Osmoprotectants
nounPronunciation: /ˌɒzmoʊˈproʊtɛktənt/
Organic compounds including polyols, amino acids, and quaternary ammonium compounds that accumulate in plant cells to lower osmotic potential and maintain water uptake under abiotic stress. These compounds stabilize proteins and membranes while minimizing osmotic imbalance.
Plain English
Special chemical compounds plants produce to help them retain water and survive stress conditions.
Etymology & History
Usage
"Accumulation of osmoprotectants such as sorbitol and glycine betaine enabled the salt-tolerant cultivar to maintain growth under saline conditions."
Style guide notes: Use plural 'osmoprotectants' when discussing multiple compounds; specify individual compounds in detailed analyses.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What are common osmoprotectants in plants?
Common osmoprotectants include proline, glycine betaine, sorbitol, mannitol, and trehalose depending on species.
How do osmoprotectants help plants survive stress?
Osmoprotectants lower osmotic potential to favor water uptake, stabilize proteins, and protect membranes from damage.
Why Test Candidates on This?
Essential for understanding physiological mechanisms of stress tolerance and identifying genetic targets for crop improvement.
Required skill level: Senior