Abstract
The isotopic CO2 technique for measuring photorespiration was shown to be a valid technique for measuring the unidirectional inward and outward fluxes of CO2 from a sunflower (Helianthus annuus L.) leaf in the light. The rate of photorespiration was decreased little as the CO2 concentration was increased from 20 to 1,150 microliters per liter. This finding contradicts the widely held assumption that photorespiration is suppressed at high CO2 concentrations. Some discussion regarding this apparent conflict is presented.
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Selected References
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- Bate G. C., D'Aoust A., Canvin D. T. Calibration of Infra-red CO(2) Gas Analyzers. Plant Physiol. 1969 Aug;44(8):1122–1126. doi: 10.1104/pp.44.8.1122. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bowes G., Ogren W. L. Oxygen inhibition and other properties of soybean ribulose 1,5-diphosphate carboxylase. J Biol Chem. 1972 Apr 10;247(7):2171–2176. [PubMed] [Google Scholar]
- Bravdo B. A. Decrease in net photosynthesis caused by respiration. Plant Physiol. 1968 Apr;43(4):479–483. doi: 10.1104/pp.43.4.479. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Halliwell B., Butt V. S. Oxidative decarboxylation of glycollate and glyoxylate by leaf peroxisomes. Biochem J. 1974 Feb;138(2):217–224. doi: 10.1042/bj1380217. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Halliwell B. Oxidation of formate by peroxisomes and mitochondria from spinach leaves. Biochem J. 1974 Jan;138(1):77–85. doi: 10.1042/bj1380077. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 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]
- Ludwig L. J., Canvin D. T. The Rate of Photorespiration during Photosynthesis and the Relationship of the Substrate of Light Respiration to the Products of Photosynthesis in Sunflower Leaves. Plant Physiol. 1971 Dec;48(6):712–719. doi: 10.1104/pp.48.6.712. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ogren W. L., Bowes G. Ribulose diphosphate carboxylase regulates soybean photorespiration. Nat New Biol. 1971 Mar 31;230(13):159–160. doi: 10.1038/newbio230159a0. [DOI] [PubMed] [Google Scholar]
- Servaites J. C. Chemical inhibition of the glycolate pathway in soybean leaf cells. Plant Physiol. 1977 Oct;60(4):461–466. doi: 10.1104/pp.60.4.461. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zelitch I. The photooxidation of glyoxylate by envelope-free spinach chloroplasts and its relation to photorespiration. Arch Biochem Biophys. 1972 Jun;150(2):698–707. doi: 10.1016/0003-9861(72)90088-4. [DOI] [PubMed] [Google Scholar]