Claim · model-written summary
In typical conditions the CO2-hydration equilibrium does not affect CO2 assimilation by more than 9%.
- Taxon
- Xanthium strumarium L.
Xanthium strumariume1 - Treatment
- the CO2-hydration equilibriume3
- Outcome
- effect on CO2 assimilatione3
- Value
- 9%e3
- Qualifier
- in typical conditionse3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Using 12C/13C stable isotope techniques and Xanthium strumarium L. leaves, we show that the on-line carbon isotope discrimination (Δ13C, or Δobs) associated with photosynthesis is not significantly decreased by heavy water”
e3“It is concluded that in typical conditions, the CO2-hydration equilibrium does not exert an effect on CO2 assimilation larger than 9%”
Title
On the effect of heavy water (D2O) on carbon isotope fractionation in photosynthesis
Guillaume Tcherkez; Graham D. Farquhar Functional Plant Biology 2008. doi:10.1071/fp07282
Other claims from this paper (4)
- Intervention effect Heavy water did not significantly decrease the on-line carbon isotope discrimination associated with photosynthesis in Xanthium strumarium.
- Intervention effect Heavy water decreased the internal conductance to CO2 by 8-40% in 21% O2.
- Intervention effect Heavy water slightly decreased the carbon isotope discrimination associated with CO2 addition to RuBP by Rubisco.
- Mechanism The slight decrease of isotope discrimination by heavy water is proposed to come from solvent-derived proton or deuteron use in the last step of Rubisco catalysis.