Reactive oxygen species detoxification
nounPronunciation: /riˈæktɪv ˈɒksɪdʒən ˈspiːʃiːz dɪˈtɒksɪfɪˈkeɪʃən/
The enzymatic and non-enzymatic mechanisms by which plants neutralize harmful reactive oxygen species (ROS) including superoxide, hydrogen peroxide, and hydroxyl radicals generated during stress. Key enzymes include superoxide dismutase, catalase, and peroxidases that convert ROS to harmless byproducts.
Plain English
The process where plants use special enzymes to break down dangerous oxygen molecules produced during stress.
Etymology & History
Usage
"Enhanced reactive oxygen species detoxification through upregulation of antioxidant enzymes conferred heat tolerance in transgenic tomato plants."
Style guide notes: Use 'ROS detoxification' as shorthand only after establishing full term; always specify ROS types when clarity is needed.
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Related Terms
Frequently Asked Questions
Which enzymes are most important for ROS detoxification?
Superoxide dismutase, catalase, and peroxidases are primary enzymes; glutathione reductase assists in reducing oxidized compounds.
How do non-enzymatic antioxidants help?
Ascorbate, glutathione, and carotenoids directly scavenge ROS and regenerate oxidized enzymatic antioxidants.
Why Test Candidates on This?
Core topic in stress physiology and genetic improvement studies evaluating oxidative stress tolerance.
Required skill level: Mid