Claim · model-written summary
Wheat grown in the two cultivation environments did not differ in response to high CO2.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- response to high [CO2]e0
- Direction
- no differencese0
- Comparator
- soilless media in a glasshousee0
- Setting
- growth chamberse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no differences in the response to high [CO2] between wheat grown hydroponically in growth chambers under fluorescent lights and those grown in soilless media in a glasshouse under sunlight and high pressure sodium lamps”
Title
Very High CO2Reduces Photosynthesis, Dark Respiration and Yield in Wheat
J REUVENI Annals of Botany 1997. doi:10.1006/anbo.1997.0489
Other claims from this paper (16)
- Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased wheat seed yield by 33%.
- Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased vegetative biomass by 25%.
- Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased heads per square meter by 34%.
- Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased seed yield by 37%.
- Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased harvest index by 14%.
- Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased mass per seed by 9%.
- Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased seeds per head by 29%.
- Intervention effect Very high CO2 had negligible, nonsignificant effects on vegetative biomass, heads per square meter, and seed mass per head.
- Intervention effect Seed yield, harvest index and seeds per head sharply decreased between 1000 and 2600 micromoles mol-1 CO2.
- Intervention effect Further raising CO2 from 2600 to 10000 micromoles mol-1 produced a smaller further decrease in those yield traits.
- Observation The two wheat cultivars responded similarly to CO2 across growth parameters.
- Association High CO2 was not correlated with ethylene production by wheat flag leaves or heads.
- Intervention effect Whole-plant photosynthetic rate was 8% lower at 2600 micromoles mol-1 CO2 than at ambient CO2.
- Intervention effect Wheat head dark respiration was 25% lower at 2600 micromoles mol-1 CO2 than at ambient CO2.
- Mechanism The authors attribute reduced seed set mainly to reduced dark respiration in wheat heads.
- Mechanism The authors conclude that ethylene does not mediate reduced wheat seed set.