Abstract
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. 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. Dark respiration rates of these leaves were lowered by high CO2. The yellow portions of willow myrtle leaves showed a low level of photosynthetic activity which was stimulated by high CO2; however, dark respiration rates showed little response to elevated CO2. Green and yellow areas on variegated leaves of willow myrtle had much lower dark respiration rates than completely green leaves, but this difference was not evident for oleander. Yellow portions of oleander leaves showed little evidence of photosynthetic capacity. This was also confirmed by a low photochemical efficiency as determined by chlorophyll fluorescence. A major effect of variegation was to slow overall plant growth compared with completely green plants. The respective 3-fold and 6-7-fold differences in biomass between fully green and variegated cultivars of oleander and willow myrtle was closely related to estimated net carbon gain per day by the plant canopy. Variegation for both species averaged close to 50:50, green:yellow areas. Variegated plants developed about twice the leaf area ratio and specific leaf area compared with their completely green counterparts. The relative growth response to high CO2 was significantly greater for the variegated plants compared to the completely green plants.
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Claims 16
Claim · model-written summary
Photosynthesis of entirely green leaves of oleander was greatly stimulated by high CO2 with no evidence of acclimation
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”
Claim · model-written summary
Photosynthesis of entirely green leaves of willow myrtle was greatly stimulated by high CO2 with no evidence of acclimation
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”
Claim · model-written summary
Dark respiration rates of green oleander leaves were lowered by high CO2
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”
e3“Dark respiration rates of these leaves were lowered by high CO2”
Claim · model-written summary
Dark respiration rates of green willow myrtle leaves were lowered by high CO2
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”
e3“Dark respiration rates of these leaves were lowered by high CO2”
Claim · model-written summary
Yellow portions of willow myrtle leaves had low photosynthetic activity that was stimulated by high CO2
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”
e4“The yellow portions of willow myrtle leaves showed a low level of photosynthetic activity which was stimulated by high CO2; however, dark respiration rates showed little response to elevated CO2”
Claim · model-written summary
Dark respiration of yellow willow myrtle leaf portions showed little response to elevated CO2
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”
e4“The yellow portions of willow myrtle leaves showed a low level of photosynthetic activity which was stimulated by high CO2; however, dark respiration rates showed little response to elevated CO2”
Claim · model-written summary
Green and yellow areas on variegated willow myrtle leaves had much lower dark respiration rates than completely green leaves
Verbatim
e5“Green and yellow areas on variegated leaves of willow myrtle had much lower dark respiration rates than completely green leaves, but this difference was not evident for oleander”
Claim · model-written summary
The dark respiration difference between variegated and green oleander leaves was not evident
Verbatim
e5“Green and yellow areas on variegated leaves of willow myrtle had much lower dark respiration rates than completely green leaves, but this difference was not evident for oleander”
Claim · model-written summary
Yellow portions of oleander leaves showed little evidence of photosynthetic capacity
Verbatim
e6“Yellow portions of oleander leaves showed little evidence of photosynthetic capacity”
Claim · model-written summary
Yellow portions of oleander leaves had low photochemical efficiency as determined by chlorophyll fluorescence
Verbatim
e6“Yellow portions of oleander leaves showed little evidence of photosynthetic capacity”
e7“This was also confirmed by a low photochemical efficiency as determined by chlorophyll fluorescence”
Claim · model-written summary
Variegation slowed overall plant growth compared with completely green plants
Verbatim
t0“Photosynthetic and Growth Responses of Variegated Ornamental Species to Elevated CO2”
e1“A major effect of variegation was to slow overall plant growth compared with completely green plants”
Claim · model-written summary
The 3-fold biomass difference between fully green and variegated oleander was closely related to estimated net carbon gain per day by the canopy
- Taxon
- oleandere1
- Outcome
- biomasse1
- Value
- 3-folde1
- Qualifier
- closely related to estimated net carbon gain per daye1
- Comparator
- fully greene1
Not reportedDirection
Verbatim
e1“The respective 3-fold and 6-7-fold differences in biomass between fully green and variegated cultivars of oleander and willow myrtle was closely related to estimated net carbon gain per day by the plant canopy”
Claim · model-written summary
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
- Taxon
- willow myrtlee1
- Outcome
- biomasse1
- Value
- 6-7-folde1
- Qualifier
- closely related to estimated net carbon gain per daye1
- Comparator
- fully greene1
Not reportedDirection
Verbatim
e1“The respective 3-fold and 6-7-fold differences in biomass between fully green and variegated cultivars of oleander and willow myrtle was closely related to estimated net carbon gain per day by the plant canopy”
Claim · model-written summary
Variegated plants developed about twice the leaf area ratio and specific leaf area of completely green counterparts
Verbatim
e1“Variegated plants developed about twice the leaf area ratio and specific leaf area compared with their completely green counterparts”
Claim · model-written summary
The relative growth response to high CO2 was significantly greater in variegated plants than in completely green plants
Verbatim
e1“The relative growth response to high CO2 was significantly greater for the variegated plants compared to the completely green plants”
Claim · model-written summary
Variegation averaged close to 50:50 green to yellow areas in both species
Verbatim
t0“Photosynthetic and Growth Responses of Variegated Ornamental Species to Elevated CO2”
e1“Variegation for both species averaged close to 50:50, green:yellow areas”