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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
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: | 73 |
| Deposited By: | Tasmanian Institute of Agriculture |
| Deposited On: | 2014-07-09 |
| Last Modified: | 2017-11-07 |
| Downloads: | 0 |
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