required to understand the multiple ways by which polyamines can maintain their homeostasis and participate in plant stress responses.

Highlights

Abiotic stresses such as cold/freezing, salinity, heat and drought represent serious threats to agriculture
Genetic and genomic approaches have revealed complex metabolic and hormonal networks which are coordinated to provide an optimal response to stress conditions
In this review we synthesize what is known about direct interactions of PAs with other metabolic pathways during the stress response

Summary

Introduction

Abiotic stresses such as cold/freezing, salinity, heat and drought represent serious threats to agriculture. Plants, which are sessile organisms, have evolved metabolic and hormonal pathways to cope with environmental challenges. The study of this natural evolution on stress responsiveness is providing new leads to crop protection. Genetic and genomic approaches have revealed complex metabolic and hormonal networks which are coordinated to provide an optimal response to stress conditions. Global transcriptional and metabolomic approaches very frequently recognize the participation of polyamines (PAs) in a large number of abiotic and biotic stresses. In this review we synthesize what is known about direct interactions of PAs with other metabolic pathways during the stress response. We discuss the dependence of PA responses on the stress hormone abscisic acid (ABA) during drought

Polyamine Biosynthesis and Its Interaction with Other Metabolic Pathways

Put to Spm Canalization and Its Contribution to Stress Protection

ABA Dependence of PA-Responses under Drought

Future Perspectives