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Yusuke Onoda - One of the best experts on this subject based on the ideXlab platform.
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temperature acclimation of photosynthesis mechanisms involved in the changes in temperature dependence of photosynthetic rate
Journal of Experimental Botany, 2006Co-Authors: Kouki Hikosaka, Kazumasa Ishikawa, Almaz Borjigidai, Onno Muller, Yusuke OnodaAbstract:Growth temperature alters temperature dependence of the photosynthetic rate (temperature acclimation). In many species, the optimal temperature that maximizes the photosynthetic rate increases with increasing growth temperature. In this minireview, mechanisms involved in changes in the photosynthesis–temperature curve are discussed. Based on the biochemical model of photosynthesis, change in the photosynthesis– temperature curve is attributable to four factors: intercellular CO2 concentration, activation energy of the maximum rate of RuBP (ribulose-1,5-bisphosphate) carboxylation (Vc max), activation energy of the rate of RuBP regeneration (Jmax), and the ratio of Jmax to Vc max. In the survey, every species increased the activation energy of Vc max with increasing growth temperature. Other factors changed with growth temperature, but their responses were different among species. Among these factors, activation energy of Vc max may be the most important for the shift of optimal temperature of photosynthesis at ambient CO2 concentrations. Physiological and biochemical causes for the change in these parameters are discussed.
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the balance between rubp carboxylation and rubp regeneration a mechanism underlying the interspecific variation in acclimation of photosynthesis to seasonal change in temperature
Functional Plant Biology, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The ratio of the capacities of ribulose-1,5-bisphosphate (RuBP) regeneration to RuBP carboxylation (Jmax / Vcmax) (measured at a common temperature) increases in some species when they are grown at lower temperatures, but does not increase in other species. To investigate the mechanism of interspecific difference in the response of Jmax / Vcmax to growth temperature, we analysed the temperature dependence of Vcmax and Jmax in Polygonum cuspidatum and Fagus crenata with the Arrhenius function. P. cuspidatum had a higher ratio of Jmax / Vcmax in spring and autumn than in summer, while F. crenata did not show such change. The two species had a similar activation energy for Vcmax (EaV) across seasons, but P. cuspidatum had a higher activation energy for Jmax (EaJ) than F. crenata. Reconstruction of the temperature response curve of photosynthesis showed that plants with an inherently higher EaJ / EaV (P. cuspidatum) had photosynthetic rates that were limited by RuBP regeneration at low temperatures and limited by RuBP carboxylation at high temperatures, while plants with an inherently lower EaJ / EaV (F. crenata) had photosynthetic rates that were limited solely by RuBP carboxylation over the range of temperatures. These results indicate that the increase in Jmax / Vcmax at low growth temperatures relieved the limitation of RuBP regeneration on the photosynthetic rate in P. cuspidatum, but that such change in Jmax / Vcmax would not improve the photosynthetic rate in F. crenata. We suggest that whether or not the Jmax / Vcmax ratio changes with growth temperature is attributable to interspecific differences in EaJ / EaV between species.
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seasonal change in the balance between capacities of rubp carboxylation and rubp regeneration affects co2 response of photosynthesis in polygonum cuspidatum
Journal of Experimental Botany, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The balance between the capacities of RuBP (ribulose1,5-bisphosphate) carboxylation (Vcmax) and RuBP regeneration (expressed as the maximum electron transport rate, Jmax) determines the CO2 dependence of the photosynthetic rate. As it has been suggested that this balance changes depending on the growth temperature, the hypothesis that the seasonal change in air temperature affects the balance and modulates the CO2 response of photosynthesis was tested. Vcmax and Jmax were determined in summer and autumn for young and old leaves of Polygonum cuspidatum grown at two CO2 concentrations (370 and 700 lmol mol 21 ). Elevated CO2 concentration tended to reduce both Vcmax and Jmax without changing the Jmax:Vcmax ratio. The seasonal environment, on the other hand, altered the ratio such that the Jmax:Vcmax ratio was higher in autumn leaves than summer leaves. This alternation made the photosynthetic rate more dependent on CO2 concentration in autumn. Therefore, when photosynthetic rates were compared at growth CO2 concentration, the stimulation in photosynthetic rate was higher in young-autumn than in young-summer leaves. In old-autumn leaves, the stimulation of photosynthesis brought by a change in the Jmax:Vcmax ratio was partly offset by accelerated leaf senescence under elevated CO2. Across the two seasons and the two CO2 concentrations, Vcmax was strongly correlated with Rubisco and Jmax with cytochrome f content. These results suggest that seasonal
Tadaki Hirose - One of the best experts on this subject based on the ideXlab platform.
