Reactive Oxygen Species Accumulation
noun phrasePronunciation: /riˈæktɪv ˈɒksɪdʒən ˈspiːʃiz əˌkjuːmjəˈleɪʃən/
The buildup of unstable oxygen-containing molecules such as superoxide radicals and hydrogen peroxide in plant cells under abiotic stress conditions. These molecules cause oxidative damage to cellular components including lipids, proteins, and nucleic acids.
Plain English
Plants produce harmful oxygen molecules during stress that can damage their cells.
Etymology & History
Usage
"Reactive oxygen species accumulation is a primary mechanism underlying heat stress-induced crop yield reduction."
Style guide notes: Use 'ROS accumulation' as acceptable shorthand in technical contexts; maintain 'reactive oxygen species' in formal publications.
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Related Terms
Frequently Asked Questions
What are reactive oxygen species in plants?
ROS are unstable oxygen molecules produced during stress that damage cellular structures and proteins in plant cells.
How do plants manage ROS accumulation?
Plants use antioxidant enzymes like catalase and superoxide dismutase to neutralize harmful reactive oxygen species.
Why Test Candidates on This?
Essential for understanding stress physiology and evaluating crop resilience mechanisms.
Required skill level: Mid