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Cross-talk between reactive oxygen species and polyamines in regulation of ion transport across the plasma membrane: implications for plant adaptive responses

Citation

Pottosin, I and Velarde-Buendia, AM and Bose, J and Zepeda-Jazo, I and Shabala, S and Dobrovinskaya, O, Cross-talk between reactive oxygen species and polyamines in regulation of ion transport across the plasma membrane: implications for plant adaptive responses, Journal of Experimental Botany, 65, (5) pp. 1271-1283. ISSN 0022-0957 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 The Author

DOI: doi:10.1093/jxb/ert423

Abstract

Many stresses are associated with increased accumulation of reactive oxygen species (ROS) and polyamines (PAs). PAs act as ROS scavengers, but export of putrescine and/or PAs to the apoplast and their catabolization by amine oxidases gives rise to H2O2 and other ROS, including hydroxyl radicals (OH). PA catabolization-based signalling in apoplast is implemented in plant development and programmed cell death and in plant responses to a variety of biotic and abiotic stresses. Central to ROS signalling is the induction of Ca2+ influx across the plasma membrane. Different ion conductances may be activated, depending on ROS, plant species, and tissue. Both H2O2 and OH can activate hyperpolarization-activated Ca2+-permeable channels. OH is also able to activate both outward K+ current and weakly voltage-dependent conductance (ROSIC), with a variable cation-to-anion selectivity and sensitive to a variety of cation and anion channel blockers. Unexpectedly, PAs potentiated OH-induced K+ efflux in vivo, as well as ROSIC in isolated protoplasts. This synergistic effect is restricted to the mature root zone and is more pronounced in salt-sensitive cultivars compared with salt-tolerant ones. ROS and PAs suppress the activity of some constitutively expressed K+ and non-selective cation channels. In addition, both OH and PAs activate plasma membrane Ca2+-ATPase and affect H+ pumping. Overall, OH and PAs may provoke a substantial remodelling of cation and anion conductance at the plasma membrane and affect Ca2+ signalling.

Item Details

Item Type:Refereed Article
Keywords:potassium, calcium, ROS, depolarization, abiotic stress, amine oxidase, apoplast, hydroxyl radical, hypersensitive response, ion channel, P-type ATPase, plasma membrane, polyamine, reactive oxygen species, root, stomata
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Pottosin, I (Professor Igor Pottosin)
Author:Bose, J (Dr Jayakumar Bose)
Author:Shabala, S (Professor Sergey Shabala)
ID Code:93065
Year Published:2014
Web of Science® Times Cited:58
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-07-09
Last Modified:2017-11-07
Downloads:0

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