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the balance between rubp carboxylation and rubp regeneration a mechanism underlying the interspecific variation in acclimation of photosynthesis to seasonal change in temperature
Functional Plant Biology, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The ratio of the capacities of ribulose-1,5-bisphosphate (RuBP) regeneration to RuBP carboxylation (Jmax / Vcmax) (measured at a common temperature) increases in some species when they are grown at lower temperatures, but does not increase in other species. To investigate the mechanism of interspecific difference in the response of Jmax / Vcmax to growth temperature, we analysed the temperature dependence of Vcmax and Jmax in Polygonum cuspidatum and Fagus crenata with the Arrhenius function. P. cuspidatum had a higher ratio of Jmax / Vcmax in spring and autumn than in summer, while F. crenata did not show such change. The two species had a similar activation energy for Vcmax (EaV) across seasons, but P. cuspidatum had a higher activation energy for Jmax (EaJ) than F. crenata. Reconstruction of the temperature response curve of photosynthesis showed that plants with an inherently higher EaJ / EaV (P. cuspidatum) had photosynthetic rates that were limited by RuBP regeneration at low temperatures and limited by RuBP carboxylation at high temperatures, while plants with an inherently lower EaJ / EaV (F. crenata) had photosynthetic rates that were limited solely by RuBP carboxylation over the range of temperatures. These results indicate that the increase in Jmax / Vcmax at low growth temperatures relieved the limitation of RuBP regeneration on the photosynthetic rate in P. cuspidatum, but that such change in Jmax / Vcmax would not improve the photosynthetic rate in F. crenata. We suggest that whether or not the Jmax / Vcmax ratio changes with growth temperature is attributable to interspecific differences in EaJ / EaV between species.
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seasonal change in the balance between capacities of rubp carboxylation and rubp regeneration affects co2 response of photosynthesis in polygonum cuspidatum
Journal of Experimental Botany, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The balance between the capacities of RuBP (ribulose1,5-bisphosphate) carboxylation (Vcmax) and RuBP regeneration (expressed as the maximum electron transport rate, Jmax) determines the CO2 dependence of the photosynthetic rate. As it has been suggested that this balance changes depending on the growth temperature, the hypothesis that the seasonal change in air temperature affects the balance and modulates the CO2 response of photosynthesis was tested. Vcmax and Jmax were determined in summer and autumn for young and old leaves of Polygonum cuspidatum grown at two CO2 concentrations (370 and 700 lmol mol 21 ). Elevated CO2 concentration tended to reduce both Vcmax and Jmax without changing the Jmax:Vcmax ratio. The seasonal environment, on the other hand, altered the ratio such that the Jmax:Vcmax ratio was higher in autumn leaves than summer leaves. This alternation made the photosynthetic rate more dependent on CO2 concentration in autumn. Therefore, when photosynthetic rates were compared at growth CO2 concentration, the stimulation in photosynthetic rate was higher in young-autumn than in young-summer leaves. In old-autumn leaves, the stimulation of photosynthesis brought by a change in the Jmax:Vcmax ratio was partly offset by accelerated leaf senescence under elevated CO2. Across the two seasons and the two CO2 concentrations, Vcmax was strongly correlated with Rubisco and Jmax with cytochrome f content. These results suggest that seasonal
Peter B Reich - One of the best experts on this subject based on the ideXlab platform.
