membrane lipid saturation
nounPronunciation: /məmˈbreɪn ˈlɪpɪd ˌsætʃəˈreɪʃən/
The degree to which phospholipids and glycolipids in cell membranes contain saturated versus unsaturated fatty acids, affecting membrane fluidity and stability under temperature stress. Higher saturation ratios reduce membrane fluidity and protect against cold-induced rigidity, while unsaturated lipids maintain flexibility at warm temperatures.
Plain English
The composition of fats in cell membranes that determines how flexible or stiff they become at different temperatures.
Etymology & History
Usage
"Membrane lipid saturation increased in cold-acclimated pines to maintain cellular function at subzero temperatures."
Style guide notes: Be specific about saturation ratio or percentage when quantifying in research contexts.
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Frequently Asked Questions
Why is membrane lipid saturation important for temperature stress?
It determines membrane rigidity or fluidity, which directly affects protein function and cell survival at extreme temperatures.
How do plants adjust membrane lipid saturation?
Plants regulate desaturase enzyme activity to increase or decrease unsaturated fatty acid proportions in membranes.
Why Test Candidates on This?
Relevant for specialized research on molecular mechanisms of temperature stress adaptation in plants.
Required skill level: Expert