Osmotic potential adjustment
noun phrasePronunciation: /ɒzˈmɒtɪk pəˈtenʃəl əˈdʒʌstmənt/
The active or passive modification of solute concentration within plant cells to maintain turgor pressure and cellular function under water-limiting conditions. This process enables continued growth and metabolic activity despite reduced external water availability.
Plain English
The plant's ability to change internal salt and sugar concentrations to maintain water uptake when water is scarce.
Etymology & History
Usage
"Osmotic potential adjustment through accumulation of compatible solutes allows drought-tolerant crops to maintain growth."
Style guide notes: Distinguish between 'osmotic adjustment' (active process) and passive osmotic changes.
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Contrasted with
Related Terms
Frequently Asked Questions
What solutes contribute to osmotic potential adjustment?
Proline, sugars, potassium ions, and betaine accumulate to lower osmotic potential.
Why is osmotic adjustment crucial for stress tolerance?
It maintains turgor pressure needed for cell elongation, photosynthesis, and nutrient transport.
Why Test Candidates on This?
Essential for understanding plant water relations and drought stress tolerance mechanisms.
Required skill level: Mid