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Oula Ghannoum - One of the best experts on this subject based on the ideXlab platform.
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panicum milioides c3 c4 does not have improved water or nitrogen economies relative to c3 and c4 congeners exposed to Industrial Age climate change
Journal of Experimental Botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
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Panicum milioides (C3–C4) does not have improved water or nitrogen economies relative to C3 and C4 congeners exposed to Industrial-Age climate change
Journal of experimental botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
David T Tissue - One of the best experts on this subject based on the ideXlab platform.
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impacts of drought on leaf respiration in darkness and light in eucalyptus saligna exposed to Industrial Age atmospheric co2 and growth temperature
New Phytologist, 2011Co-Authors: Gohar Ayub, Renee Smith, David T Tissue, Owen K AtkinAbstract:Summary • Our study assessed the impact of a wide range of Industrial-Age climate scenarios on leaf respiration (R )i nEucalyptus saligna. • Well-watered or sustained drought-treated plants were grown in glasshouses differing in atmospheric CO2 concentration ([CO2]) (280, 400 and 640 l ll )1 ) and temperature (26 and 30� C). Rates of R in darkness (Rdark) and light (Rlight), photosynthesis (A) and related leaf traits (mass : area relationships, and nitrogen, phosphorus, starch and sugar concentrations) were measured. • Light inhibited R in all cases (Rlight < Rdark) (well-watered: 40%; droughttreated: 73%). Growth [CO2] and temperature had little impact on area-based rates of Rdark or Rlight, with Rlight exhibiting minimal thermal acclimation. By contrast, sustained drought resulted in reduced Rdark, Rlight and A, with the inhibitory effect of drought on A and Rlight (c. 50–70%) greater than that on Rdark (c. 15%). Drought effects were fully reversible after watering. Variability in Rlight appeared to be dependent on the underlying rate of Rdark and associated Rubisco activity. • Collectively, our data suggest that there is an asynchronous response of leaf carbon metabolism to drought, and a tighter coupling between Rlight and A than between Rdark and A, under both past and future climate scenarios. These findings have important implications for ecosystem ⁄ global models seeking to predict carbon cycling.
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panicum milioides c3 c4 does not have improved water or nitrogen economies relative to c3 and c4 congeners exposed to Industrial Age climate change
Journal of Experimental Botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
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Impacts of drought on leaf respiration in darkness and light in Eucalyptus saligna exposed to Industrial‐Age atmospheric CO2 and growth temperature
The New phytologist, 2011Co-Authors: Gohar Ayub, Renee Smith, David T Tissue, Owen K AtkinAbstract:Summary • Our study assessed the impact of a wide range of Industrial-Age climate scenarios on leaf respiration (R )i nEucalyptus saligna. • Well-watered or sustained drought-treated plants were grown in glasshouses differing in atmospheric CO2 concentration ([CO2]) (280, 400 and 640 l ll )1 ) and temperature (26 and 30� C). Rates of R in darkness (Rdark) and light (Rlight), photosynthesis (A) and related leaf traits (mass : area relationships, and nitrogen, phosphorus, starch and sugar concentrations) were measured. • Light inhibited R in all cases (Rlight < Rdark) (well-watered: 40%; droughttreated: 73%). Growth [CO2] and temperature had little impact on area-based rates of Rdark or Rlight, with Rlight exhibiting minimal thermal acclimation. By contrast, sustained drought resulted in reduced Rdark, Rlight and A, with the inhibitory effect of drought on A and Rlight (c. 50–70%) greater than that on Rdark (c. 15%). Drought effects were fully reversible after watering. Variability in Rlight appeared to be dependent on the underlying rate of Rdark and associated Rubisco activity. • Collectively, our data suggest that there is an asynchronous response of leaf carbon metabolism to drought, and a tighter coupling between Rlight and A than between Rdark and A, under both past and future climate scenarios. These findings have important implications for ecosystem ⁄ global models seeking to predict carbon cycling.
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Panicum milioides (C3–C4) does not have improved water or nitrogen economies relative to C3 and C4 congeners exposed to Industrial-Age climate change
Journal of experimental botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
Harshini Pinto - One of the best experts on this subject based on the ideXlab platform.
