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. 1983 Dec;73(4):983–988. doi: 10.1104/pp.73.4.983

Estimation of Photorespiration Based on the Initial Rate of Postillumination CO2 Release

II. Effects of O2, CO2, and Temperature

Richard B Peterson 1
PMCID: PMC1066593  PMID: 16663356

Abstract

An open system associated with an infrared gas analyzer was employed to study transients in CO2 exchange generated upon darkening preilluminated leaf discs of tobacco (Nicotiana tabacum vars John Williams Broadleaf and Havana Seed). An empirical formula presented previously enabled prediction of the analyzer response under nonsteady state conditions as a function of time and of the leaf CO2 exchange rate. A computer was used to evaluate parameters of the leaf CO2 release rate to provide an estimate of the initial rate of postillumination CO2 evolution and to produce maximal agreement between predicted and observed analyzer responses. In 21% O2, the decline in rate of CO2 evolution upon darkening followed first order kinetics. Initial rates of CO2 evolution following darkening were relatively independent of the prior ambient CO2 concentrations. However, rates of photorespiration expressed as a fraction of net photosynthesis declined rapidly with increasing external CO2 concentration at 21% O2. Under normal atmospheric conditions, photorespiration was 45 to 50% of the net CO2 fixation rate at 32°C and high irradiance. The rapid initial CO2 evolution observed upon darkening at 21% O2 was absent in 3% O2. Rates of photorespiration under normal atmospheric concentrations of CO2 and O2 as measured by the postillumination burst were highly dependent upon temperature (observed activation energy = 30.1 kilocalories per mole). The results are discussed with respect to previously published estimates of photorespiration in C3 leaf tissue.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Bravdo B. A. Effect of carbon dioxide on photorespiration. Plant Physiol. 1979 Feb;63(2):399–401. doi: 10.1104/pp.63.2.399. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Decker J. P. A Rapid, Postillumination Deceleration of Respiration in Green Leaves. Plant Physiol. 1955 Jan;30(1):82–84. doi: 10.1104/pp.30.1.82. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Decker J. P. Comparative Responses of Carbon Dioxide Outburst and Uptake in Tobacco. Plant Physiol. 1959 Mar;34(2):100–102. doi: 10.1104/pp.34.2.100. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Heichel G. H. Response of Respiration of Tobacco Leaves in Light and Darkness and the CO(2) Compensation Concentration to Prior Illumination and Oxygen. Plant Physiol. 1971 Aug;48(2):178–182. doi: 10.1104/pp.48.2.178. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Hew C. S., Krotkov G., Canvin D. T. Determination of the Rate of CO(2) Evolution by Green Leaves in Light. Plant Physiol. 1969 May;44(5):662–670. doi: 10.1104/pp.44.5.662. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Ku S. B., Edwards G. E. Oxygen Inhibition of Photosynthesis: I. Temperature Dependence and Relation to O(2)/CO(2) Solubility Ratio. Plant Physiol. 1977 May;59(5):986–990. doi: 10.1104/pp.59.5.986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Laing W. A. Regulation of Soybean Net Photosynthetic CO(2) Fixation by the Interaction of CO(2), O(2), and Ribulose 1,5-Diphosphate Carboxylase. Plant Physiol. 1974 Nov;54(5):678–685. doi: 10.1104/pp.54.5.678. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Marynick D. S. A Mathematical Treatment of Rate Data Obtained in Biological Flow Systems under Nonsteady State Conditions. Plant Physiol. 1975 Nov;56(5):680–683. doi: 10.1104/pp.56.5.680. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Peterson R. B. Estimation of Photorespiration Based on the Initial Rate of Postillumination CO(2) Release: I. A Nonsteady State Model for Measurement of CO(2) Exchange Transients. Plant Physiol. 1983 Dec;73(4):978–982. doi: 10.1104/pp.73.4.978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Vines H. M., Armitage A. M., Chen S. S., Tu Z. P., Black C. C. A Transient Burst of CO(2) from Geranium Leaves during Illumination at Various Light Intensities as a Measure of Photorespiration. Plant Physiol. 1982 Aug;70(2):629–631. doi: 10.1104/pp.70.2.629. [DOI] [PMC free article] [PubMed] [Google Scholar]

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