Dehydration avoidance
nounPronunciation: /ˌdiːhaɪˈdreɪʃən əˈveɪdəns/
A plant strategy involving morphological and physiological traits that reduce water loss or maintain water uptake, thereby postponing cellular dehydration during drought stress. This mechanism includes reduced leaf area, altered root architecture, and stomatal regulation to minimize water deficit exposure.
Plain English
Plants reduce water loss through structural changes and controlled water use to delay drying out during drought.
Etymology & History
Usage
"Dehydration avoidance through leaf rolling and increased root depth enabled sorghum to maintain productivity in semi-arid regions."
Style guide notes: Distinguish clearly from 'dehydration tolerance' as they represent opposite physiological strategies in abiotic stress contexts.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What is the difference between dehydration avoidance and tolerance?
Avoidance prevents water loss; tolerance allows low water status while maintaining function.
Which crops use dehydration avoidance as primary strategy?
Cereals like wheat and sorghum employ avoidance through deep roots and leaf rolling mechanisms.
Why Test Candidates on This?
Critical for understanding crop adaptation strategies and screening germplasm for drought-prone environments.
Required skill level: Mid