Claim · model-written summary
Ozone exposure decreased root dry weight by 15·2% over the long term.
- Taxon
- Betula pendula
Betula pendulat0 - Treatment
- ozone exposuree4
- Outcome
- root DWe2
- Direction
- decreasede2
- Value
- 15·2%e2
- Comparator
- ambient ozonee3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“birch (Betula pendula Roth)”
e2“followed by a 7·5% (shoot dry weight (DW)), 15·2% (root DW) and 23·2% (foliage area) decreased biomass accumulation and yield over the long term, including a reduced root : shoot ratio”
e3“exposed to ambient ozone (control treatment”
e4“Deleterious short‐term carry‐over effects of ozone exposure included reduced contents of Rubisco, chlorophyll, carotenoids, starch and nutrients in leaves, lower stomatal conductance, and decreased new shoot growth and net assimilation rate”
Title
E. Oksanen; A. Saleem Plant Cell & Environment 1999. doi:10.1046/j.1365-3040.1999.00501.x
Other claims from this paper (10)
- Intervention effect Ozone exposure reduced Rubisco, chlorophyll and carotenoid contents in birch leaves.
- Intervention effect Ozone exposure reduced starch and nutrient contents in birch leaves.
- Intervention effect Ozone exposure lowered stomatal conductance in birch.
- Intervention effect Ozone exposure decreased new shoot growth and net assimilation rate in birch.
- Intervention effect Ozone exposure decreased shoot dry weight by 7·5% over the long term.
- Intervention effect Ozone exposure decreased foliage area by 23·2% over the long term.
- Intervention effect Ozone exposure reduced the root : shoot ratio in birch over the long term.
- Observation Relative growth rates showed a slow recovery in the two seasons after elevated ozone exposure ended.
- Observation Structural, biochemical and stomatal acclimation occurred in the ozone-tolerant clone.
- Observation In the sensitive clone, allocation shifted from growth towards defensive phenolics such as chlorogenic acid.