Claim · model-written summary
Elevated CO2 increased mean relative growth rate by 6.9% under drought.
- Taxon
- Sitka spruce
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Picea sitchensise0 - Treatment
- elevated CO(2)e1
- Outcome
- mean relative growth ratee1
- Direction
- increasee1
- Value
- 6.9%e1
- Qualifier
- drought treatmente1
- Comparator
- controlse1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“Two-year-old Sitka spruce (Picea sitchensis (Bong.) Carr.) plants”
e1“Plants growing in elevated CO(2) showed a 6.9% increase in mean relative growth rate compared to controls in the drought treatment”
Title
J. Townend Tree Physiology 1993. doi:10.1093/treephys/13.4.389
Other claims from this paper (8)
- Intervention effect Elevated CO2 increased mean relative growth rate by 9.8% under well-watered conditions.
- Observation Growth responses to elevated CO2 varied considerably among clones and water treatments.
- Intervention effect Net CO2 assimilation was higher under elevated than ambient CO2 in both watering treatments.
- Intervention effect Stomatal conductance was lower under elevated than ambient CO2 in both watering treatments.
- Intervention effect Elevated CO2 doubled instantaneous water use efficiency.
- Intervention effect Elevated CO2 did not affect biomass partitioning to roots.
- Intervention effect Elevated CO2 decreased the ratio of needle mass to stems and branches mass.
- Intervention effect Xylem pressure potentials increased under elevated CO2.