Modulation of phospholipid signaling by GLABRA2 in root-hair pattern formation.
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.
Ohashi
Yohei
Y
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Oka
Atsuhiro
A
Rodrigues-Pousada
Renato
R
Possenti
Marco
M
Ruberti
Ida
I
Morelli
Giorgio
G
Aoyama
Takashi
T
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
D029681:Arabidopsis Proteins; C089991:GL2 protein, Arabidopsis; D018398:Homeodomain Proteins; D010743:Phospholipids; D003907:Dexamethasone; D010739:Phospholipase D; C474583:phospholipase Dzeta1, Arabidopsis