title: Does PtaRHE1, a poplar RING-H2 protein, play a role in water conduction through ABA signaling?
abstract: RING (REALLY INTERESTING NEW GENE) proteins with E3 ligase activity are largely represented in plants. They have been shown to play important roles in the regulation of many biological processes by recognizing target proteins for ubiquitination. PtaRHE1, encoding a poplar RING-H2 domain-containing protein with E3 ligase activity has been previously shown to be expressed during the establishment of secondary vascular system in poplar. In the present report, we demonstrate that the expression of PtaRHE1 and the accumulation of its corresponding protein are modulated by the relative atmospheric and soil humidity and by abscisic acid. Overall, the integrated data are discussed within a working model highlighting a plausible function of PtaRHE1 in the signaling and/or in the regulation of water status in poplar.
authors.affiliation: Laboratoire de Biotechnologie Végétale; Université Libre de Bruxelles (ULB); Gosselies, Belgium.
authors.forename: Jihad
authors.initials: J
authors.lastname: Moussawi
authors.affiliation: Laboratoire de Biotechnologie Végétale; Université Libre de Bruxelles (ULB); Gosselies, Belgium.
authors.forename: Fabien
authors.initials: F
authors.lastname: Baldacci-Cresp
authors.affiliation: Laboratoire de Biotechnologie Végétale; Université Libre de Bruxelles (ULB); Gosselies, Belgium.
authors.forename: Mondher
authors.initials: M
authors.lastname: El Jaziri
authors.affiliation: Laboratoire de Biotechnologie Végétale; Université Libre de Bruxelles (ULB); Gosselies, Belgium.
authors.forename: Marie
authors.initials: M
authors.lastname: Baucher
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism; D058526:Plant Vascular Bundle / Q000254:growth & development; D032107:Populus / Q000254:growth & development / Q000378:metabolism*; D044767:Ubiquitin-Protein Ligases / Q000378:metabolism*; D014867:Water / Q000502:physiology
chemical_list: D010940:Plant Proteins; D014867:Water; D000040:Abscisic Acid; D044767:Ubiquitin-Protein Ligases
keywords: ABA; E3 ligase; PtaRHE1; RING-H2; poplar; vascular tissues; water conduction