Arabidopsis requires polyunsaturated lipids for low-temperature survival.
- 1 July 1993
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 90 (13), 6208-6212
- https://doi.org/10.1073/pnas.90.13.6208
Abstract
Mutants of Arabidopsis that contain reduced levels of polyunsaturated fatty acids showed growth characteristics at 22 degrees C that were very similar to wild type. By contrast, at 12 degrees C, the mutants failed to undergo stem elongation during reproductive growth although they produced normal flowers and fertile seeds. After transfer to 6 degrees C, rosette leaves of the mutants gradually died, and the plants were inviable. These different responses of the mutant plants at 12 degrees C and 6 degrees C suggest that distinct functions may be affected at these two temperatures. The gradual development of symptoms at 6 degrees C and other lines of evidence argue against a general collapse of membrane integrity as the cause of the lethal phenotype. Rather, they indicate that the decrease in polyunsaturated membrane lipids may initially have relatively limited effects in disrupting cellular function.Keywords
This publication has 17 references indexed in Scilit:
- Map-Based Cloning of a Gene Controlling Omega-3 Fatty Acid Desaturation in ArabidopsisScience, 1992
- Unsaturation of fatty acids in membrane lipids enhances tolerance of the cyanobacterium Synechocystis PCC6803 to low-temperature photoinhibition.Proceedings of the National Academy of Sciences of the United States of America, 1992
- A Role for Membrane Lipid Polyunsaturation in Chloroplast Biogenesis at Low TemperaturePlant Physiology, 1992
- Arabidopsis mutants deficient in polyunsaturated fatty acid synthesis. Biochemical and genetic characterization of a plant oleoyl-phosphatidylcholine desaturase.Journal of Biological Chemistry, 1992
- Plant Lipids: Metabolism, Mutants, and MembranesScience, 1991
- Stearoyl-acyl-carrier-protein desaturase from higher plants is structurally unrelated to the animal and fungal homologs.Proceedings of the National Academy of Sciences of the United States of America, 1991
- Cold Acclimation in Arabidopsis thalianaPlant Physiology, 1988
- CELL-SURFACE ANCHORING OF PROTEINS VIA GLYCOSYL-PHOSPHATIDYLINOSITOL STRUCTURESAnnual Review of Biochemistry, 1988
- Isolation and function of spinach leaf β-ketoacyl-[acyl-carrier-protein] synthasesProceedings of the National Academy of Sciences of the United States of America, 1982
- The role of chloroplasts and microsomal fractions in polar-lipid synthesis from [1-14C]acetate by cell-free preparations from spinach (Spinacia oleracea) leavesBiochemical Journal, 1980