ROS scavenging capacity
noun phrasePronunciation: /ɑːrˌoʊˈɛs ˈskævəndʒɪŋ kəˈpæsɪti/
The ability of plant cells to neutralize reactive oxygen species through enzymatic and non-enzymatic antioxidant systems, including superoxide dismutase, catalase, and glutathione peroxidase. This capacity determines cellular tolerance to oxidative stress generated by abiotic stressors.
Plain English
The plant's ability to break down harmful oxygen molecules produced during stress using protective enzymes and chemicals.
Etymology & History
Usage
"ROS scavenging capacity determines whether plants develop acclimation or succumb to oxidative damage during heat stress."
Style guide notes: Distinguish between enzymatic and non-enzymatic components when discussing comprehensive ROS scavenging capacity.
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Frequently Asked Questions
Why is ROS scavenging capacity essential during heat stress?
High temperatures increase ROS production exponentially, damaging proteins and lipids unless scavenging enzymes neutralize them quickly.
How can breeders select for improved ROS scavenging capacity?
Select genotypes with higher antioxidant enzyme activities and expression levels under controlled stress screening conditions.
Why Test Candidates on This?
Commonly assessed in stress physiology, plant biochemistry, and crop improvement programs evaluating stress tolerance mechanisms.
Required skill level: Mid