Vialet-Chabrand, Silvere and Lawson, Tracy (2019) Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment. Journal of Experimental Botany, 70 (10). pp. 2839-2855. DOI https://doi.org/10.1093/jxb/erz068
Vialet-Chabrand, Silvere and Lawson, Tracy (2019) Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment. Journal of Experimental Botany, 70 (10). pp. 2839-2855. DOI https://doi.org/10.1093/jxb/erz068
Vialet-Chabrand, Silvere and Lawson, Tracy (2019) Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment. Journal of Experimental Botany, 70 (10). pp. 2839-2855. DOI https://doi.org/10.1093/jxb/erz068
Abstract
In spite of the significant progress made in recent years, the use of thermography to derive biologically relevant traits remains a challenge under fluctuating conditions. The aim of this study was to rethink the current method to process thermograms and derive temporal responses of stomatal conductance (gsw) using dynamic energy balance equations. Time-series thermograms provided the basis for a spatial and temporal characterization of gsw responses in wheat (Triticum aestivum). A leaf replica with a known conductance was used to validate the approach and to test the ability of our model to be used with any material and under any environmental conditions. The results highlighted the importance of the co-ordinated stomatal responses that run parallel to the leaf blade despite their patchy distribution. The diversity and asymmetry of the temporal response of gsw observed after a step increase and step decrease in light intensity can be interpreted as a strategy to maximize photosynthesis per unit of water loss and avoid heat stress in response to light flecks in a natural environment. This study removes a major bottleneck for plant phenotyping platforms and will pave the way to further developments in our understanding of stomatal behaviour.
Item Type: | Article |
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Uncontrolled Keywords: | Boundary layer, energy balance, patchy stomata, phenotyping, stomatal conductance, thermal imaging, transpiration |
Subjects: | Q Science > QK Botany |
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: | 06 Jun 2019 15:51 |
Last Modified: | 07 Aug 2024 19:20 |
URI: | http://repository.essex.ac.uk/id/eprint/24768 |
Available files
Filename: erz068.pdf
Licence: Creative Commons: Attribution 3.0