Proline accumulation pattern
noun phrasePronunciation: /ˈproʊlin əˌkjuːmjəˈleɪʃən ˈpætərn/
The temporal and spatial increase of proline amino acid concentration in plant tissues as a response to osmotic and temperature stresses. Proline functions as both an osmolyte for turgor maintenance and a free radical scavenger.
Plain English
The buildup of proline amino acid in plant tissues during drought, salt, or cold stress to protect cells from damage.
Etymology & History
Usage
"Proline accumulation patterns differed significantly between salt-tolerant and salt-sensitive genotypes, with tolerant lines reaching 8-fold increases."
Style guide notes: Distinguish between free proline and bound proline in proteins; report units consistently (mg/g DW preferred).
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Contrasted with
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Frequently Asked Questions
What is the dual function of proline in stressed plants?
Proline maintains cell turgor as osmolyte and protects proteins and membranes from ROS damage.
How quickly does proline accumulation occur after stress?
Significant increases typically appear within 24-48 hours depending on stress intensity and plant genotype.
Why Test Candidates on This?
Frequently used as stress tolerance indicator in screening studies and cultivar comparisons.
Required skill level: Junior