Antioxidant enzyme complex
noun phrasePronunciation: /ˌæntiˈɒksɪdənt ˈenzaɪm ˈkɒmpleks/
A coordinated system of catalytic proteins including superoxide dismutase, catalase, and peroxidases that neutralize harmful free radicals produced during abiotic stress. This enzymatic network protects cellular components from oxidative damage.
Plain English
A group of protective enzymes that work together to remove harmful free radicals from stressed plant cells.
Etymology & History
Usage
"Heat stress upregulated the antioxidant enzyme complex, preventing membrane peroxidation."
Style guide notes: Distinguish between enzymatic and non-enzymatic antioxidant defenses in stress responses.
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Frequently Asked Questions
Which enzymes are included in the antioxidant enzyme complex?
Superoxide dismutase, catalase, and peroxidases are primary components protecting plants.
Why is this complex critical under abiotic stress?
It prevents oxidative damage to proteins, lipids, and DNA caused by reactive oxygen accumulation.
Why Test Candidates on This?
Essential for understanding oxidative stress mechanisms and plant defense responses in abiotic stress assessments.
Required skill level: Mid