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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

. 2020 ; 21 (8) : e49719. [pub] 20200706

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc21020266

Grantová podpora
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

E-zdroje Online Plný text

NLK Free Medical Journals od 2000 do Před 1 rokem
PubMed Central od 2000
Europe PubMed Central od 2000 do Před 1 rokem
Open Access Digital Library od 2000-07-01
Medline Complete (EBSCOhost) od 2000-07-01 do Před 1 rokem
Wiley Free Content od 2000 do Před 1 rokem

Odkazy

PubMed 32627357
DOI 10.15252/embr.201949719
Knihovny.cz E-zdroje

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.

Citace poskytuje Crossref.org

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