Does the response of Rubisco and photosynthesis to elevated [CO2] change with unfavourable environmental conditions?

Date

2024-09-12

Authors

Galmes, J.
Sharwood, R. E.
Erice, G.
Ainsworth, E. A.
Tissue, D. T.
Sanz-Sáez, A.

Director

Publisher

Oxford University Press
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

Impacto
No disponible en Scopus

Abstract

Climate change due to anthropogenic CO2 emissions affects plant performance globally. To improve crop resilience, we need to understand the effects of elevated CO2 concentration (e[CO2]) on CO2 assimilation and Rubisco biochemistry. However, the interactive effects of e[CO2] and abiotic stress are especially unclear. This study examined the CO2 effect on photosynthetic capacity under different water availability and temperature conditions in 42 different crop species, varying in functional group, photosynthetic pathway, and phenological stage. We analysed close to 3000 data points extracted from 120 published papers. For C-3 species, e[CO2] increased net photosynthesis and intercellular [CO2], while reducing stomatal conductance and transpiration. Maximum carboxylation rate and Rubisco in vitro extractable maximal activity and content also decreased with e[CO2] in C-3 species, while C-4 crops are less responsive to e[CO2]. The interaction with drought and/or heat stress did not significantly alter these photosynthetic responses, indicating that the photosynthetic capacity of stressed plants responded to e[CO2]. Moreover, e[CO2] had a strong effect on the photosynthetic capacity of grasses mainly in the final stages of development. This study provides insight into the intricate interactions within the plant photosynthetic apparatus under the influence of climate change, enhancing the understanding of mechanisms governing plant responses to environmental parameters.

Description

Keywords

Drought, Elevated CO2, Heat stress, Phenology, Photosynthesis, Plant functional groups, Rubisco

Department

Ciencias / Zientziak / Agronomía, Biotecnología y Alimentación / Agronomia, Bioteknologia eta Elikadura

Faculty/School

Degree

Doctorate program

item.page.cita

Ancín, M., Gámez, A. L., Jauregui, I., Galmes, J., Sharwood, R. E., Erice, G., Ainsworth, E. A., Tissue, D. T., Sanz-Sáez, A., Aranjuelo, I. (2024) Does the response of Rubisco and photosynthesis to elevated [CO2] change with unfavourable environmental conditions?. Journal of Experimental Botany, 75(22), 7351-7364. https://doi.org/10.1093/jxb/erae379.

item.page.rights

© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence, which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited.

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