Claim · model-written summary
Late-season photosynthesis in both leaf ages of Clone 216 was lower than in filtered-air controls.
- Taxon
- aspent0
- Material
- Clone 216e0
- Outcome
- photosynthetic rates of both recently mature and mature leavese0
- Direction
- lowere0
- Comparator
- control plants maintained in CF aire0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Verbatim
e0“photosynthetic rates of both recently mature and mature leaves of Clone 216 were lower than those of the control plants maintained in CF air”
t0“aspen”
Title
Photosynthetic productivity of aspen clones varying in sensitivity to tropospheric ozone
M. D. Coleman; J. G. Isebrands; R. E. Dickson; et al. Tree Physiology 1995. doi:10.1093/treephys/15.9.585
Other claims from this paper (19)
- Observation Early-season ozone lowered mature-leaf photosynthesis in all clones.
- Intervention effect Early-season ozone lowered photosynthesis in recently mature leaves only in sensitive Clone 259.
- Intervention effect Midseason ozone lowered photosynthesis in recently mature and mature leaves of sensitive Clone 259.
- Intervention effect Midseason ozone had no effect on recently mature leaf photosynthesis of tolerant Clone 216.
- Intervention effect Ozone decreased mature-leaf photosynthesis in Clone 271.
- Intervention effect Ozone increased or did not affect recently mature-leaf photosynthesis in Clone 271.
- Observation Seedling ozone response patterns resembled clone patterns but were smaller in magnitude.
- Observation Ozone exposed clones showed early leaf abscission.
- Observation Clones 216 and 259 lost more leaf area than Clone 271.
- Intervention effect At the highest ozone treatment, Clone 216 leaf area was 26% below controls by late August.
- Intervention effect At the highest ozone treatment, Clone 259 leaf area was 24% below controls by late August.
- Intervention effect At the highest ozone treatment, Clone 271 leaf area was 9% below controls by late August.
- Intervention effect Ozone reduced whole-tree photosynthesis by 23% in Clone 271.
- Intervention effect Ozone reduced whole-tree photosynthesis by 56% in Clone 216.
- Intervention effect Ozone reduced whole-tree photosynthesis by 56% in Clone 259.
- Intervention effect Ozone accompanied a 19% biomass decline in Clone 271.
- Intervention effect Ozone accompanied a 28% biomass decline in Clone 216.
- Intervention effect Ozone accompanied a 47% biomass decline in Clone 259.
- Mechanism Reduced foliage photosynthetic productivity largely determined the ozone impact on biomass.