Claim · model-written summary
The large CO2 gradient between intercellular spaces and chloroplasts explained a substantial part of the PNUEmax difference between Quercus and the other species.
- Compound
- CO 2e1
- Outcome
- differences in PNUE maxe1
- Qualifier
- large gradient in CO 2 concentration between intercellular spaces and chloroplastse1
QuercusNot reportedMaterialGeneOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The large gradient in CO 2 concentration between intercellular spaces and chloroplasts was another factor that explained a substantial part of the differences in PNUE max between Quercus and the other species that had smaller gradients”
Title
Analysis of differences in photosynthetic nitrogen‐use efficiency between four contrasting species
Thijs L. Pons; Milka H. M. Westbeek Physiologia Plantarum 2004. doi:10.1111/j.1399-3054.2004.00380.x
Other claims from this paper (8)
- Observation Photosynthetic nitrogen-use efficiency decreased in the order Galinsoga ciliata, Origanum vulgare, Populus nigra, Quercus robur.
- Intervention effect Nutrient availability did not have a large effect on PNUE except in Galinsoga.
- Association Leaf mass per unit area was negatively correlated with PNUEmax.
- Mechanism The negative correlation between leaf mass per unit area and PNUEmax is likely partly caused by N present in cell wall proteins.
- Observation The trees had a larger fraction of photosynthetic N in light harvesting components than the herbs.
- Mechanism The larger light-harvesting N fraction contributed substantially to the PNUEmax difference between trees and herbs, but not to PNUE calculated for an overcast day.
- Mechanism High intercellular CO2 concentration in Galinsoga and Populus contributed significantly to their higher PNUEmax, particularly at low nutrient availability.
- Mechanism Stomatal and internal conductances for CO2 explained most of the PNUEmax difference between Quercus and Populus at high nutrient availability.