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Current Protein & Peptide Science

Editor-in-Chief

ISSN (Print): 1389-2037
ISSN (Online): 1875-5550

Review Article

Pathogenesis Related Proteins (PRs): From Cellular Mechanisms to Plant Defense

Author(s): Ikram Zribi, Mouna Ghorbel and Faiçal Brini*

Volume 22 , Issue 5 , 2021

Published on: 31 December, 2020

Page: [396 - 412] Pages: 17

DOI: 10.2174/1389203721999201231212736

Price: $65

Abstract

Many unfavorable stress conditions, such as wounding, drought, extreme temperatures, salinity and pathogen attacks, control growth, development and plant yield. To survive in such environments, plants have developed many strategies. They are able to induce the expression of a large number of genes that encode effectors, receptors, as well as signaling proteins and protective molecules. Among all, pathogenesis-related proteins (PRs) were found to be activated in response to different biotic and abiotic threats. Those proteins have a wide range of functions; acting as chitinases, peroxidases, anti-microbial agents, hydrolases, protease inhibitors, and other activities. Activation of PR proteins has been demonstrated in different plant families as a response to different stresses. In this review, we have summarized the structural, biological and functional characteristics of the different PRs families in plants, their regulation, as well as their roles in plant defense against abiotic and biotic stresses.

Keywords: Abiotic and biotic stress, plant defense, PR proteins, SA, stress signaling, transgenic plants.

Graphical Abstract

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