Theoretical considerations about carbon isotope distribution in glucose of C3 plants

Functional Plant Biology : FPB
Guillaume TcherkezJaleh Ghashghaie

Abstract

The origin of the non-statistical intramolecular distribution of 13C in glucose of C3 plants is examined, including the role of the aldolisation of triose phosphates as proposed by Gleixner and Schmidt (1997). A modelling approach is taken in order to investigate the relationships between the intramolecular distribution of 13C in hexoses and the reactions of primary carbon metabolism. The model takes into account C-C bond-breaking reactions of the Calvin cycle and leads to a mathematical expression for the isotope ratios in hexoses in the steady state. In order to best fit the experimentally-observed intramolecular distribution, the values given by the model indicate that (i), the transketolase reaction fractionates against 13C by 4-7‰ and (ii), depending on the photorespiration rate used for estimations, the aldolase reaction discriminates in favour of 13C by 6‰ during fructose-1,6-bisphosphate production; an isotope discrimination by 2‰ against 13C is obtained when the photorespiration rate is high. Additionally, the estimated fractionations are sensitive to the flux of starch synthesis. Fructose produced from starch breakdown is suggested to be isotopically heavier than sucrose produced in the light, and so the balance betwe...Continue Reading

References

Dec 6, 1976·Biochemical and Biophysical Research Communications·M H O'Leary
Nov 9, 1990·Biochimica Et Biophysica Acta·K Kubota, H Ashihara
Dec 1, 1974·Biomedical Mass Spectrometry·G RinaldiJ M Hayes
Jul 11, 2001·Rapid Communications in Mass Spectrometry : RCM·W WanekA Richter
Jan 17, 2003·Plant Physiology·Guillaume TcherkezJaleh Ghashghaie
Oct 21, 2003·Planta·Sean E WeiseThomas D Sharkey
Jun 1, 1991·Plant Physiology·A RossmannH L Schmidt

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Citations

Jul 21, 2009·Rapid Communications in Mass Spectrometry : RCM·Emmanuelle LamadeJaleh Ghashghaie
Jul 16, 2009·Rapid Communications in Mass Spectrometry : RCM·Marion DevauxDenis Loustau
Jul 16, 2009·Rapid Communications in Mass Spectrometry : RCM·Florence Maunoury-DangerGuillaume Tcherkez
Oct 20, 2010·Plant, Cell & Environment·Guillaume TcherkezAgnes Grapin
Aug 2, 2013·The New Phytologist·Lucas A CernusakGraham D Farquhar
Nov 21, 2013·The New Phytologist·Jaleh Ghashghaie, Franz W Badeck
Jun 1, 2015·Functional Plant Biology : FPB·Frederik WegenerChristiane Werner
Dec 14, 2005·Rapid Communications in Mass Spectrometry : RCM·Salvador NoguésJaleh Ghashghaie
Jan 31, 2006·Rapid Communications in Mass Spectrometry : RCM·Sabine GöttlicherAndreas Richter
Feb 26, 2010·Isotopes in Environmental and Health Studies·Kadmiel MaseykMaurizio Mencuccini
Oct 18, 2012·Proceedings of the National Academy of Sciences of the United States of America·Alexis GilbertGuillaume G B Tcherkez
May 7, 2015·The New Phytologist·Sarah FischerHenrik Hartmann
Apr 15, 2015·Journal of Experimental Botany·John A Raven, Howard Griffiths
Apr 11, 2014·Plant, Cell & Environment·Nerea Ubierna, Graham D Farquhar
Aug 1, 2015·Plant, Cell & Environment·Emmanuelle LamadeJaleh Ghashghaie

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