Role of polyamine metabolism in plant pathogen interactions

Abstract

Polyamines are aliphatic amines found in all living cells, and they are necessary for several fundamental cell processes. Their protective role against various abiotic stress factors has been reported in different plant species, while the mechanism by which polyamines act during plantmicrobe interaction is still poorly understood. The several types of the interactions between the plants and the microbes outline a divers and complex picture of the action mechanisms. The present review focuses on this aspect of the mode of action of polyamines and polyamine metabolism during biotroph and necrotroph interactions between plants and pathogens. It seems that apoplastic metabolism of polyamines of the host and the accumulation of H2O2 as a result of polyamine catabolism play important signalling role in plant-pathogen interactions. The manipulation of the members of the polyamine-induced signalling pathways could increase the host plant resistance to biotic stresses.

Endogenous Polyamines and Ethylene Biosynthesis in Relation to Germination of Osmoprimed Brassica napus Seeds under Salt Stress

“…In the present study, higher levels of free Put accumulation was noticed in primed seeds under both stress and control conditions and in unprimed seeds under salt stress ( Figure 2 A). The protective effect of Put under stress conditions due to the maintenance of redox homeostasis through the H 2 O 2 signaling pathway was proposed for several biotic and abiotic stresses [ 30 , 33 , 70 ]. The accumulation of hydrogen peroxide was observed during the germination of primed and unprimed seeds under both control and stress conditions [ 26 ].…”