Anthocyanin accumulation response
noun phrasePronunciation: /ˌænθoʊˈsaɪənɪn əˌkjuːmjəˈleɪʃən rɪˈspɑːns/
The enhanced synthesis and deposition of anthocyanin pigments in plant tissues as a protective response to abiotic stresses including excess light, cold, and drought. These flavonoid compounds provide both light-absorbing photoprotection and antioxidant defense against stress-induced reactive oxygen species.
Plain English
The buildup of red and purple pigments in plants as a protective reaction to environmental stress.
Etymology & History
Usage
"The anthocyanin accumulation response in cold-stressed Arabidopsis seedlings provided both photoprotection and osmoprotection under combined light and temperature stress."
Style guide notes: Distinguish between anthocyanin synthesis upregulation and actual tissue accumulation when discussing physiological responses.
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Frequently Asked Questions
What stresses trigger anthocyanin accumulation in plants?
High light, cold temperatures, drought, and nutrient deficiencies commonly induce anthocyanin synthesis and accumulation.
How do anthocyanins protect plants from stress?
They absorb excess light energy and neutralize damaging free radicals through their potent antioxidant chemical properties.
Why Test Candidates on This?
Tested in advanced plant biochemistry and stress physiology courses focused on secondary metabolism.
Required skill level: Senior