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Photosynthetically Active Radiation

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Part of the Encyclopedia of Plant Physiology book series (920,volume 12 / A)

Abstract

It is well known that plants vary in the sensitivity of the photosynthetic apparatus to radiation of different wavelengths (Rabinowitch 1951). This would seem to eliminate any possibility of a unique definition of photosynthetically active radiation (PAR) for use in ecophysiology. Gabrielsen (1960), in his review of photosynthetic action spectra for the original edition of this encyclopedia, gave two basic reasons why this is not so: the variations in spectral response become important only when (1) the spectrum of the radiation is changing, and (2) the photosynthetic rate is limited by the amount of radiation available.

Keywords

  • Photosynthetic Rate
  • Photosynthetically Active Radiation
  • Active Radiation
  • Action Spectrum
  • Spectral Irradiance

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© 1981 Springer-Verlag Berlin · Heidelberg

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McCree, K.J. (1981). Photosynthetically Active Radiation. In: Lange, O.L., Nobel, P.S., Osmond, C.B., Ziegler, H. (eds) Physiological Plant Ecology I. Encyclopedia of Plant Physiology, vol 12 / A. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-68090-8_3

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  • DOI: https://doi.org/10.1007/978-3-642-68090-8_3

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-68092-2

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