Cell membrane integrity
nounPronunciation: /sɛl ˈmɛmbreɪn ɪnˈtɛɡrɪti/
The structural and functional stability of plant cell plasma membranes and organellar membranes under stress, measured by electrolyte leakage or lipid peroxidation levels. Loss of membrane integrity indicates cellular damage and occurs when stress exceeds protective capacity.
Plain English
The ability of cell membranes to maintain their structure and control what enters and exits the cell during stress.
Etymology & History
Usage
"Cell membrane integrity assessed via electrolyte leakage tests revealed that cold-acclimated plants maintained better membrane stability than non-acclimated controls."
Style guide notes: Specify measurement method when reporting: electrolyte leakage percentage is standard for comparing stress tolerance.
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Frequently Asked Questions
How is cell membrane integrity measured in practice?
Using electrolyte leakage tests where damaged membranes release ions measured by electrical conductivity of tissue extracts.
What causes loss of membrane integrity?
Lipid peroxidation from ROS, protein denaturation, and membrane fluidization during extreme temperature, drought, or salinity stress.
Why Test Candidates on This?
Widely used screening parameter in stress tolerance evaluation and genotype selection programs.
Required skill level: Junior