Abstract
Photorespiration occurs in all C3 higher plants as a result of the formation of phosphoglycolate and the subsequent metabolism of glycolate through the glycolate pathway (Fig. 1). It has as its external manifestations O2 uptake and CO2 release. The O2 uptake observed in the light (3, 8) can be entirely (3) or largely (8) attributed to oxygenation of ribulose-1,5-bisphosphate and the subsequent metabolism of glycolate. The CO2 production arises from the conversion of glycine to serine (7) or possibly some may arise from the decarboxylation of glyoxylate (10). Nitrogen metabolism is associated with photorespiration at several points: 1) the transamination of glyoxylate with glutamate to form glycine; 2) the release of ammonia during glycine decarboxylation; 3) the reassimilation of this released ammonia into amino acids; 4) the transamination of glyoxylate with serine to yield hydroxy-pyruvate and glycine.
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© 1981 Martinus Nijhoff / Dr W. Junk Publishers, The Hague - Boston - London
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Canvin, D.T. (1981). Photorespiration and Nitrogen Metabolism. In: Bewley, J.D. (eds) Nitrogen and Carbon Metabolism. Developments in Plant and Soil Sciences, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8267-3_7
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DOI: https://doi.org/10.1007/978-94-009-8267-3_7
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