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short and long term responses of photosynthetic capacity to temperature in four boreal tree species in a free air warming and rainfall manipulation experiment
Tree Physiology, 2020Co-Authors: Raimundo Bermudez, Rebecca A Montgomery, Artur Stefanski, Peter B ReichAbstract:High latitude forests cope with considerable variation in moisture and temperature at multiple temporal scales. To assess how their photosynthetic physiology responds to short- and long-term temperature variation, we measured photosynthetic capacity for four tree species growing in an open-air experiment in the boreal-temperate ecotone `Boreal Forest Warming at an Ecotone in Danger' (B4WarmED). The experiment factorially manipulated temperature above- and below-ground (ambient, +3.2 °C) and summer rainfall (ambient, 40% removal). We measured A/Ci curves at 18, 25 and 32 °C for individuals of two boreal (Pinus banksiana Lamb., Betula papyrifera Marsh.) and two temperate species (Pinus strobus L., Acer rubrum L.) experiencing the long-term warming and/or reduced-rainfall conditions induced by our experimental treatments. We calculated the apparent photosynthetic capacity descriptors VCmax,Ci and Jmax,Ci and their ratio for each measurement temperate. We hypothesized that (i) VCmax,Ci and Jmax,Ci would be down-regulated in plants experiencing longer term (e.g., weeks to months) warming and reduced rainfall (i.e., have lower values at a given measurement temperature), as is sometimes found in the literature, and that (ii) plants growing at warmer temperatures or from warmer ranges would show greater sensitivity (steeper slope) to short-term (minutes to hours) temperature variation. Neither hypothesis was supported as a general trend across the four species, as there was not a significant main effect (across species) of either warming or rainfall reduction on VCmax,Ci and Jmax,Ci. All species markedly increased VCmax,Ci and Jmax,Ci (and decreased their ratio) with short-term increases in temperature (i.e., contrasting values at 18, 25 and 32 °C), and those responses were independent of long-term treatments and did not differ among species. The Jmax,Ci:VCmax,Ci ratio was, however, significantly lower across species in warmed and reduced rainfall treatments. Collectively, these results suggest that boreal trees possess considerable short-term plasticity that may allow homeostasis of VCmax,Ci and Jmax,Ci to a longer term temperature treatment. Our results also caution against extrapolating results obtained under controlled and markedly contrasting temperature treatments to responses of photosynthetic parameters to more modest temperature changes expected in the near-term with climate warming in field conditions.
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relationships of leaf dark respiration to leaf nitrogen specific leaf area and leaf life span a test across biomes and functional groups
Oecologia, 1998Co-Authors: Peter B Reich, David S Ellsworth, M B Walters, James M Vose, John C Volin, Charles A Gresham, William D BowmanAbstract:Based on prior evidence of coordinated multiple leaf trait scaling, we hypothesized that variation among species in leaf dark respiration rate (Rd) should scale with variation in traits such as leaf nitrogen (N), leaf life-span, specific leaf area (SLA), and net photosynthetic capacity (/4max)- However, it is not known whether such scaling, if it exists, is similar among disparate biomes and plant functional types. We tested this idea by examining the interspecific relationships between Rd measured at a standard temperature and leaf life-span, N, SLA and ^max for 69 species from four functional groups (forbs, broad-leafed trees and shrubs, and needle-leafed coni- fers) in six biomes traversing the Americas: alpine tun- dra/subalpine forest, was positively related to area-based leaf N within functional groups and for all species pooled, but not when comparing among species within any site. At all sites, mass-based Rd (Rd.mass) de- creased sharply with increasing leaf life-span and was positively related to SLA and mass-based Amax and leaf
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different photosynthesis nitrogen relations in deciduous hardwood and evergreen coniferous tree species
Oecologia, 1995Co-Authors: Peter B Reich, M B Walters, Brian D Kloeppel, David S EllsworthAbstract:The relationship between photosynthetic capacity (Amax) and leaf nitrogen concentration (N) among all C3 species can be described roughly with one general equation, yet within that overall pattern species groups or individual species may have markedly different Amax-N relationships. To determine whether one or several predictive, fundamental Amax-N relationships exist for temperate trees we measured Amax, specific leaf area (SLA) and N in 22 broad-leaved deciduous and 9 needle-leaved evergreen tree species in Wisconsin, United States. For broad-leaved deciduous trees, mass-based Amax was highly correlated with leaf N (r2=0.75, P 0.25) in the evergreen conifers. Compared to deciduous trees at a common leaf N (mass or area basis), evergreen trees had lower Amax and SLA. For all data pooled, both leaf N and Amax on a mass basis were correlated (r2=0.6) with SLA; in contrast, area-based leaf N scaled tightly with SLA (r2=0.81), but area-based Amax did not (r2=0.06) because of low Amax per unit N in the evergreen conifers. Multiple regression analysis of all data pooled showed that both N (mass or area basis) and SLA were significantly (P<0.001) related to Amax on mass (r2=0.80) and area (r2=0.55) bases, respectively. These results provide further evidence that Amax-N relationships are fundamentally different for ecologically distinct species groups with differing suites of foliage characteristics: species with long leaf life-spans and low SLA, whether broad-leaved or needle-leaved, tend to have lower Amax per unit leaf N and a lower slope and higher intercept of the Amax-N relation than do species with shorter leaf life-span and higher SLA. A single global Amax-N equation overestimates and underestimates Amax for temperate trees at the upper and lower end of their leaf N range, respectively. Users of Amax-N relationships in modeling photosynthesis in different ecosystems should appreciate the strengths and limitations of regression equations based on different species groupings.
