A compendium of temperature responses of Rubisco kinetic traits: variability among and within photosynthetic groups and impacts on photosynthesis modeling

Galmés, Jeroni; Hermida-Carrera, Carmen; Laanisto, Lauri; Niinemets, Ülo

doi:10.1093/jxb/erw267

Cited by 83 publications

(122 citation statements)

References 119 publications

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“…It is thus strongly recommended that the use of “standard” Rubisco kinetics from tobacco is avoided when modeling photosynthesis in other species. As obtaining in vivo Rubisco kinetics for different species is not achievable in the short-term, we propose to use in vitro kinetics as determined by the methods explained here and elsewhere (Kane et al, 1994; Ruuska et al, 1998; Parry et al, 2007; Shay and Kubien, 2013; Perdomo, 2015; Galmés et al, 2016; Orr et al, 2016; Prins et al, 2016) as a first proxy for in vivo kinetics.…”

Section: Discussionmentioning

confidence: 99%

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

et al. 2016

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The impact of the combined effects of heat stress, increased vapor pressure deficit (VPD) and water deficit on the physiology of major crops needs to be better understood to help identifying the expected negative consequences of climate change and heat waves on global agricultural productivity. To address this issue, rice, wheat, and maize plants were grown under control temperature (CT, 25°C, VPD 1.8 kPa), and a high temperature (HT, 38°C, VPD 3.5 kPa), both under well-watered (WW) and water deficit (WD) conditions. Gas-exchange measurements showed that, in general, WD conditions affected the leaf conductance to CO2, while growth at HT had a more marked effect on the biochemistry of photosynthesis. When combined, HT and WD had an additive effect in limiting photosynthesis. The negative impacts of the imposed treatments on the processes governing leaf gas-exchange were species-dependent. Wheat presented a higher sensitivity while rice and maize showed a higher acclimation potential to increased temperature. Rubisco and PEPC kinetic constants determined in vitro at 25°C and 38°C were used to estimate Vcmax, Jmax, and Vpmax in the modeling of C3 and C4 photosynthesis. The results here obtained reiterate the need to use species-specific and temperature-specific values for Rubisco and PEPC kinetic constants for a precise parameterization of the photosynthetic response to changing environmental conditions in different crop species.

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Section: Discussionmentioning

confidence: 99%

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

et al. 2016

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“…Γ* and K are temperature‐dependent following Arrhenius relationships as measured for example, by Bernacchi, Singsaas, Pimentel, Portis, and Long (). Acknowledging that Rubisco kinetics traits vary both within and among species, we applied various Rubisco catalytic constants (the Michaelis–Menten coefficients for carboxylation and oxygenation, and the Rubisco specificity factor) provided by Galmés, Hermida‐Carrera, Laanisto and Niinemets () to estimate the uncertainties (±1 SD ) in K , Γ* and their instantaneous thermal responses.…”

Section: Methodsmentioning

confidence: 99%

Acclimation of leaf respiration consistent with optimal photosynthetic capacity

Wang

Atkin

Keenan

et al. 2020

Global Change Biology

132

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Plant respiration is an important contributor to the proposed positive global carbon‐cycle feedback to climate change. However, as a major component, leaf mitochondrial (‘dark’) respiration (Rd) differs among species adapted to contrasting environments and is known to acclimate to sustained changes in temperature. No accepted theory explains these phenomena or predicts its magnitude. Here we propose that the acclimation of Rd follows an optimal behaviour related to the need to maintain long‐term average photosynthetic capacity (Vcmax) so that available environmental resources can be most efficiently used for photosynthesis. To test this hypothesis, we extend photosynthetic co‐ordination theory to predict the acclimation of Rd to growth temperature via a link to Vcmax, and compare predictions to a global set of measurements from 112 sites spanning all terrestrial biomes. This extended co‐ordination theory predicts that field‐measured Rd and Vcmax accessed at growth temperature (Rd,tg and Vcmax,tg) should increase by 3.7% and 5.5% per degree increase in growth temperature. These acclimated responses to growth temperature are less steep than the corresponding instantaneous responses, which increase 8.1% and 9.9% per degree of measurement temperature for Rd and Vcmax respectively. Data‐fitted responses proof indistinguishable from the values predicted by our theory, and smaller than the instantaneous responses. Theory and data are also shown to agree that the basal rates of both Rd and Vcmax assessed at 25°C (Rd,25 and Vcmax,25) decline by ~4.4% per degree increase in growth temperature. These results provide a parsimonious general theory for Rd acclimation to temperature that is simpler—and potentially more reliable—than the plant functional type‐based leaf respiration schemes currently employed in most ecosystem and land‐surface models.

