Wall, Shellie and Vialet-Chabrand, Silvere and Davey, Phillip and Van Rie, Jeroen and Galle, Alexander and Cockram, James and Lawson, Tracy (2022) Stomata on the abaxial and adaxial leaf surface contribute differently to leaf gas exchange and photosynthesis in wheat. New Phytologist, 235 (5). pp. 1743-1756. DOI https://doi.org/10.1111/nph.18257
Wall, Shellie and Vialet-Chabrand, Silvere and Davey, Phillip and Van Rie, Jeroen and Galle, Alexander and Cockram, James and Lawson, Tracy (2022) Stomata on the abaxial and adaxial leaf surface contribute differently to leaf gas exchange and photosynthesis in wheat. New Phytologist, 235 (5). pp. 1743-1756. DOI https://doi.org/10.1111/nph.18257
Wall, Shellie and Vialet-Chabrand, Silvere and Davey, Phillip and Van Rie, Jeroen and Galle, Alexander and Cockram, James and Lawson, Tracy (2022) Stomata on the abaxial and adaxial leaf surface contribute differently to leaf gas exchange and photosynthesis in wheat. New Phytologist, 235 (5). pp. 1743-1756. DOI https://doi.org/10.1111/nph.18257
Abstract
Although stomata are typically found in greater numbers on the abaxial surface, wheat flag leaves have greater densities on the adaxial surface. We determine the impact of this less common stomatal patterning on gaseous fluxes using a novel chamber that simultaneously measures both leaf surfaces. Using a combination of differential illuminations and CO<sub>2</sub> concentrations at each leaf surface, we found mesophyll cells associated with the adaxial leaf surface have a higher photosynthetic capacity than the abaxial, supported by a greater stomatal conductance (driven by differences in stomatal density). Blocking vertical gas flux on the abaxial leaf surface demonstrated no compensation by adaxial stomata, suggesting each surface operates independently. Similar stomatal kinetics suggested some co-ordination between the two surfaces, but factors other than light intensity played a role in these responses. Higher photosynthetic capacity on the adaxial surface facilitates greater carbon assimilation, along with higher adaxial g<sub>s</sub> that would also support greater evaporative leaf cooling to maintain optimal leaf temperatures for photosynthesis. Furthermore, abaxial gas exchange contributed approximately 50% to leaf photosynthesis, and therefore represents an important contributor to overall leaf gas photosynthesis.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | bean (Phaseolus vulgaris L; ); bread wheat (Triticum aestivum L; net CO2 assimilation rate (A); split-chamber cuvette; stomatal conductance (g(s)); stomatal density |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 08 Aug 2022 12:52 |
Last Modified: | 07 Aug 2024 19:37 |
URI: | http://repository.essex.ac.uk/id/eprint/33234 |
Available files
Filename: New Phytologist - 2022 - Wall - Stomata on the abaxial and adaxial leaf surfaces contribute differently to leaf gas.pdf
Licence: Creative Commons: Attribution 3.0