Evolutionary adaptation of membranes to temperature.
The "fluidity" of brain synaptosomal membrane preparations of arctic and hot-springs fish species, two temperature water fish species acclimated to different seasonal temperatures, and two mammals was estimated using the fluorescence polarization technique. At all measurement temperatures,...
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ftpubmed:oai:pubmedcentral.nih.gov:392479 2023-05-15T14:56:08+02:00 Evolutionary adaptation of membranes to temperature. Cossins, A R Prosser, C L 1978-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC392479 http://www.ncbi.nlm.nih.gov/pubmed/273929 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC392479 http://www.ncbi.nlm.nih.gov/pubmed/273929 Research Article Text 1978 ftpubmed 2013-08-29T22:49:05Z The "fluidity" of brain synaptosomal membrane preparations of arctic and hot-springs fish species, two temperature water fish species acclimated to different seasonal temperatures, and two mammals was estimated using the fluorescence polarization technique. At all measurement temperatures, the fluidity decreased in the order: arctic sculpin, 5 degrees-acclimated goldfish, 25 degrees-acclimated goldfish, desert pupfish, and rat. This correlated with increasing adaptation or body (i.e., cellular) temperatures of 0 degrees, 5 degrees, 25 degrees, 34 degrees, and 37 degrees and suggested a partial compensation of membrane fluidity for environmental temperature that occurs over the evolutionary time period as well as during laboratory (seasonal) acclimation. Evolutionary adaptation of relatively stenothermal species to constant thermal environments resulted in a more complete compensation than laboratory (seasonal) acclimation. Each compensation is accompanied by differences in the saturation of membrane phosphoglycerides. At increased cellular temperatures the proportion of saturated fatty acids increased and the unsaturation index decreased; the correlation between these indices and the measured expression of membrane dynamic structure was highly significant. It is concluded that the homeoviscous compensation of synaptic membrane function is an important component of temperature adaptation. Text Arctic PubMed Central (PMC) Arctic |
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Research Article Cossins, A R Prosser, C L Evolutionary adaptation of membranes to temperature. |
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Research Article |
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The "fluidity" of brain synaptosomal membrane preparations of arctic and hot-springs fish species, two temperature water fish species acclimated to different seasonal temperatures, and two mammals was estimated using the fluorescence polarization technique. At all measurement temperatures, the fluidity decreased in the order: arctic sculpin, 5 degrees-acclimated goldfish, 25 degrees-acclimated goldfish, desert pupfish, and rat. This correlated with increasing adaptation or body (i.e., cellular) temperatures of 0 degrees, 5 degrees, 25 degrees, 34 degrees, and 37 degrees and suggested a partial compensation of membrane fluidity for environmental temperature that occurs over the evolutionary time period as well as during laboratory (seasonal) acclimation. Evolutionary adaptation of relatively stenothermal species to constant thermal environments resulted in a more complete compensation than laboratory (seasonal) acclimation. Each compensation is accompanied by differences in the saturation of membrane phosphoglycerides. At increased cellular temperatures the proportion of saturated fatty acids increased and the unsaturation index decreased; the correlation between these indices and the measured expression of membrane dynamic structure was highly significant. It is concluded that the homeoviscous compensation of synaptic membrane function is an important component of temperature adaptation. |
format |
Text |
author |
Cossins, A R Prosser, C L |
author_facet |
Cossins, A R Prosser, C L |
author_sort |
Cossins, A R |
title |
Evolutionary adaptation of membranes to temperature. |
title_short |
Evolutionary adaptation of membranes to temperature. |
title_full |
Evolutionary adaptation of membranes to temperature. |
title_fullStr |
Evolutionary adaptation of membranes to temperature. |
title_full_unstemmed |
Evolutionary adaptation of membranes to temperature. |
title_sort |
evolutionary adaptation of membranes to temperature. |
publishDate |
1978 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC392479 http://www.ncbi.nlm.nih.gov/pubmed/273929 |
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Arctic |
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Arctic |
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Arctic |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC392479 http://www.ncbi.nlm.nih.gov/pubmed/273929 |
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1766328168025686016 |