Lipid peroxidation
noun phrasePronunciation: /ˈlɪpɪd ˌpɛrɒksɪˈdeɪʃən/
The oxidative breakdown of polyunsaturated lipids in cell membranes induced by reactive oxygen species, resulting in loss of membrane integrity and cellular function. Malondialdehyde (MDA) accumulation is commonly measured as an indicator of this damage.
Plain English
Oxidative damage to cell membranes caused by unstable oxygen molecules, measured through malondialdehyde levels.
Etymology & History
Usage
"Lipid peroxidation increased significantly in drought-exposed leaves, indicating severe oxidative damage to chloroplast and plasma membranes."
Style guide notes: Always specify the measured indicator (MDA or TBARS) when referencing lipid peroxidation levels; distinguish membrane compartments if relevant.
Also known as
Contrasted with
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Frequently Asked Questions
What triggers lipid peroxidation in stressed plants?
Excessive ROS production during abiotic stress attacks polyunsaturated lipids in cell membranes, initiating cascade reactions that damage membrane structure.
How is lipid peroxidation measured in research?
Lipid peroxidation is primarily measured by quantifying malondialdehyde (MDA) content using the thiobarbituric acid-reactive substances assay.
Why Test Candidates on This?
Lipid peroxidation is a standard biomarker for assessing abiotic stress severity and cellular damage in plant tissues.
Required skill level: Mid