Genotoxic Stress
nounPronunciation: /ˌdʒɛnəʊˈtɒksɪk ˈstrɛs/
Stress conditions that cause direct damage to DNA structure, including breaks, base modifications, and mutations, triggered by environmental factors like heavy metals and ionizing radiation. Genotoxic stress activates DNA repair mechanisms and cellular checkpoint controls.
Plain English
Environmental damage to plant DNA caused by toxic substances or harmful radiation.
Etymology & History
Usage
"Heavy metal exposure induced genotoxic stress in root cells, triggering DNA repair pathways and growth inhibition."
Style guide notes: Use precise terminology; distinguish from general oxidative damage and mutagenesis.
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Contrasted with
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Frequently Asked Questions
What causes genotoxic stress in plants?
Heavy metals, ultraviolet radiation, and ionizing radiation cause DNA breaks and base modifications in plant cells.
How do plants respond to genotoxic stress?
Plants activate DNA repair mechanisms, cell cycle checkpoints, and apoptosis pathways to manage genetic damage.
Why Test Candidates on This?
Important for understanding molecular responses to environmental contaminants and long-term stress impacts on plant genetics.
Required skill level: Expert