Cellular redox homeostasis
nounPronunciation: /ˈselʒʊlə ˈriːdɒks ˌhoʊmiˈoʊstəsɪs/
The dynamic balance between oxidized and reduced forms of molecules (NAD+/NADH, GSSG/GSH, NADP+/NADPH) maintained by cells to support normal metabolism while preventing oxidative damage. Disruption of this balance during abiotic stress impairs enzyme function and signal transduction.
Plain English
The balance between oxidizing and reducing molecules in cells that keeps metabolism working properly and prevents damage.
Etymology & History
Usage
"Maintenance of cellular redox homeostasis was critical for stress acclimation in the heat-tolerant cultivar."
Style guide notes: Specify particular redox couples (GSH/GSSG, NAD+/NADH) when discussing homeostasis mechanisms in stress contexts.
Also known as
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Related Terms
Frequently Asked Questions
Why is cellular redox homeostasis disrupted during abiotic stress?
Stress increases ROS production and metabolic perturbations, shifting electron transport chain dynamics and depleting reducing equivalents.
How do plants restore redox homeostasis during stress recovery?
Increased antioxidant enzyme activity and upregulated ferredoxin-dependent pathways regenerate reducing equivalents like NADPH.
Why Test Candidates on This?
Relevant in advanced biochemistry and systems-level stress physiology assessments requiring mechanistic understanding.
Required skill level: Expert