期刊
PLANT SIGNALING & BEHAVIOR
卷 7, 期 9, 页码 1084-1087出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.21185
关键词
Hydroxyl radical; polyamines; plasma membrane; ion flux; ROS-induced conductance; Ca2+ pump and abiotic stress
资金
- CONACyT [CB 82913]
- ARC Discovery
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.
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