Claim · model-written summary
Increasing light from 200 to 1000 PAR increased photosynthesis at both CO2 levels.
- Taxon
- Rosa hybrida
Rosa hybrid cultivare1 - Treatment
- Increasing the photon fluence flux rate from 200 to 1000 μmol·m -2 ·s -1 PARe0
- Outcome
- photosynthetic ratee0
- Direction
- increasede0
- Qualifier
- at 35 and 90 Pa CO 2e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the photon fluence flux rate from 200 to 1000 μmol·m -2 ·s -1 PAR increased the photosynthetic rate and the concurrent export rate at 35 and 90 Pa CO 2”
e1“Rosa hybrida L.”
Title
Jirong Jiao; Bernard Grodzinski Journal of the American Society for Horticultural Science 1998. doi:10.21273/jashs.123.6.1081
Other claims from this paper (11)
- Observation At both CO2 levels, stage 3 leaves had greater photosynthesis and carbon export than earlier stages.
- Observation Leaf photosynthesis and export were optimal near 25 °C at ambient CO2 and saturating light.
- Observation At 40 °C, photosynthesis was 40% lower.
- Observation At 40 °C, export during photosynthesis was reduced by 80%.
- Intervention effect Increasing light increased concurrent export at both CO2 levels.
- Observation At 35 Pa CO2, carbon export rose from 31% to 59% of fixation with increased irradiance.
- Observation At 90 Pa CO2, export rose from 38% to 62% of photosynthesis with increased irradiance.
- Observation Plants exported about three times as much fixed carbon in light as in dark chase.
- Intervention effect Elevated CO2 during feeding increased nighttime export and respiration relative to ambient CO2.
- Intervention effect CO2-enriched leaves retained more labeled carbon at the end of the dark chase.
- Intervention effect The fractions exported, respired, and retained in darkness were equal under high and ambient CO2.