Papanatsiou, M., Amtmann, A. and Blatt, M. R. (2017) Stomatal clustering in Begonia associates with the kinetics of leaf gaseous exchange and influences water use efficiency. Journal of Experimental Botany, 68(9), pp. 2309-2315. (doi: 10.1093/jxb/erx072) (PMID:28369641) (PMCID:PMC5447881)
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Abstract
Stomata are microscopic pores formed by specialized cells in the leaf epidermis and permit gaseous exchange between the interior of the leaf and the atmosphere. Stomata in most plants are separated by at least one epidermal pavement cell and, individually, overlay a single substomatal cavity within the leaf. This spacing is thought to enhance stomatal function. Yet, there are several genera naturally exhibiting stomata in clusters and therefore deviating from the one-cell spacing rule with multiple stomata overlaying a single substomatal cavity. We made use of two Begonia species to investigate whether clustering of stomata alters guard cell dynamics and gas exchange under different light and dark treatments. Begonia plebeja, which forms stomatal clusters, exhibited enhanced kinetics of stomatal conductance and CO2 assimilation upon light stimuli that in turn were translated into greater water use efficiency. Our findings emphasize the importance of spacing in stomatal clusters for gaseous exchange and plant performance under environmentally limited conditions.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Blatt, Professor Michael and Amtmann, Professor Anna and Papanatsiou, Dr Maria |
| Authors: | Papanatsiou, M., Amtmann, A., and Blatt, M. R. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Molecular Biosciences |
| Journal Name: | Journal of Experimental Botany |
| Publisher: | Oxford University Press |
| ISSN: | 0022-0957 |
| ISSN (Online): | 1460-2431 |
| Published Online: | 28 March 2017 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Journal of Experimental Botany 68(9): 2309-2315 |
| Publisher Policy: | Reproduced under a Creative Commons license |
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