Oxidative stress index
noun phrasePronunciation: /ɒkˈsɪdeɪtɪv ˈstrɛs ˈɪndɛks/
A quantitative measurement of the balance between reactive oxygen species (ROS) production and antioxidant defense capacity in plant tissues. It integrates multiple markers including hydrogen peroxide levels, lipid peroxidation, and protein oxidation to assess cellular damage severity.
Plain English
A numerical score measuring the damaging effects of unstable oxygen molecules versus a plant's defense systems.
Etymology & History
Usage
"The oxidative stress index increased threefold in wheat seedlings exposed to combined heat and drought."
Style guide notes: Specify which ROS markers and antioxidant parameters were included when reporting oxidative stress index values.
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Frequently Asked Questions
What parameters comprise an oxidative stress index?
Typically includes malondialdehyde content, hydrogen peroxide levels, protein carbonyls, and antioxidant enzyme activity ratios.
Why is oxidative stress index important in crop research?
It predicts crop damage and yield loss under stress conditions better than single stress markers alone.
Why Test Candidates on This?
Commonly assessed in abiotic stress research for evaluating plant tolerance mechanisms and screening genotypes for stress resilience.
Required skill level: Mid