Oxidative burst response
noun phrasePronunciation: /ɑːkˈsɪdətɪv ˈbɜːrst rɪˈspɑːns/
A rapid, transient increase in reactive oxygen species (ROS) production by plant cells triggered by abiotic stress signals, pathogen perception, or cellular damage. This controlled ROS generation functions as a signaling mechanism to activate defense responses and can induce programmed cell death in severely damaged tissues.
Plain English
A sudden spike in harmful oxygen molecules that plants produce to signal danger and trigger protective responses.
Etymology & History
Usage
"The oxidative burst response in wheat seedlings following salt stress activation involves NADPH oxidase-mediated superoxide generation."
Style guide notes: Use 'response' not 'reaction' to denote the broader signaling context; specify ROS type when precision required.
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Contrasted with
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Frequently Asked Questions
What enzymes generate ROS during oxidative burst response?
NADPH oxidases (respiratory burst oxidase homologs), peroxidases, and mitochondrial electron transport chain enzymes produce superoxide and hydrogen peroxide.
How long does an oxidative burst response typically last?
Peak ROS production occurs within minutes to hours after stress perception, with kinetics varying by stress type and plant species.
Why Test Candidates on This?
Fundamental to understanding stress signaling mechanisms in physiology and molecular biology examinations.
Required skill level: Mid