Claim · model-written summary
Photosynthesis increased overall with CO 2, without significant species-level effects.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Verbatim
e0“Overall rate of photosynthesis increased with CO 2 but there were no significant effects, at the species level, of CO 2 on photosynthetic rates.”
e1“Five species of old field annual plants”
Title
Analysis of the Differential Response of Five Annuals to Elevated CO2 during Growth
K. Garbutt; W. E. Williams; F. A. Bazzaz Ecology 1990. doi:10.2307/1937386
Other claims from this paper (19)
- Intervention effect Enhanced CO 2 had no detectable effect on emergence timing in any species.
- Intervention effect Amaranthus RGR was always higher at 700 than 350 CO 2.
- Intervention effect Abutilon RGR was greater at high CO 2 initially and lower later.
- Intervention effect Ambrosia RGR was greater at high CO 2 initially and lower later.
- Intervention effect Shoot water potential increased significantly with CO 2 in Amaranthus.
- Intervention effect Shoot water potential increased significantly with CO 2 in Setaria.
- Intervention effect Chenopodium showed a nonsignificant water-potential trend.
- Intervention effect Abutilon showed a nonsignificant water-potential trend.
- Intervention effect Stomatal conductance declined with CO 2 in C 3 species at both light levels.
- Intervention effect Stomatal conductance declined with CO 2 in C 4 species at high light.
- Intervention effect Intercellular CO 2 rose with external CO 2 in all species.
- Intervention effect Amaranthus flowered earlier at 700 than 350 CO 2.
- Intervention effect Setaria flowered later at 700 than other CO 2 levels.
- Intervention effect Abutilon tended to flower earlier without statistical significance.
- Intervention effect Ambrosia tended to flower earlier without statistical significance.
- Intervention effect Specific leaf area decreased consistently as CO 2 increased.
- Association CO 2 by species interactions occurred for leaf area, leaf biomass, reproductive-part biomass and seed biomass.
- Intervention effect Nitrogen proportion declined with CO 2 and its decline varied by species.
- Association Reproductive biomass responses to CO 2 differed among species, increasing in three species, unchanged in Setaria and peaking at intermediate CO 2 in Abutilon.