Photosynthetic rate
nounPronunciation: /ˌfoʊtəsɪnˈθɛtɪk reɪt/
The amount of carbon dioxide fixed or oxygen produced per unit time, measured as the net or gross carbon assimilation in photosynthetic tissues. This rate declines significantly under abiotic stresses such as drought, heat, or light limitation.
Plain English
The speed at which plants convert sunlight into chemical energy through photosynthesis.
Etymology & History
Usage
"The photosynthetic rate of heat-stressed wheat leaves decreased by 40% compared to control plants maintained at optimal temperatures."
Style guide notes: Specify whether net or gross photosynthetic rate is discussed; use μmol CO₂ m⁻² s⁻¹ as standard unit in technical contexts.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How do drought stresses affect photosynthetic rate?
Drought reduces photosynthetic rate through stomatal closure and decreased enzyme activity, limiting carbon fixation and biomass accumulation.
Which environmental factors influence photosynthetic rate most?
Light intensity, temperature, CO₂ concentration, and water availability are primary factors controlling photosynthetic rate in plant tissues.
Why Test Candidates on This?
Essential indicator of plant stress status and resilience, commonly measured in abiotic stress experiments and climate research.
Required skill level: Mid