Stomatal clustering in Begonia associates with the kinetics of leaf gaseous exchange and influences water use efficiency

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, Miss Maria
Authors: Papanatsiou, M., Amtmann, A., and Blatt, M. R.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
563751MAGIC - A Multi-tiered approach to generating increased carbon dioxide in the chloroplastMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/I024496/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
616991Directed control of secretory vesicle fusionMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/K015893/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
626121Stomatal-based systems analysis of water use efficiencyMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/L001276/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
563753MAGIC - A Multi-tiered approach to generating increased carbon dioxide in the chloroplastMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/M01133X/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
696911NEURICEMichael BlattEuropean Commission (EC)678168RI MOLECULAR CELL & SYSTEMS BIOLOGY