Cold Acclimation in Plants: Relationship Between the Lipid Composition and the Cryostability of the Plasma Membrane

1999 ◽  
Vol 112 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Matsuo Uemura ◽  
Peter L Steponkus
Keyword(s):  
Plasma Membrane ◽  
Cold Acclimation ◽  
Lipid Composition

Alterations in the lipid composition of the plasma membrane of rye leaves following cold acclimation

Cryobiology ◽  
1986 ◽  
Vol 23 (6) ◽  
pp. 544-545 ◽  
Author(s):  
Daniel V. Lynch ◽  
Xenia K. Young ◽  
Peter L. Steponkus
Keyword(s):  
Plasma Membrane ◽  
Cold Acclimation ◽  
Lipid Composition

The influence of cold acclimation on the lipid composition and cryobehaviour of the plasma membrane of isolated rye protoplasts

1990 ◽  
Vol 326 (1237) ◽  
pp. 571-583 ◽  
Keyword(s):  
Plasma Membrane ◽  
Phase Transitions ◽  
Cold Acclimation ◽  
Lipid Composition ◽  
Membrane Lipids ◽  
Freezing Injury ◽  
Lipid Species ◽  
Differential Behaviour ◽  
Cell Dehydration ◽  
Osmotic Contraction

Destabilization of the plasma membrane, which is a primary cause of freezing injury, is a consequence of freeze-induced osmotic stresses and cell dehydration. However, the mechanism of injury depends on the magnitude of the osmotic stress and the extent of cell dehydration. Over the range of 0 to — 5 °C, destabilization of the plasma membrane in protoplasts isolated from non-acclimated rye leaves is a result of osmotic excursions, because freeze-induced osmotic contraction results in endocytotic vesiculation of the plasma membrane and sufficiently large area reductions are irreversible. At lower temperatures, the protoplasts are subjected to extremely large osmotic pressures ( — 12 MPa at —10 °C), and there are several changes in the ultrastructure of the plasma membrane, including the formation of aparticulate domains and lamellar- to hexagonaln-phase transitions. These changes, which are manifestations of demixing of the membrane components, are predicted by a theory of bilayer interactions at low levels of hydration. During cold acclimation, the cryobehaviour of the plasma membrane is altered; osmotic contraction results in the reversible formation of exocytotic extrusions and the propensity for dehydration-induced demixing and lamellar- to hexagonaln-phase transitions is decreased. In both cases, the differential behaviour is also observed in liposomes prepared from plasma membrane lipids isolated from non-acclimated and cold-acclimated leaves. However, as no lipid species are unique to the plasma membrane of either non-acclimated or cold-acclimated leaves, the differential behaviour is caused by altered lipid-lipid interactions because of different proportions of the lipid species. Hence the behaviour of the plasma membrane can be altered by using a protoplast-liposome fusion procedure to selectively modify the lipid composition of the plasma membrane. These studies provide direct evidence that the increased cryostability of the plasma membrane is a consequence of alterations in its lipid composition.

Dietary fat ratios and liver plasma membrane lipid composition

Lipids ◽  
1988 ◽  
Vol 23 (9) ◽  
pp. 829-833 ◽  
Author(s):  
Michael W. Hamm ◽  
Anna Sekowski ◽  
Roni Ephrat
Keyword(s):  
Plasma Membrane ◽  
Lipid Composition ◽  
Dietary Fat ◽  
Membrane Lipid ◽  
Membrane Lipid Composition ◽  
Liver Plasma Membrane ◽  
Plasma Membrane Lipid

Characterization and lipid composition of the plasma membrane in grape leaves

1994 ◽  
Vol 35 (5) ◽  
pp. 1249-1253 ◽  
Author(s):  
Alberto Mas ◽  
Jose Navarro-Pedreño ◽  
David T. Cooke ◽  
Carolyn S. James
Keyword(s):  
Plasma Membrane ◽  
Lipid Composition
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