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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180897.pdf - Accepted Version 1MB |
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 > School of Molecular Biosciences |
| 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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