Osmotic potential gradient
nounPronunciation: /ɒzˈmɒtɪk pəˈtenʃəl ˈɡreɪdiənt/
The difference in water potential between plant cells and their surrounding environment, driving water movement across cell membranes. This gradient is essential for maintaining turgor pressure and cellular function under drought stress conditions.
Plain English
The difference in dissolved particle concentration between plant cells and surrounding water that determines how water moves in or out of cells.
Etymology & History
Usage
"The osmotic potential gradient between root cells and soil water determines the plant's ability to extract moisture during drought."
Style guide notes: Always specify context (drought, salt stress) when discussing osmotic potential gradient in research writing.
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Contrasted with
Related Terms
Frequently Asked Questions
How does osmotic potential gradient affect water absorption in stressed plants?
A steeper gradient increases water uptake capacity, helping plants survive drought by pulling water from soil.
What factors modify osmotic potential gradient during stress?
Solute accumulation, osmolyte production, and cell volume changes all alter the gradient during abiotic stress.
Why Test Candidates on This?
Essential for understanding plant water relations and drought response mechanisms in abiotic stress research.
Required skill level: Mid