Profiling of sugar transporter genes in grapevine coping with water deficit |
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Authors: | Anna Medici Maryse Laloi Rossitza Atanassova |
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Affiliation: | Université de Poitiers, UMR CNRS 7267 Écologie & Biologie des Interactions, Équipe Sucres & Echanges Végétaux/Environnement – SEVE, TSA 51106, 86073 Poitiers Cedex 9, France |
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Abstract: | The profiling of grapevine (Vitis vinifera L.) genes under water deficit was specifically targeted to sugar transporters. Leaf water status was characterized by physiological parameters and soluble sugars content. The expression analysis provided evidence that VvHT1 hexose transporter gene was strongly down-regulated by the increased sugar content under mild water-deficit. The genes of monosaccharide transporter VvHT5, sucrose carrier VvSUC11, vacuolar invertase VvGIN2 and grape ASR (ABA, stress, ripening) were up-regulated under severe water stress. Their regulation in a drought-ABA signalling network and possible roles in complex interdependence between sugar subcellular partitioning and cell influx/efflux under Grapevine acclimation to dehydration are discussed. |
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Keywords: | Sugar transporters Abscisic acid, stress and ripening proteins Vacuolar invertase Gene expression regulation Water deficit Grapevine |
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