Antioxidant Enzyme Activity Profile
nounPronunciation: /ˌæntiˈɑksɪdənt ˈɛnzaɪm ækˈtɪvɪti ˈproʊfaɪl/
The comprehensive measurement of multiple antioxidant enzymatic activities including superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX) that collectively protect plant cells from reactive oxygen species damage. This profile reflects the plant's oxidative stress defense capacity and stress tolerance status.
Plain English
The combined levels of protective enzymes that plants use to neutralize harmful oxidative molecules produced during stress.
Etymology & History
Usage
"The antioxidant enzyme activity profile revealed elevated SOD and CAT levels in salt-tolerant plants compared to sensitive genotypes."
Style guide notes: Report enzyme activities as specific activity (units per mg protein) with clear methodology for enzyme extraction and assay conditions.
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Frequently Asked Questions
What are the three main antioxidant enzymes measured?
Superoxide dismutase (SOD) converts superoxide radicals, catalase degrades hydrogen peroxide, peroxidase reduces other peroxides.
How do antioxidant enzyme activities change under stress?
Stress-tolerant plants show rapid and sustained increases in antioxidant enzyme activities, while sensitive plants show delayed or minimal responses.
Why Test Candidates on This?
Widely used to evaluate stress tolerance and select superior genotypes in plant breeding and physiology research.
Required skill level: Mid