Optogenetic manipulation of stomatal kinetics improves carbon assimilation, water use, and growth

Papanatsiou, M., Petersen, J., Henderson, L., Wang, Y., Christie, J.M. and Blatt, M.R. (2019) Optogenetic manipulation of stomatal kinetics improves carbon assimilation, water use, and growth. Science, 363(6434), pp. 1456-1459. (doi:10.1126/science.aaw0046) (PMID:30923223)

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Abstract

Stomata serve dual and often conflicting roles, facilitating carbon dioxide influx into the plant leaf for photosynthesis and restricting water efflux via transpiration. Strategies for reducing transpiration without incurring a cost for photosynthesis must circumvent this inherent coupling of carbon dioxide and water vapor diffusion. We expressed the synthetic, light-gated K+ channel BLINK1 in guard cells surrounding stomatal pores in Arabidopsis to enhance the solute fluxes that drive stomatal aperture. BLINK1 introduced a K+ conductance and accelerated both stomatal opening under light exposure and closing after irradiation. Integrated over the growth period, BLINK1 drove a 2.2-fold increase in biomass in fluctuating light without cost in water use by the plant. Thus, we demonstrate the potential of enhancing stomatal kinetics to improve water use efficiency without penalty in carbon fixation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Blatt, Professor Michael and Christie, Professor John and Papanatsiou, Dr Maria and Henderson, Ms Louise and Wang, Dr Yizhou and Petersen, Dr Jan
Authors: Papanatsiou, M., Petersen, J., Henderson, L., Wang, Y., Christie, J.M., and Blatt, M.R.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Science
Publisher:American Association for the Advancement of Science
ISSN:0036-8075
ISSN (Online):1095-9203
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Science 363(6434): 1456-1459
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
626121Stomatal-based systems analysis of water use efficiencyMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/L001276/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
656891Analysing GORK clustering for enhanced stomatal controlMichael BlattBiotechnology and Biological Sciences Research Council (BBSRC)BB/M001601/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
659801Photoreceptor Engineering to Modulate Plant GrowthJohn ChristieBiotechnology and Biological Sciences Research Council (BBSRC)BB/M002128/1RI MOLECULAR CELL & SYSTEMS BIOLOGY
3014130How do Phototropin Receptor Kinases Initiate Signalling from the PlasmaJohn ChristieBiotechnology and Biological Sciences Research Council (BBSRC)BB/R001499/1Institute of Molecular, Cell & Systems Biology