Drought stress index
nounPronunciation: /ˈdraʊt ˈstrɛs ˈɪndɛks/
A quantitative measure combining multiple physiological parameters to assess plant water deficit severity. It integrates leaf water potential, relative water content, and transpiration rates into a single comparative metric.
Plain English
A numerical score that measures how severely drought affects a plant by combining water-related measurements.
Etymology & History
Usage
"The drought stress index revealed that drought-resistant cultivars maintained higher water status during the experimental period."
Style guide notes: Capitalize 'Drought Stress Index' when referring to specific published indices; use lowercase for general references.
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Contrasted with
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Frequently Asked Questions
What parameters does a drought stress index typically measure?
Leaf water potential, relative water content, transpiration rates, and sometimes stomatal conductance are commonly integrated.
Why use a drought stress index instead of single measurements?
It provides comprehensive assessment of drought impact by combining multiple indicators into one standardized, comparable value.
Why Test Candidates on This?
Frequently assessed in plant physiology and crop stress management examinations to evaluate drought response evaluation skills.
Required skill level: Mid