Turgor Loss Point (TLP)
nounPronunciation: /ˈtɜːɡər lɒs pɔɪnt/
The leaf water potential at which cells lose their turgor pressure and plasmolysis occurs, marking critical drought stress severity. This threshold is species-specific and indicates the minimum water status a plant can tolerate.
Plain English
The specific water stress level at which plant cells collapse from dehydration and cannot recover.
Etymology & History
Usage
"The turgor loss point of desert species ranged from -3 to -5 MPa, enabling extreme desiccation tolerance."
Style guide notes: Abbreviate as 'TLP' consistently; always report in pressure units (typically MPa).
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Related Terms
Frequently Asked Questions
What happens at the turgor loss point?
Cell membrane separates from cell wall as water loss exceeds critical threshold, causing permanent damage.
How is turgor loss point measured?
Scientists use pressure-volume curves and psychrometers to determine water potential at turgor loss.
Why Test Candidates on This?
Essential for drought tolerance breeding and plant water stress characterization studies.
Required skill level: Senior