Abstract
The relative abundance of the carbon isotopes in plants indicates the pathway by which the primary carbon is assimilated. Plants of the C3 and C4-types can be easily distinguished from each other by isotope analysis of tissue of any organ or of most metabolic fractions. Plants of the CAM type behave differently, the isotope composition of different metabolites and different organs may show large variations in the same plant specimen. Results obtained by different authors are compared and discussed on basis of isotope discrimination models attempting to assess how much of the observed variations in the 13C/12C ratio of CAM plants can be due to: 1. variations of environmental parameters as e.g. isotope composition of the atmosphere, and 2. variation in the carbon fixation pathway correlated with environmental parameters (e.g. temperature, illumination, water availability) and biologic parameters (e.g. age).
Work supported in part by the Laboratoire de Géologie Dynamique, Université de Paris VI, and the Laboratoire de Physiologie Cellulaire Végétale, Université de Paris-Sud.
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Lerman, J.C. (1975). How to Interpret Variations in the Carbon Isotope Ratio of Plants: Biologic and Environmental Effects. In: Marcelle, R. (eds) Environmental and Biological Control of Photosynthesis. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1957-6_32
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DOI: https://doi.org/10.1007/978-94-010-1957-6_32
Publisher Name: Springer, Dordrecht
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