Wheat seedlings were grown hydroponically in the presence of 50 μM Cu2+. The copper stress resulted in plasma-membrane (PM) changes of the root cells as altered lipid composition, a decreased phosphatidylcholine (PC)/phosphatidylethanolamine (PE) ratio from 0.7 to 0.3, a decreased fatty acyl unsaturation and a decrease in the lipid/protein ratio. Membrane vesicles made from total lipid extracts of isolated PMs of wheat grown under copper excess showed a remarkably low permeability to polar molecules like glucose, as compared with the control, and no difference in proton permeability. Permeability studies of vesicles of plasma-membrane lipids, which were selectively modified by addition of specific lipids such as PC and PE, were also performed. The results are discussed with emphasis on the role of the increased PE proportion.
Skip Nav Destination
Article navigation
December 2000
-
Cover Image
Cover Image
- PDF Icon PDF LinkFront Matter
- PDF Icon PDF LinkTable of Contents
- PDF Icon PDF LinkAdvertising
Conference Article|
December 01 2000
Changes in plasma-membrane lipid composition: a strategy for acclimation to copper stress
A. H. Berglund;
A. H. Berglund
1
*Botanical Institute, Department of Plant Physiology, Göteborg University, S-40530 Göteborg, Sweden
1To whom correspondence should be addressed (e-mail anna.berglund@fysbot.gu.se)
Search for other works by this author on:
M. F. Quartacci;
M. F. Quartacci
†Dipartimento di Chimica e Biotecnologie Agrarie, Università di Pisa, 1-56124 Pisa, Italy
Search for other works by this author on:
C. Liljenberg
C. Liljenberg
*Botanical Institute, Department of Plant Physiology, Göteborg University, S-40530 Göteborg, Sweden
Search for other works by this author on:
Publisher: Portland Press Ltd
Received:
June 26 2000
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2000 Biochemical Society
2000
Biochem Soc Trans (2000) 28 (6): 905–907.
Article history
Received:
June 26 2000
Citation
A. H. Berglund, M. F. Quartacci, C. Liljenberg; Changes in plasma-membrane lipid composition: a strategy for acclimation to copper stress. Biochem Soc Trans 1 December 2000; 28 (6): 905–907. doi: https://doi.org/10.1042/bst0280905
Download citation file:
Sign in
Don't already have an account? Register
Sign in to your personal account
You could not be signed in. Please check your email address / username and password and try again.
Captcha Validation Error. Please try again.