Oxidative stress signaling
nounPronunciation: /ˈɒksɪdətɪv ˈstres ˈsɪɡnəlɪŋ/
The cellular communication pathway triggered by reactive oxygen species accumulation that activates adaptive or defensive gene expression programs. This process involves perception of ROS levels and transduction of stress signals to the nucleus.
Plain English
The system that detects harmful oxygen byproducts and triggers plant defense responses.
Etymology & History
Usage
"Oxidative stress signaling rapidly upregulates antioxidant enzyme production in response to UV radiation exposure."
Style guide notes: Distinguish between 'oxidative stress signaling' (beneficial communication) and 'oxidative damage' (harmful consequence).
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Related Terms
Frequently Asked Questions
What role do ROS play in plant signaling?
ROS molecules act as secondary messengers triggering stress adaptation pathways at low concentrations.
How fast does oxidative stress signaling occur?
Initial ROS perception and early gene responses occur within minutes of stress exposure.
Why Test Candidates on This?
Essential for understanding plant molecular stress responses and advanced plant physiology coursework.
Required skill level: Senior