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“…Recent large species comparisons of Rubisco kinetic properties revealed significant differences even between closely related species (Orr et al ., ), highlighting the fact that these differences are not only an artifact of differences in measurement protocols. Modeled Rubisco‐limited CO 2 assimilation rates strongly depend on the Rubisco kinetic constants used, especially at high temperatures (Galmés et al ., ). The differences in these constants also contribute to a high variability in the temperature response of the maximum rate of Rubisco carboxylation ( V cmax ) and photosynthetic electron transport ( J max ) (Fig.…”

Section: Introductionmentioning

confidence: 97%

The sensitivity of photosynthesis to O₂ and CO₂ concentration identifies strong Rubisco control above the thermal optimum

Busch

Sage

2016

New Phytologist

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The biochemical model of C photosynthesis by Farquhar, von Caemmerer and Berry (FvCB) assumes that photosynthetic CO assimilation is limited by one of three biochemical processes that are not always easily discerned. This leads to improper assessments of biochemical limitations that limit the accuracy of the model predictions. We use the sensitivity of rates of CO assimilation and photosynthetic electron transport to changes in O and CO concentration in the chloroplast to evaluate photosynthetic limitations. Assessing the sensitivities to O and CO concentrations reduces the impact of uncertainties in the fixed parameters to a minimum and simultaneously entirely eliminates the need to determine the variable parameters of the model, such as V , J, or T . Our analyses demonstrate that Rubisco limits carbon assimilation at high temperatures, while it is limited by triose phosphate utilization at lower temperatures and at higher CO concentrations. Measurements can be assigned a priori to one of the three functions of the FvCB model, allowing testing for the suitability of the selected fixed parameters of the model. This approach can improve the reliability of photosynthesis models on scales from the leaf level to estimating the global carbon budget.

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A compendium of temperature responses of Rubisco kinetic traits: variability among and within photosynthetic groups and impacts on photosynthesis modeling

Abstract: HighlightA synthesis of existing data reveals differences in the temperature responses of Rubisco kinetics among higher plants, with important consequences for photosynthesis modeling.

Cited by 83 publications

References 119 publications

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

Acclimation of leaf respiration consistent with optimal photosynthetic capacity

The sensitivity of photosynthesis to O₂ and CO₂ concentration identifies strong Rubisco control above the thermal optimum

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A compendium of temperature responses of Rubisco kinetic traits: variability among and within photosynthetic groups and impacts on photosynthesis modeling

Abstract: HighlightA synthesis of existing data reveals differences in the temperature responses of Rubisco kinetics among higher plants, with important consequences for photosynthesis modeling.

Cited by 83 publications

References 119 publications

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

Acclimation of Biochemical and Diffusive Components of Photosynthesis in Rice, Wheat, and Maize to Heat and Water Deficit: Implications for Modeling Photosynthesis

Acclimation of leaf respiration consistent with optimal photosynthetic capacity

The sensitivity of photosynthesis to O2 and CO2 concentration identifies strong Rubisco control above the thermal optimum

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The sensitivity of photosynthesis to O₂ and CO₂ concentration identifies strong Rubisco control above the thermal optimum