title: Abscissic acid specific expression of RAB18 involves activation of anion channels in Arabidopsis thaliana suspension cells.
abstract: The abscissic acid (ABA) transduction cascade following the plasmalemma perception was analyzed in intact Arabidopsis thaliana suspension cells. In response to impermeant ABA, anion currents were activated and K(+) inward rectifying currents were inhibited. Anion current activation was required for the ABA specific expression of RAB18. By contrast, specific inhibition of K(+) channels by tetraethylammonium or Ba(2+) did not affect RAB18 expression. Thus, outer plasmalemma ABA perception triggered two separated signaling pathways.
authors.affiliation: Physiologie Cellulaire et Moléculaire des Plantes, UMR CNRS 7632, Université Pierre et Marie Curie (Paris VI), 4 place Jussieu, 75252 Paris, Cedex 05, France.
authors.forename: T
authors.initials: T
authors.lastname: Ghelis
authors.forename: O
authors.initials: O
authors.lastname: Dellis
authors.forename: E
authors.initials: E
authors.lastname: Jeannette
authors.forename: F
authors.initials: F
authors.lastname: Bardat
authors.forename: D
authors.initials: D
authors.lastname: Cornel
authors.forename: E
authors.initials: E
authors.lastname: Miginiac
authors.forename: J P
authors.initials: JP
authors.lastname: Rona
authors.forename: B
authors.initials: B
authors.lastname: Sotta
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D000838:Anions; D017360:Arabidopsis / Q000502:physiology*; D029681:Arabidopsis Proteins; D017609:Barium Compounds / Q000494:pharmacology; D002712:Chlorides / Q000494:pharmacology; D004553:Electric Conductivity; D015870:Gene Expression / Q000187:drug effects*; D007473:Ion Channels / Q000037:antagonists & inhibitors / Q000502:physiology*; D018408:Patch-Clamp Techniques; D010940:Plant Proteins / Q000235:genetics*; D026902:Potassium Channel Blockers; D015221:Potassium Channels / Q000502:physiology; D015398:Signal Transduction; D019789:Tetraethylammonium / Q000494:pharmacology; D019287:Zinc Sulfate / Q000494:pharmacology; D020691:rab GTP-Binding Proteins
chemical_list: D000838:Anions; D029681:Arabidopsis Proteins; D017609:Barium Compounds; D002712:Chlorides; D007473:Ion Channels; D010940:Plant Proteins; D026902:Potassium Channel Blockers; D015221:Potassium Channels; C078703:rab18 protein, Arabidopsis; C024986:barium chloride; D019789:Tetraethylammonium; D000040:Abscisic Acid; D019287:Zinc Sulfate; D020691:rab GTP-Binding Proteins