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Synergism between polyamines and ROS in the induction of Ca2+ and K+ fluxes in roots


Pottosin, I and Velarde-Buendia, A-M and Zepeda-Jazo, I and Dobrovinskaya, O and Shabala, S, Synergism between polyamines and ROS in the induction of Ca2+ and K+ fluxes in roots, Plant Signaling & Behavior, 7, (9) pp. 1084-1087. ISSN 1559-2316 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 Landes Bioscience

DOI: doi:10.4161/psb.21185


Stress conditions cause increases in ROS and polyamines levels, which are not merely collateral. There is increasing evidence for the ROS participation in signaling as well as for polyamine protective roles under stress. Polyamines and ROS, respectively, inhibit cation channels and induce novel cation conductance in the plasma membrane. Our new results indicate that polyamines and OH also stimulate Ca2+ pumping across the root plasma membrane. Besides, polyamines potentiate the OH-induced non-selective current and respective passive K+ and Ca2+ fluxes. In roots this synergism, however, is restricted to the mature zone, whereas in the distal elongation zone only the Ca2+ pump activation is observed. Remodeling the plasma membrane ion conductance by OH and polyamines would impact K+ homeostasis and Ca2+ signaling under stress.

Item Details

Item Type:Refereed Article
Keywords:hydroxyl radical, polyamines, plasma membrane, ion flux, ROS-induced conductance, Ca2+ pump and abiotic stress
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Pottosin, I (Professor Igor Pottosin)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:80063
Year Published:2012
Web of Science® Times Cited:30
Deposited By:Agricultural Science
Deposited On:2012-10-19
Last Modified:2018-02-08

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