metabolic rate depression (MRD)
nounPronunciation: /ˌmɛtəˈbɒlɪk reɪt dɪˈpreʃən/
A coordinated reduction in cellular metabolic activity and energy expenditure as an adaptive response to abiotic stress conditions. MRD conserves limited resources while maintaining essential physiological functions.
Plain English
A plant's strategy of slowing down its metabolic processes to conserve energy during stressful conditions.
Etymology & History
Usage
"Cold-acclimated plants exhibited metabolic rate depression, allowing survival through winter with minimal carbohydrate consumption."
Style guide notes: Abbreviation MRD acceptable after first full expansion; typically used in physiological contexts.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does MRD benefit plants under stress?
It conserves carbohydrates and nutrients, extending survival duration when resources are severely limited.
Is MRD reversible when stress ends?
Yes, metabolic rates typically recover within hours or days after stress relief, restoring normal growth.
Why Test Candidates on This?
Relevant for advanced stress physiology topics covering survival mechanisms in extreme conditions.
Required skill level: Senior