transpiration rate suppression
noun phrasePronunciation: /trænspɪˈreɪʃən reɪt səˈpreʃən/
The reduction in water vapor loss through plant leaves in response to stress conditions, mediated primarily by abscisic acid-induced stomatal closure. This physiological adjustment minimizes water loss while sacrificing photosynthetic capacity during unfavorable environmental conditions.
Plain English
The decrease in water loss from plant leaves when under stress, achieved mainly through closing stomata to conserve water.
Etymology & History
Usage
"Severe heat stress triggers transpiration rate suppression in wheat cultivars as an adaptive mechanism to prevent desiccation."
Style guide notes: Always specify the trigger (heat, drought) when discussing transpiration rate suppression for clarity.
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Contrasted with
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Frequently Asked Questions
Why do plants suppress transpiration under stress?
To conserve limited water availability and prevent cellular dehydration, prioritizing survival over growth and photosynthesis.
What hormone controls transpiration rate suppression?
Abscisic acid (ABA) is the primary hormone signaling stomatal closure and reducing water vapor loss during abiotic stress.
Why Test Candidates on This?
Core concept in crop physiology and climate stress adaptation research evaluations.
Required skill level: Mid