Turgor pressure decline
nounPronunciation: /ˈtɜrɡər ˈprɛʃər dɪˈklaɪn/
The reduction in cellular hydrostatic pressure that maintains plant cell rigidity and structural integrity during water deficit conditions. This decline directly compromises cell expansion, growth processes, and overall plant mechanical strength.
Plain English
The loss of water pressure inside plant cells that causes wilting and reduced plant stiffness during drought.
Etymology & History
Usage
"Turgor pressure decline was observed in drought-stressed wheat cultivars within 48 hours of water withholding."
Style guide notes: Always specify 'cell turgor pressure decline' when discussing cellular-level mechanisms versus whole-plant responses.
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Frequently Asked Questions
What causes turgor pressure decline in plants?
Water deficit reduces water uptake into cells, lowering internal hydrostatic pressure and cellular turgor maintenance.
How does turgor pressure decline affect plant growth?
Cell expansion requires turgor pressure; its decline restricts growth, causes wilting, and reduces biomass accumulation.
Why Test Candidates on This?
Critical for evaluating drought tolerance mechanisms and plant water relations in stress physiology assessments.
Required skill level: Mid