Claim · model-written summary
Ozone stress significantly increased stomatal conductance rates in both clones during the late summer.
- Taxon
- Betula pendula
Betula pendulae0 - Treatment
- ozone stresse4
- Outcome
- stomatal conductance ratese4
- Direction
- increasede4
- Setting
- late summere4
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“European white birch (Betula pendula Roth)”
e4“In both clones, ozone stress led to significantly reduced leaf-level net photosynthesis but significantly increased stomatal conductance rates during the late summer”
Title
Responses of selected birch (Betula pendula Roth) clones to ozone change over time
E. OKSANEN Plant Cell & Environment 2003. doi:10.1046/j.1365-3040.2003.01020.x
Other claims from this paper (9)
- Intervention effect In the sensitive clone, ozone reduced growth by 12–48% after 6 years of exposure, a significant difference.
- Intervention effect In the tolerant clone, ozone reduced growth by 1–38% in larger trees, a significant difference in stem volume.
- Observation Saplings of the tolerant clone were previously unaffected by ozone in growth.
- Intervention effect Ozone stress significantly reduced leaf-level net photosynthesis in both clones during the late summer.
- Intervention effect Ozone stress led to a lower carbon gain for bud formation.
- Observation Ozone stress led to the onset of visible foliar injuries.
- Mechanism Increasing ozone sensitivity with exposure duration is explained by a change in growth form.
- Mechanism Increasing ozone sensitivity with exposure duration is explained by a lower photosynthesis to stomatal conductance ratio in late summer.
- Mechanism Increasing ozone sensitivity with exposure duration is explained by deleterious carry-over effects from fewer over-wintering buds.