Global InformationKinetic isotope effects of RuBisCO information
The kinetic isotope effect (KIE) of ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO) is the isotopic fractionation associated solely with the step in the Calvin-Benson cycle where a molecule of carbon dioxide (CO2) is attached to the 5-carbon sugar ribulose-1,5-bisphosphate (RuBP) to produce two 3-carbon sugars called 3-phosphoglycerate (3 PGA). This chemical reaction is catalyzed by the enzyme RuBisCO, and this enzyme-catalyzed reaction creates the primary kinetic isotope effect of photosynthesis.[1] It is also largely responsible for the isotopic compositions of photosynthetic organisms and the heterotrophs that eat them.[2][3] Understanding the intrinsic KIE of RuBisCO is of interest to earth scientists, botanists, and ecologists because this isotopic biosignature can be used to reconstruct the evolution of photosynthesis and the rise of oxygen in the geologic record, reconstruct past evolutionary relationships and environmental conditions, and infer plant relationships and productivity in modern environments.[4][5][6]
- ^ Farquhar, Graham D.; O'Leary, Marion H.; Berry, Joe A. (1982). "On the relationship between carbon isotope discrimination and the intercellular carbon dioxide concentration in leaves". Functional Plant Biology. 9 (2): 121–137. doi:10.1071/PP9820121.
- ^ Zanden, M. Jake Vander; Rasmussen, Joseph B. (November 2001). "Variation in δ15N and δ13C trophic fractionation: Implications for aquatic food web studies". Limnology and Oceanography. 46 (8): 2061–2066. Bibcode:2001LimOc..46.2061Z. doi:10.4319/lo.2001.46.8.2061. ISSN 0024-3590.
- ^ McCutchan, James H.; Lewis, William M.; Kendall, Carol; McGrath, Claire C. (August 2003). "Variation in trophic shift for stable isotope ratios of carbon, nitrogen, and sulfur". Oikos. 102 (2): 378–390. doi:10.1034/j.1600-0706.2003.12098.x. ISSN 0030-1299.
- ^ Farquhar, G. D.; Hubick, K. T.; Condon, A. G.; Richards, R. A. (1989), "Carbon Isotope Fractionation and Plant Water-Use Efficiency", Stable Isotopes in Ecological Research, Springer New York, pp. 21–40, doi:10.1007/978-1-4612-3498-2_2, ISBN 9781461281276
- ^ Körner, Ch.; Farquhar, G. D.; Wong, S. C. (September 1991). "Carbon isotope discrimination by plants follows latitudinal and altitudinal trends". Oecologia. 88 (1): 30–40. Bibcode:1991Oecol..88...30K. doi:10.1007/bf00328400. ISSN 0029-8549. PMID 28312728. S2CID 36219207.
- ^ Hayes, John M.; Strauss, Harald; Kaufman, Alan J. (September 1999). "The abundance of 13C in marine organic matter and isotopic fractionation in the global biogeochemical cycle of carbon during the past 800 Ma". Chemical Geology. 161 (1–3): 103–125. Bibcode:1999ChGeo.161..103H. doi:10.1016/s0009-2541(99)00083-2. ISSN 0009-2541.