title: Plant flavonoids--biosynthesis, transport and involvement in stress responses.
abstract: This paper aims at analysing the synthesis of flavonoids, their import and export in plant cell compartments, as well as their involvement in the response to stress, with particular reference to grapevine (Vitis vinifera L.). A multidrug and toxic compound extrusion (MATE) as well as ABC transporters have been demonstrated in the tonoplast of grape berry, where they perform a flavonoid transport. The involvement of a glutathione S-transferase (GST) gene has also been inferred. Recently, a putative flavonoid carrier, similar to mammalian bilitranslocase (BTL), has been identified in both grape berry skin and pulp. In skin the pattern of BTL expression increases from véraison to harvest, while in the pulp its expression reaches the maximum at the early ripening stage. Moreover, the presence of BTL in vascular bundles suggests its participation in long distance transport of flavonoids. In addition, the presence of a vesicular trafficking in plants responsible for flavonoid transport is discussed. Finally, the involvement of flavonoids in the response to stress is described.
authors.affiliation: Department of Agricultural and Environmental Sciences, Unit of Plant Biology, University of Udine, Udine, Italy. elisa.petrussa@uniud.it
authors.forename: Elisa
authors.initials: E
authors.lastname: Petrussa
authors.forename: Enrico
authors.initials: E
authors.lastname: Braidot
authors.forename: Marco
authors.initials: M
authors.lastname: Zancani
authors.forename: Carlo
authors.initials: C
authors.lastname: Peresson
authors.forename: Alberto
authors.initials: A
authors.lastname: Bertolini
authors.forename: Sonia
authors.initials: S
authors.lastname: Patui
authors.forename: Angelo
authors.initials: A
authors.lastname: Vianello
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000378:metabolism; D001692:Biological Transport; D005419:Flavonoids / Q000096:biosynthesis / Q000737:chemistry / Q000378:metabolism*; D059828:Plant Cells / Q000378:metabolism; D010944:Plants / Q000378:metabolism*; D013312:Stress, Physiological; D027843:Vitis / Q000378:metabolism
chemical_list: D018528:ATP-Binding Cassette Transporters; D005419:Flavonoids