Proline accumulation mechanism
nounPronunciation: /ˈproʊliːn əˈkjuːmjəleɪʃən ˈmɛkənɪzəm/
A metabolic pathway where plants synthesize and accumulate the amino acid proline as a compatible solute during water or osmotic stress. Proline serves multiple protective functions including osmoregulation, antioxidant defense, and protein stabilization.
Plain English
The process where plants build up an amino acid called proline to help them survive salt or drought stress.
Etymology & History
Usage
"Proline accumulation mechanisms in rice cultivars correlate strongly with drought tolerance and field performance."
Style guide notes: Quantify proline using HPLC or colorimetric assays and express results as μmol g⁻¹ fresh weight.
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Frequently Asked Questions
Why is proline specifically beneficial during abiotic stress?
Proline stabilizes proteins, scavenges free radicals, and adjusts cellular osmotic potential without disrupting enzyme function.
How quickly can plants accumulate proline during stress?
Proline levels can increase 10-100 fold within hours of stress onset through upregulation of biosynthetic enzymes.
Why Test Candidates on This?
Fundamental marker for assessing stress tolerance and is commonly measured in breeding programs and stress physiology studies.
Required skill level: Mid