Journal
MOLECULAR PLANT
Volume 5, Issue 6, Pages 1346-1358Publisher
CELL PRESS
DOI: 10.1093/mp/sss079
Keywords
sugar transport; sucrose transporter; SUT; sugar partitioning; Medicago truncatula; Glomus intraradices
Categories
Funding
- Conseil Regional de Bourgogne [FABER 2008_9201AAO036S00220, PARI 20100112095254682-1]
- Agence National de la Recherche (project TRANSMUT) [ANR-10-BLAN-1604-01]
- Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-1604] Funding Source: Agence Nationale de la Recherche (ANR)
Ask authors/readers for more resources
We identified de novo sucrose transporter (SUT) genes involved in long-distance transport of sucrose from photosynthetic source leaves towards sink organs in the model leguminous species Medicago truncatula. The identification and functional analysis of sugar transporters provide key information on mechanisms that underlie carbon partitioning in plant-microorganism interactions. In that way, full-length sequences of the M. truncatula SUT (MtSUT) family were retrieved and biochemical characterization of MtSUT members was performed by heterologous expression in yeast. The MtSUT family now comprises six genes which distribute among Dicotyledonous clades. MtSUT1-1 and MtSUT4-1 are key members in regard to their expression profiles in source leaves and sink roots and were characterized as functional H+/sucrose transporters. Physiological and molecular responses to phosphorus supply and inoculation by the arbuscular mycorrhizal fungus (AMF) Glomus intra radices was studied by gene expression and sugar quantification analyses. Sucrose represents the main sugar transport form in M. truncatula and the expression profiles of MtSUT1-1, MtSUT2, and MtSUT4-1 highlight a fine-tuning regulation for beneficial sugar fluxes towards the fungal symbiont. Taken together, these results suggest distinct functions for proteins from the SUT1, SUT2, and SUT4 clades in plant and in biotrophic interactions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available