Respiratory metabolism of illuminated leaves depends on CO2 and O2 conditions

Proceedings of the National Academy of Sciences of the United States of America
Guillaume TcherkezGabriel Cornic

Abstract

Day respiration is the process by which nonphotorespiratory CO2 is produced by illuminated leaves. The biological function of day respiratory metabolism is a major conundrum of plant photosynthesis research: because the rate of CO2 evolution is partly inhibited in the light, it is viewed as either detrimental to plant carbon balance or necessary for photosynthesis operation (e.g., in providing cytoplasmic ATP for sucrose synthesis). Systematic variations in the rate of day respiration under contrasting environmental conditions have been used to elucidate the metabolic rationale of respiration in the light. Using isotopic techniques, we show that both glycolysis and the tricarboxylic acid cycle activities are inversely related to the ambient CO2/O2 ratio: day respiratory metabolism is enhanced under high photorespiratory (low CO2) conditions. Such a relationship also correlates with the dihydroxyacetone phosphate/Glc-6-P ratio, suggesting that photosynthetic products exert a control on day respiration. Thus, day respiration is normally inhibited by phosphoryl (ATP/ADP) and reductive (NADH/NAD) poise but is up-regulated by photorespiration. Such an effect may be related to the need for NH2 transfers during the recovery of photore...Continue Reading

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Citations

Apr 25, 2012·Plant Molecular Biology·Katrin PetersHans-Peter Braun
Oct 18, 2012·Proceedings of the National Academy of Sciences of the United States of America·Alexis GilbertGuillaume G B Tcherkez
May 27, 2010·Journal of Experimental Botany·Christopher P BickfordNate G McDowell
Oct 17, 2008·Plant Physiology·Gary J LaniganUlli Seibt
Jul 7, 2011·Plant Physiology·Guillaume TcherkezRichard Bligny
Aug 13, 2014·Plant Science : an International Journal of Experimental Plant Biology·Gohar AyubOwen K Atkin
Jul 7, 2009·Annual Review of Plant Biology·Christine H FoyerGraham Noctor
Nov 26, 2009·FEBS Letters·Vasily N PopovAbir U Igamberdiev
Jun 2, 2016·Nature Plants·Cyril AbadieGuillaume Tcherkez
Jan 17, 2012·Current Opinion in Plant Biology·Guillaume TcherkezMichael Hodges
Sep 10, 2011·Trends in Plant Science·Richard P JacobyA Harvey Millar
Mar 8, 2016·Plant Physiology and Biochemistry : PPB·Alexander T EprintsevAbir U Igamberdiev
Jun 1, 2012·Plant, Cell & Environment·Guillaume TcherkezRichard Bligny
Feb 8, 2013·Plant, Cell & Environment·Howard Griffiths, Brent R Helliker
Jun 14, 2013·Ecology and Evolution·Mary HeskelKevin L Griffin
May 26, 2012·The New Phytologist·Kevin L Griffin, Matthew H Turnbull
Apr 12, 2013·Plant Biology·A FlorianA R Fernie
Dec 18, 2012·The New Phytologist·Guillaume Tcherkez
Mar 20, 2016·Journal of Experimental Botany·Younès DelleroMichael Hodges
Jan 20, 2010·Plant, Cell & Environment·Guillaume TcherkezJaleh Ghashghaie
Sep 6, 2013·Plant, Cell & Environment·Chandra Bellasio, Howard Griffiths
Aug 13, 2009·Plant, Cell & Environment·Lisa D PatrickDavid T Tissue
Jul 29, 2015·The Plant Journal : for Cell and Molecular Biology·Younès DelleroMichael Hodges

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