The impact of growth at elevated [CO2] on stomatal anatomy and behavior differs between wheat species and cultivars.
| Autor: | Wall S; School of Life Sciences, University of Essex, Colchester CO4 3SQ, UK., Cockram J; NIAB, 93 Lawrence Weaver Road, Cambridge CB3 0LE, UK., Vialet-Chabrand S; School of Life Sciences, University of Essex, Colchester CO4 3SQ, UK., Van Rie J; BASF Belgium Coordination Center CommV-Innovation Center Gent, Technologiepark-Zwijnaarde 101, 9052 Gent, Belgium., Gallé A; BASF Belgium Coordination Center CommV-Innovation Center Gent, Technologiepark-Zwijnaarde 101, 9052 Gent, Belgium., Lawson T; School of Life Sciences, University of Essex, Colchester CO4 3SQ, UK. |
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| Jazyk: | angličtina |
| Zdroj: | Journal of experimental botany [J Exp Bot] 2023 Apr 27; Vol. 74 (9), pp. 2860-2874. |
| DOI: | 10.1093/jxb/erad011 |
| Abstrakt: | The ability of plants to respond to changes in the environment is crucial to their survival and reproductive success. The impact of increasing the atmospheric CO2 concentration (a[CO2]), mediated by behavioral and developmental responses of stomata, on crop performance remains a concern under all climate change scenarios, with potential impacts on future food security. To identify possible beneficial traits that could be exploited for future breeding, phenotypic variation in morphological traits including stomatal size and density, as well as physiological responses and, critically, the effect of growth [CO2] on these traits, was assessed in six wheat relative accessions (including Aegilops tauschii, Triticum turgidum ssp. Dicoccoides, and T. turgidum ssp. dicoccon) and five elite bread wheat T. aestivum cultivars. Exploiting a range of different species and ploidy, we identified key differences in photosynthetic capacity between elite hexaploid wheat and wheat relatives. We also report differences in the speed of stomatal responses which were found to be faster in wheat relatives than in elite cultivars, a trait that could be useful for enhanced photosynthetic carbon gain and water use efficiency. Furthermore, these traits do not all appear to be influenced by elevated [CO2], and determining the underlying genetics will be critical for future breeding programmes. (© The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology.) |
| Databáze: | MEDLINE |
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