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panicum milioides c3 c4 does not have improved water or nitrogen economies relative to c3 and c4 congeners exposed to Industrial Age climate change
Journal of Experimental Botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
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Panicum milioides (C3–C4) does not have improved water or nitrogen economies relative to C3 and C4 congeners exposed to Industrial-Age climate change
Journal of experimental botany, 2011Co-Authors: Harshini Pinto, David T Tissue, Oula GhannoumAbstract:The physiological implications of C3–C4 photosynthesis were investigated using closely related Panicum species exposed to Industrial-Age climate change. Panicum bisulcatum (C3), P. milioides (C3–C4), and P. coloratum (C4) were grown in a glasshouse at three CO2 concentrations ([CO2]: 280, 400, and 650 m ll 21 ) and two air temperatures [ambient (27/19 � C day/night) and ambient + 4 � C] for 12 weeks. Under current ambient [CO2] and temperature, the C3–C4 species had higher photosynthetic rates and lower stomatal limitation and electron cost of photosynthesis relative to the C3 species. These photosynthetic advantAges did not improve leaf- or plant-level water (WUE) or nitrogen (NUE) use efficiencies of the C3–C4 relative to the C3 Panicum species. In contrast, the C4 species had higher photosynthetic rates and WUE but similar NUE to the C3 species. Increasing [CO2] mainly stimulated photosynthesis of the C3 and C3–C4 species, while high temperature had no or negative effects on photosynthesis of the Panicum species. Under ambient temperature, increasing [CO2] enhanced the biomass of the C3 species only. Under high temperature, increasing [CO2] enhanced the biomass of the C3 and C3–C4 species to the same extent, indicating increased CO2 limitation in the C3–C4 intermediate at high temperature. Growth [CO2] and temperature had complex interactive effects, but did not alter the ranking of key physiological parameters amongst the Panicum species. In conclusion, the ability of C3–C4 intermediate species partially to recycle photorespired CO2 did not improve WUE or NUE relative to congeneric C3 or C4 species grown under varying [CO2] and temperature conditions.
Owen K Atkin - One of the best experts on this subject based on the ideXlab platform.
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impacts of drought on leaf respiration in darkness and light in eucalyptus saligna exposed to Industrial Age atmospheric co2 and growth temperature
New Phytologist, 2011Co-Authors: Gohar Ayub, Renee Smith, David T Tissue, Owen K AtkinAbstract:Summary • Our study assessed the impact of a wide range of Industrial-Age climate scenarios on leaf respiration (R )i nEucalyptus saligna. • Well-watered or sustained drought-treated plants were grown in glasshouses differing in atmospheric CO2 concentration ([CO2]) (280, 400 and 640 l ll )1 ) and temperature (26 and 30� C). Rates of R in darkness (Rdark) and light (Rlight), photosynthesis (A) and related leaf traits (mass : area relationships, and nitrogen, phosphorus, starch and sugar concentrations) were measured. • Light inhibited R in all cases (Rlight < Rdark) (well-watered: 40%; droughttreated: 73%). Growth [CO2] and temperature had little impact on area-based rates of Rdark or Rlight, with Rlight exhibiting minimal thermal acclimation. By contrast, sustained drought resulted in reduced Rdark, Rlight and A, with the inhibitory effect of drought on A and Rlight (c. 50–70%) greater than that on Rdark (c. 15%). Drought effects were fully reversible after watering. Variability in Rlight appeared to be dependent on the underlying rate of Rdark and associated Rubisco activity. • Collectively, our data suggest that there is an asynchronous response of leaf carbon metabolism to drought, and a tighter coupling between Rlight and A than between Rdark and A, under both past and future climate scenarios. These findings have important implications for ecosystem ⁄ global models seeking to predict carbon cycling.
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Impacts of drought on leaf respiration in darkness and light in Eucalyptus saligna exposed to Industrial‐Age atmospheric CO2 and growth temperature
The New phytologist, 2011Co-Authors: Gohar Ayub, Renee Smith, David T Tissue, Owen K AtkinAbstract:Summary • Our study assessed the impact of a wide range of Industrial-Age climate scenarios on leaf respiration (R )i nEucalyptus saligna. • Well-watered or sustained drought-treated plants were grown in glasshouses differing in atmospheric CO2 concentration ([CO2]) (280, 400 and 640 l ll )1 ) and temperature (26 and 30� C). Rates of R in darkness (Rdark) and light (Rlight), photosynthesis (A) and related leaf traits (mass : area relationships, and nitrogen, phosphorus, starch and sugar concentrations) were measured. • Light inhibited R in all cases (Rlight < Rdark) (well-watered: 40%; droughttreated: 73%). Growth [CO2] and temperature had little impact on area-based rates of Rdark or Rlight, with Rlight exhibiting minimal thermal acclimation. By contrast, sustained drought resulted in reduced Rdark, Rlight and A, with the inhibitory effect of drought on A and Rlight (c. 50–70%) greater than that on Rdark (c. 15%). Drought effects were fully reversible after watering. Variability in Rlight appeared to be dependent on the underlying rate of Rdark and associated Rubisco activity. • Collectively, our data suggest that there is an asynchronous response of leaf carbon metabolism to drought, and a tighter coupling between Rlight and A than between Rdark and A, under both past and future climate scenarios. These findings have important implications for ecosystem ⁄ global models seeking to predict carbon cycling.
Scott L. Anderson - One of the best experts on this subject based on the ideXlab platform.
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Ossianic unconformities: Bardic poetry in the Industrial Age
Social & Cultural Geography, 2015Co-Authors: Scott L. AndersonAbstract:For those unfamiliar with the languAge of modern literary criticism, Eric Gidal’s Ossianic Unconformities: Bardic Poetry in the Industrial Age can be very heavy going. This is unfortunate, because ...