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Sugars en route to the roots. Transport, metabolism and storage within plant roots and towards microorganisms of the rhizosphere.

Authors :
Hennion, Nils
Durand, Mickael
Vriet, Cécile
Doidy, Joan
Maurousset, Laurence
Lemoine, Rémi
Pourtau, Nathalie
Source :
Physiologia Plantarum. Jan2019, Vol. 165 Issue 1, p44-57. 14p. 3 Diagrams.
Publication Year :
2019

Abstract

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00319317
Volume :
165
Issue :
1
Database :
Academic Search Index
Journal :
Physiologia Plantarum
Publication Type :
Academic Journal
Accession number :
133627200
Full Text :
https://doi.org/10.1111/ppl.12751