Possible Regulatory Effect of Lipid Peroxidation on the H+-ATPase Activity of the Plasmalemma under Stress Conditions

Possible Regulatory Effect of Lipid Peroxidation on the H+-ATPase Activity of the Plasmalemma... We studied the effects of high temperature and paraquat on the rate of lipid peroxidation and activity of the H+-ATPase in the plasmalemma fraction isolated from pea leaves. We demonstrated a heat-induced increase in both indices. When lipid-peroxidation was inhibited by pretreatment with butylated hydroxytoluene, a synthetic antioxidant, the H+-ATPase activity increased to a lesser extent than after heat shock without pretreatment. Treatment of plants with paraquat, a prooxidant causing an oxidative stress, resulted in a dramatic increase in lipid peroxidation and H+-ATPase activity. We suggested that the enhanced lipid peroxidation could be one of the causes for the H+-ATPase activation in the plasmalemma under stress conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Possible Regulatory Effect of Lipid Peroxidation on the H+-ATPase Activity of the Plasmalemma under Stress Conditions

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1015540918588
Publisher site
See Article on Publisher Site

Abstract

We studied the effects of high temperature and paraquat on the rate of lipid peroxidation and activity of the H+-ATPase in the plasmalemma fraction isolated from pea leaves. We demonstrated a heat-induced increase in both indices. When lipid-peroxidation was inhibited by pretreatment with butylated hydroxytoluene, a synthetic antioxidant, the H+-ATPase activity increased to a lesser extent than after heat shock without pretreatment. Treatment of plants with paraquat, a prooxidant causing an oxidative stress, resulted in a dramatic increase in lipid peroxidation and H+-ATPase activity. We suggested that the enhanced lipid peroxidation could be one of the causes for the H+-ATPase activation in the plasmalemma under stress conditions.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 13, 2004

References

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