Effect of Cold Acclimation on Membrane Lipid Composition and Freeze-Induced Membrane Destablization
Freezing injury is primarily a consequence of membrane destabilization resulting from freeze-induced dehydration (Steponkus, 1984). Although all cellular membranes are vulnerable to freeze-induced destabilization, the plasma membrane is of primary importance because of the critical role it plays during a freeze/thaw cycle. The plasma membrane is the principal interface between the extracellular medium and the cytoplasm and acts as a semipermeable barrier allowing for the efflux/influx of water during a freeze/ thaw cycle. In addition, the plasma membrane prevents seeding of the intracellular solution by extracellular ice. Thus, whether the cell survives during a freeze/thaw cycle is ultimately a consequence of the stability of the plasma membrane.
KeywordsCold Acclimation Freezing Tolerance Plasma Membrane Lipid Membrane Lipid Composition Chloroplast Envelope
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