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

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dc.contributor.author Galmés Galmés, Jeroni
dc.contributor.author Hermida-Carrera, Carmen
dc.contributor.author Laanisto, Lauri
dc.contributor.author Niinemets, Ülo
dc.date.accessioned 2018-11-05T13:36:58Z
dc.identifier.uri http://hdl.handle.net/11201/148451
dc.description.abstract [eng] The present study provides a synthesis of the in vitro and in vivo temperature responses of Rubisco Michaelis-Menten constants for CO2 (Kc) and O2 (Ko), specificity factor (Sc,o) and maximum carboxylase turnover rate ( kcat c ) for 49 species from all the main photosynthetic kingdoms of life. Novel correction routines were developed for in vitro data to remove the effects of study-to-study differences in Rubisco assays. The compilation revealed differences in the energy of activation (ΔHa) of Rubisco kinetics between higher plants and other photosynthetic groups, although photosynthetic bacteria and algae were under-represented and very few species have been investigated so far. Within plants, the variation in Rubisco temperature responses was related to species' climate and photosynthetic mechanism, with differences in ΔHa for kcat c among C3 plants from cool and warm environments, and in ΔHa for kcat c and Kc among C3 and C4 plants. A negative correlation was observed among ΔHa for Sc/o and species' growth temperature for all data pooled, supporting the convergent adjustment of the temperature sensitivity of Rubisco kinetics to species' thermal history. Simulations of the influence of varying temperature dependences of Rubisco kinetics on Rubisco-limited photosynthesis suggested improved photosynthetic performance of C3 plants from cool habitats at lower temperatures, and C3 plants from warm habitats at higher temperatures, especially at higher CO2 concentration. Thus, variation in Rubisco kinetics for different groups of photosynthetic organisms might need consideration to improve prediction of photosynthesis in future climates. Comparisons between in vitro and in vivo data revealed common trends, but also highlighted a large variability among both types of Rubisco kinetics currently used to simulate photosynthesis, emphasizing the need for more experimental
dc.format application/pdf
dc.relation.isformatof Versió postprint del document publicat a:
dc.relation.ispartof Journal of Experimental Botany, 2016
dc.rights (c) Galmés Galmés, Jeroni et al., 2016
dc.subject.classification 57 - Biologia
dc.subject.other 57 - Biological sciences in general
dc.title A compendium of temperature responses of Rubisco kinetic traits: variability among and within photosynthetic groups and impact on photosynthesis modelling
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion
dc.date.updated 2018-11-05T13:36:58Z
dc.date.embargoEndDate info:eu-repo/date/embargoEnd/2075-01-01
dc.embargo 2075-01-01
dc.rights.accessRights info:eu-repo/semantics/embargoedAccess

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