Claim · model-written summary
Photosynthesis of entirely green leaves of oleander was greatly stimulated by high CO2 with no evidence of acclimation
- Taxon
- oleandere1
- Organ / stage
- entirely green leavese2
- Treatment
- high CO2e2
- Outcome
- Photosynthesise2
- Direction
- greatly stimulatede2
- Qualifier
- no evidence of downward adjustment (acclimation)e2
- Comparator
- ambient levels of CO2e1
- Setting
- controlled environment cabinetse1
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleValue
Verbatim
e1“Variegated and completely green cultivars of oleander (Nerium oleander L.) and willow myrtle (Agonis flexuosa (Willd.) Sweet) were grown in controlled environment cabinets for 3 and 5 months, respectively, under either ambient levels of CO2 or with supplementary CO2 to a partial pressure of 800 μbar”
e2“Photosynthesis of entirely green leaves and the green portions of variegated leaves on both species was greatly stimulated by high CO2 and there was no evidence of downward adjustment (acclimation) of photosynthetic rates to high CO2 during the experiment”
Title
Photosynthetic and Growth Responses of Variegated Ornamental Species to Elevated CO2
WJS Downton; WJR Grant Australian Journal of Plant Physiology 1994. doi:10.1071/pp9940273
Other claims from this paper (15)
- Intervention effect Photosynthesis of entirely green leaves of willow myrtle was greatly stimulated by high CO2 with no evidence of acclimation
- Intervention effect Dark respiration rates of green oleander leaves were lowered by high CO2
- Intervention effect Dark respiration rates of green willow myrtle leaves were lowered by high CO2
- Intervention effect Yellow portions of willow myrtle leaves had low photosynthetic activity that was stimulated by high CO2
- Intervention effect Dark respiration of yellow willow myrtle leaf portions showed little response to elevated CO2
- Intervention effect Green and yellow areas on variegated willow myrtle leaves had much lower dark respiration rates than completely green leaves
- Intervention effect The dark respiration difference between variegated and green oleander leaves was not evident
- Observation Yellow portions of oleander leaves showed little evidence of photosynthetic capacity
- Observation Yellow portions of oleander leaves had low photochemical efficiency as determined by chlorophyll fluorescence
- Intervention effect Variegation slowed overall plant growth compared with completely green plants
- Association The 3-fold biomass difference between fully green and variegated oleander was closely related to estimated net carbon gain per day by the canopy
- Association The 6-7-fold biomass difference between fully green and variegated willow myrtle was closely related to estimated net carbon gain per day by the canopy
- Observation Variegated plants developed about twice the leaf area ratio and specific leaf area of completely green counterparts
- Intervention effect The relative growth response to high CO2 was significantly greater in variegated plants than in completely green plants
- Observation Variegation averaged close to 50:50 green to yellow areas in both species