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Glucose uptake to guard cells via STP transporters provides carbon sources for stomatal opening and plant growth
S. Flütsch, A. Nigro, F. Conci, J. Fajkus, M. Thalmann, M. Trtílek, K. Panzarová, D. Santelia
Language English Country Great Britain
Document type Journal Article, Research Support, Non-U.S. Gov't
Grant support
PITN-GA-2013-608422-IDP BRIDGES, 722338-PlantHUB
European Union's Horizon 2020 - International
University of Zürich - International
ETH Zürich - International
31003A_166539
Swiss National Science Foundation - Switzerland
310030_185241
Swiss National Science Foundation - Switzerland
NLK
Free Medical Journals
from 2000 to 1 year ago
PubMed Central
from 2000
Europe PubMed Central
from 2000 to 1 year ago
Open Access Digital Library
from 2000-07-01
Medline Complete (EBSCOhost)
from 2000-07-01 to 1 year ago
Wiley Free Content
from 2000 to 1 year ago
- MeSH
- Arabidopsis * genetics MeSH
- Glucose MeSH
- Arabidopsis Proteins * genetics MeSH
- Plant Stomata MeSH
- Light MeSH
- Carbon MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Guard cells on the leaf epidermis regulate stomatal opening for gas exchange between plants and the atmosphere, allowing a balance between photosynthesis and transpiration. Given that guard cells possess several characteristics of sink tissues, their metabolic activities should largely depend on mesophyll-derived sugars. Early biochemical studies revealed sugar uptake into guard cells. However, the transporters that are involved and their relative contribution to guard cell function are not yet known. Here, we identified the monosaccharide/proton symporters Sugar Transport Protein 1 and 4 (STP1 and STP4) as the major plasma membrane hexose sugar transporters in the guard cells of Arabidopsis thaliana. We show that their combined action is required for glucose import to guard cells, providing carbon sources for starch accumulation and light-induced stomatal opening that are essential for plant growth. These findings highlight mesophyll-derived glucose as an important metabolite connecting stomatal movements with photosynthesis.
Department of Plant and Microbial Biology University of Zürich Zürich Switzerland
Institute of Integrative Biology ETH Zürich Zürich Switzerland
References provided by Crossref.org
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