Claim · model-written summary
Respiration in shaded leaves was lower than expected from the sugar relationship.
- Taxon
- Quercus rubra L.
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Quercus rubrae1 - Outcome
- Respiration rates in the upper shaded leavese0
- Direction
- lowere0
- Comparator
- fully exposed upper and lower leavese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“Respiration rates in the upper shaded leaves were lower than those expected from a relationship between respiration and soluble sugar concentration for fully exposed upper and lower leaves”
e1“Quercus rubra L. canopy”
Title
David Whitehead; Kevin L. Griffin; Matthew H. Turnbull; et al. Global Change Biology 2004. doi:10.1111/j.1529-8817.2003.00739.x
Other claims from this paper (7)
- Observation Upper leaf maximum photosynthesis was about four times higher than lower leaf photosynthesis.
- Intervention effect Shaded upper leaves had about half the maximum photosynthesis of upper leaves.
- Association Night respiration related linearly to previous-day photosynthesis at a fixed temperature.
- Intervention effect Leaf area, nitrogen, chlorophyll and carboxylation measurements did not differ significantly with shading.
- Intervention effect Shading decreased electron transport and light use efficiency.
- Observation Starch concentrations lacked a similar difference.
- Method / resource A model with prior-day photosynthesis lowered estimated growing-season night respiration by 23%.