Epigenetic stress memory
noun phrasePronunciation: /ˌɛpɪdʒəˈnɛtɪk ˈstrɛs ˈmɛməri/
The stable, heritable modification of chromatin structure and gene expression patterns induced by abiotic stress that persists after stress removal. These changes can be transmitted to offspring and prime plants for faster stress responses.
Plain English
Chemical modifications to plant DNA that mark stress-affected genes and can be passed to offspring, improving future stress responses.
Etymology & History
Usage
"Epigenetic stress memory enables the offspring of drought-stressed plants to exhibit enhanced survival in subsequent droughts."
Style guide notes: Clarify distinction between 'epigenetic stress memory' (heritable chromatin changes) and 'stress priming' (rapid response readiness).
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Frequently Asked Questions
What marks epigenetic stress memory?
DNA methylation, histone modifications, and chromatin remodeling establish heritable stress-response patterns.
Can offspring inherit stress tolerance?
Yes, epigenetic marks can be transmitted through cell division and meiosis, priming offspring for stress responses.
Why Test Candidates on This?
Critical for cutting-edge plant breeding and understanding adaptive mechanisms in climate change contexts.
Required skill level: Expert