Reactive oxygen species (ROS) scavenging
nounPronunciation: /riˈæktɪv ˈɒksɪdʒən ˈspiːʃiːz ˈskævendʒɪŋ/
The enzymatic and non-enzymatic removal of harmful free radicals produced during abiotic stress, protecting cellular components from oxidative damage. This process involves antioxidant systems including catalase, superoxide dismutase, and phenolic compounds.
Plain English
The plant's natural defense mechanism that removes damaging free radical molecules produced under stress conditions.
Etymology & History
Usage
"Enhanced ROS scavenging capacity is a key indicator of stress tolerance in transgenic crop varieties."
Style guide notes: Distinguish between enzymatic and non-enzymatic scavenging mechanisms when describing specific defense systems.
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Related Terms
Frequently Asked Questions
Which enzymes are most important for ROS scavenging in stressed plants?
Catalase, superoxide dismutase, peroxidase, and glutathione reductase are primary ROS-scavenging enzymes.
How does ROS scavenging relate to plant stress tolerance?
Strong ROS scavenging capacity prevents cellular damage, allowing plants to withstand prolonged stress exposure.
Why Test Candidates on This?
Critical for evaluating stress tolerance mechanisms and predicting crop performance under environmental extremes.
Required skill level: Mid