Sugars en route to the roots. Transport, metabolism and storage within plant roots and towards microorganisms of the rhizosphere
2019
Hennion, Nils | Durand, Mickaël | Vriet, Cécile | Doidy, Joan | Maurousset, Laurence | Lemoine, Rémi | Écologie et biologie des interactions [UMR 7267] (EBI [Poitiers]) ; Université de Poitiers = University of Poitiers (UP)-Centre National de la Recherche Scientifique (CNRS) | Sucres & Échanges Végétaux-Environnement [Équipe du laboratoire EBI Poitiers] (SEVE) ; Écologie et biologie des interactions [UMR 7267] (EBI [Poitiers]) ; Université de Poitiers = University of Poitiers (UP)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers = University of Poitiers (UP)-Centre National de la Recherche Scientifique (CNRS) | Institut Jean-Pierre Bourgin (IJPB) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech | University of Poitiers; Centre National de la Recherche Scientifique (CNRS); French Ministry for Research and Higher Education; 2015-2020 State-Region Planning Contracts (CPER), European Regional Development Fund (FEDER)
International audience
Show more [+] Less [-]English. In plants, the root is a typical sink organ that relies exclusively on the import of sugar from the aerial parts. Sucrose is delivered by the phloem to the most distant root tips and, en route to the tip, is used by the different root tissues for metabolism and storage. Besides, a certain portion of this carbon is exuded in the rhizosphere, supplied to beneficial microorganisms and diverted by parasitic microbes. The transport of sugars toward these numerous sinks either occurs symplastically through cell connections (plasmodesmata) or is apoplastically mediated through membrane transporters (MST, mononsaccharide tranporters, SUT/SUC, H+/sucrose transporters and SWEET, Sugar will eventually be exported transporters) that control monosaccharide and sucrose fluxes. Here, we review recent progresses on carbon partitioning within and outside roots, discussing membrane transporters involved in plant responses to biotic and abiotic factors.
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