Kouki Hikosaka - One of the best experts on this subject based on the ideXlab platform.
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temperature acclimation of photosynthesis mechanisms involved in the changes in temperature dependence of photosynthetic rate
Journal of Experimental Botany, 2006Co-Authors: Kouki Hikosaka, Kazumasa Ishikawa, Almaz Borjigidai, Onno Muller, Yusuke OnodaAbstract:Growth temperature alters temperature dependence of the photosynthetic rate (temperature acclimation). In many species, the optimal temperature that maximizes the photosynthetic rate increases with increasing growth temperature. In this minireview, mechanisms involved in changes in the photosynthesis–temperature curve are discussed. Based on the biochemical model of photosynthesis, change in the photosynthesis– temperature curve is attributable to four factors: intercellular CO2 concentration, activation energy of the maximum rate of RuBP (ribulose-1,5-bisphosphate) carboxylation (Vc max), activation energy of the rate of RuBP regeneration (Jmax), and the ratio of Jmax to Vc max. In the survey, every species increased the activation energy of Vc max with increasing growth temperature. Other factors changed with growth temperature, but their responses were different among species. Among these factors, activation energy of Vc max may be the most important for the shift of optimal temperature of photosynthesis at ambient CO2 concentrations. Physiological and biochemical causes for the change in these parameters are discussed.
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the balance between rubp carboxylation and rubp regeneration a mechanism underlying the interspecific variation in acclimation of photosynthesis to seasonal change in temperature
Functional Plant Biology, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The ratio of the capacities of ribulose-1,5-bisphosphate (RuBP) regeneration to RuBP carboxylation (Jmax / Vcmax) (measured at a common temperature) increases in some species when they are grown at lower temperatures, but does not increase in other species. To investigate the mechanism of interspecific difference in the response of Jmax / Vcmax to growth temperature, we analysed the temperature dependence of Vcmax and Jmax in Polygonum cuspidatum and Fagus crenata with the Arrhenius function. P. cuspidatum had a higher ratio of Jmax / Vcmax in spring and autumn than in summer, while F. crenata did not show such change. The two species had a similar activation energy for Vcmax (EaV) across seasons, but P. cuspidatum had a higher activation energy for Jmax (EaJ) than F. crenata. Reconstruction of the temperature response curve of photosynthesis showed that plants with an inherently higher EaJ / EaV (P. cuspidatum) had photosynthetic rates that were limited by RuBP regeneration at low temperatures and limited by RuBP carboxylation at high temperatures, while plants with an inherently lower EaJ / EaV (F. crenata) had photosynthetic rates that were limited solely by RuBP carboxylation over the range of temperatures. These results indicate that the increase in Jmax / Vcmax at low growth temperatures relieved the limitation of RuBP regeneration on the photosynthetic rate in P. cuspidatum, but that such change in Jmax / Vcmax would not improve the photosynthetic rate in F. crenata. We suggest that whether or not the Jmax / Vcmax ratio changes with growth temperature is attributable to interspecific differences in EaJ / EaV between species.
