Experimental Evidence for the Isotope Effect in Photorespiration

Experimental Evidence for the Isotope Effect in Photorespiration Recent data on carbon isotope fractionation in photosynthesis are reviewed. Analysis of the carbon isotope composition in photosynthates and derivative products supports the hypothesis of the isotope effect in photorespiration. This hypothesis envisages the existence in a photosynthesizing cell of two carbon flows differing in isotope composition. One of these flows is enriched in 12C and associated with the assimilation pathway of photosynthesis. The other flow enriched in 13C circulates in the photorespiratory pathway. The relation between stimulated photorespiration and the carbon isotope composition of biomass supports this view. Our hypothesis of two interrelated isotope effects in photosynthesis leads to the conclusion that photosynthesis and photorespiration are coupled processes subject to periodical oscillations, where Rubisco acts as a main switch regulating these two pathways. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Experimental Evidence for the Isotope Effect in Photorespiration

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Life Sciences; Plant Sciences
Publisher site
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