Turgor pressure deficit
nounPronunciation: /ˈtɜrɡər ˈprɛʃər ˈdɛfɪsɪt/
The reduction in cellular hydrostatic pressure that occurs when plant cells lose water under stress conditions, compromising structural rigidity and cellular functions. This deficit directly impacts cell expansion, photosynthetic capacity, and overall plant growth under drought or osmotic stress.
Plain English
The loss of water pressure inside plant cells that makes them weaker and less able to grow during drought stress.
Etymology & History
Usage
"The turgor pressure deficit observed in drought-stressed leaves directly correlated with reduced photosynthetic rates."
Style guide notes: Always specify the environmental condition causing the deficit for clarity.
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Frequently Asked Questions
How does turgor pressure deficit affect plant growth?
It reduces cell expansion and photosynthetic capacity, limiting overall biomass accumulation under drought stress.
What causes turgor pressure deficit to occur?
Water loss from cells due to drought, salinity, or osmotic stress reduces internal hydrostatic pressure.
Why Test Candidates on This?
Essential for understanding plant responses to drought and evaluating stress tolerance mechanisms.
Required skill level: Mid