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photosynthetically active radiation

That portion of the electromagnetic spectrum that is the energy source utilized for photosynthesis and generally coincides with the visible light spectrum (approximately 400-700 nm). PAR is characterized by the greater absorption of the blue light and red light wavelengths by pigments.
Concept Schemes:
Broader Concept:
Entry Terms:
  • photosynthetic active radiation
  • PAR (photosynthetically active radiation)
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RDF/XMLCreated 2006-05-05, last modified 2017-12-06