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seasonal change in the balance between capacities of rubp carboxylation and rubp regeneration affects co2 response of photosynthesis in polygonum cuspidatum
Journal of Experimental Botany, 2005Co-Authors: Yusuke Onoda, Kouki Hikosaka, Tadaki HiroseAbstract:The balance between the capacities of RuBP (ribulose1,5-bisphosphate) carboxylation (Vcmax) and RuBP regeneration (expressed as the maximum electron transport rate, Jmax) determines the CO2 dependence of the photosynthetic rate. As it has been suggested that this balance changes depending on the growth temperature, the hypothesis that the seasonal change in air temperature affects the balance and modulates the CO2 response of photosynthesis was tested. Vcmax and Jmax were determined in summer and autumn for young and old leaves of Polygonum cuspidatum grown at two CO2 concentrations (370 and 700 lmol mol 21 ). Elevated CO2 concentration tended to reduce both Vcmax and Jmax without changing the Jmax:Vcmax ratio. The seasonal environment, on the other hand, altered the ratio such that the Jmax:Vcmax ratio was higher in autumn leaves than summer leaves. This alternation made the photosynthetic rate more dependent on CO2 concentration in autumn. Therefore, when photosynthetic rates were compared at growth CO2 concentration, the stimulation in photosynthetic rate was higher in young-autumn than in young-summer leaves. In old-autumn leaves, the stimulation of photosynthesis brought by a change in the Jmax:Vcmax ratio was partly offset by accelerated leaf senescence under elevated CO2. Across the two seasons and the two CO2 concentrations, Vcmax was strongly correlated with Rubisco and Jmax with cytochrome f content. These results suggest that seasonal
David T. Tissue - One of the best experts on this subject based on the ideXlab platform.
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photosynthetic responses of two eucalypts to industrial age changes in atmospheric co2 and temperature
Plant Cell and Environment, 2010Co-Authors: Oula Ghannoum, Nathan Phillips, Marie A Sears, Barry A Logan, James D Lewis, Jann P Conroy, David T. TissueAbstract:The unabated rise in atmospheric (CO2) is associated with increased air temperature.Yet,few CO2-enrichment studies have considered pre-industrial (CO2) or warming. Conse- quently, we quantified the interactive effects of growth (CO2) and temperature on photosynthesis of faster-growing Eucalyptus saligna and slower-growing E. sideroxylon. Well-watered and -fertilized tree seedlings were grown in a glasshouse at three atmospheric (CO2) (290, 400, and 650 m LL -1 ), and ambient (26/18 °C, day/night) and high (ambient + 4 °C) air temperature. Despite differences in growth rate, both eucalypts responded similarly to (CO2) and temperature treatments with few interactive effects. Light-saturated photosynthesis (Asat) and light- and (CO2)-saturated photosynthesis (Amax) increased by ~50% and ~10%, respectively, with each step-increase in growth (CO2), underpinned by a corresponding 6-11% up-regulation of maximal electron transport rate (Jmax). Maximal carboxylation rate (Vcmax) was not affected by growth (CO2). Thermal photosynthetic acclimation occurred such that Asat and Amax were similar in ambient- and high-temperature-grown plants. At high temperature, the thermal optimum of Asat increased by 2-7 °C across (CO2) treatments. These results are the first to suggest that photosynthesis of well-watered and -fertilized eucalypt seedlings will remain strongly responsive to increasing atmospheric (CO2) in a future, warmer climate.
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persistent stimulation of photosynthesis by elevated co2 in a sweetgum liquidambar styraciflua forest stand
New Phytologist, 2004Co-Authors: Johnna D Sholtis, Carla A Gunderson, Richard J Norby, David T. TissueAbstract:Summary • The photosynthetic response of trees to rising CO2 concentrations ([CO2]) can be affected by plant source–sink relations, in addition to seasonal changes in environmental conditions. Characterization of biochemical and morphological feedbacks is important for understanding ecosystem responses to elevated atmospheric [CO2]. • The seasonal responses of leaf gas exchange and related biochemical parameters were measured during 3 yrs of exposure on established plantation sweetgum (Liquidambar styraciflua) trees at a Free-Air CO2 Enrichment (FACE) facility in eastern Tennessee, USA. • Net photosynthetic rates (Agrowth) of upper-canopy leaves were 44% higher in trees grown in elevated [CO2] compared with ambient [CO2] over the 3-yr period. There were no significant CO2 treatment effects on photosynthetic or biochemical capacity (i.e. no change in Amax, Vcmax or Jmax) of L. styraciflua leaves, despite increased area-based leaf sugar (10%) and starch content (27%), and reduced mass-based leaf nitrogen concentration (NM; 10%). • These results suggest that established L. styraciflua trees in closed-canopy forests might exhibit a long-term positive response to elevated [CO2] without reductions in photosynthetic capacity.