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Grape ASR Regulates Glucose Transport, Metabolism and Signaling.
Jonathan Parrilla1, Anna Medici1,2, Cécile Gaillard1
1UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France.
The grape Abscisic acid, Stress, Ripening (ASR) protein, VvMSA, regulates glucose signaling by controlling the VvHT1 transporter gene. This protein mediates the complex interactions between glucose metabolism, transport, and signaling pathways in grapevine cells.
Area of Science:
- Plant Molecular Biology
- Plant Physiology
- Biochemistry
Background:
- Grapevine cells utilize glucose signaling for growth and development.
- Abscisic acid, Stress, Ripening (ASR) proteins are involved in plant stress responses.
- Hexose transporters play a crucial role in cellular glucose uptake.
Purpose of the Study:
- To elucidate the role of grape VvMSA protein in glucose signaling pathways.
- To investigate VvMSA's regulation of the hexose transporter VvHT1 gene promoter.
- To understand VvMSA's mediation in glucose metabolism, transport, and signaling.
Main Methods:
- Overexpression and repression of VvMSA in embryogenic and non-embryogenic grapevine cells.
- Utilized glucose analogs to differentiate glucose signal transduction pathways.
- Analyzed glucose transport and metabolism via glycolysis.
- Complemented Arabidopsis abi8 mutant with VvMSA.
Main Results:
- VvMSA acts as a transcriptional regulator of the VvHT1 gene in glycolysis-dependent glucose signaling.
- VvMSA mediates the interplay between glucose metabolism, transport, and signaling.
- Overexpression of VvMSA partially complemented Arabidopsis abi8 mutant, enhancing glucose uptake.
Conclusions:
- VvMSA is a key mediator in grapevine glucose signaling.
- VvMSA influences glucose transport and metabolism through VvHT1 regulation.
- VvMSA has conserved functions in glucose uptake across plant species.
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