Transcription factor activation cascade
nounPronunciation: /trænˈskrɪpʃən ˈfæktər ˌæktɪˈveɪʃən ˈkæskeɪd/
A sequential signaling pathway where abiotic stress triggers activation of upstream transcription factors that subsequently activate downstream transcription factors and stress-responsive genes. This hierarchical regulation enables coordinated gene expression in stress response.
Plain English
A chain reaction of protein activations that turns on stress-defense genes when plants experience environmental stress.
Etymology & History
Usage
"Cold stress initiates a transcription factor activation cascade involving CBF proteins and downstream dehydrin expression."
Style guide notes: Specify upstream and downstream components when describing particular cascade pathways.
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Frequently Asked Questions
What are examples of stress-responsive transcription factors?
CBF/DREB, bZIP, NAC, and WRKY families are major transcription factors in stress responses.
How do cascades improve stress response efficiency?
Cascades amplify signals and enable temporal coordination of multiple defense gene activations.
Why Test Candidates on This?
Essential in molecular genetics and systems biology evaluations of plant stress adaptation mechanisms.
Required skill level: Expert