title: Modulation of phospholipid signaling by GLABRA2 in root-hair pattern formation.
abstract: The root-hair pattern of Arabidopsis is determined through a regulatory circuit composed of transcription factor genes. The homeobox gene GLABRA2 (GL2) has been considered a key component, acting farthest downstream in this regulation. GL2 modified to include a transactivating function caused epidermal cells to develop ectopic root hairs or root hair-like structures. With this system, the phospholipase Dzeta1 gene (AtPLDzeta1) was identified as a direct target of GL2. Inducible expression of AtPLDzeta1 promoted ectopic root-hair initiation. We conclude that GL2 exerts its regulatory effect on root-hair development through modulation of phospholipid signaling.
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Ohashi
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Oka
authors.forename: Renato
authors.initials: R
authors.lastname: Rodrigues-Pousada
authors.forename: Marco
authors.initials: M
authors.lastname: Possenti
authors.forename: Ida
authors.initials: I
authors.lastname: Ruberti
authors.forename: Giorgio
authors.initials: G
authors.lastname: Morelli
authors.forename: Takashi
authors.initials: T
authors.lastname: Aoyama
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D003907:Dexamethasone / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018398:Homeodomain Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D009024:Morphogenesis; D010739:Phospholipase D / Q000235:genetics* / Q000378:metabolism; D010743:Phospholipids / Q000378:metabolism*; D019441:Plant Epidermis / Q000166:cytology / Q000378:metabolism; D018517:Plant Roots / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism; D030821:Plants, Genetically Modified; D011401:Promoter Regions, Genetic; D015398:Signal Transduction
chemical_list: D029681:Arabidopsis Proteins; C089991:GL2 protein, Arabidopsis; D018398:Homeodomain Proteins; D010743:Phospholipids; D003907:Dexamethasone; D010739:Phospholipase D; C474583:phospholipase Dzeta1, Arabidopsis