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 epider...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2003-05, Vol.300 (5624), p.1427-1430
Hauptverfasser:	Ohashi, Yohei, Oka, Atsuhiro, Rodrigues-Pousada, Renato, Possenti, Marco, Ruberti, Ida, Morelli, Giorgio, Aoyama, Takashi
Format:	Artikel
Sprache:	eng
Schlagworte:	Arabidopsis - genetics Arabidopsis - growth & development Arabidopsis - metabolism Arabidopsis Proteins - chemistry Arabidopsis Proteins - genetics Arabidopsis Proteins - metabolism Biological and medical sciences Dexamethasone - pharmacology DNA Epidermal cells Epidermis Feedback (Response) Fundamental and applied biological sciences. Psychology Gene Expression Regulation, Plant Genes Genes, Plant Hair Hair cells Homeodomain Proteins - chemistry Homeodomain Proteins - genetics Homeodomain Proteins - metabolism Lipids Morphogenesis Observations Phosphates Phospholipase D - genetics Phospholipase D - metabolism Phospholipids - metabolism Plant cell development Plant cells Plant Epidermis - cytology Plant Epidermis - metabolism Plant growth. Development of the storage organs Plant physiology and development Plant roots Plant Roots - cytology Plant Roots - growth & development Plant Roots - metabolism Plants Plants, Genetically Modified Promoter Regions, Genetic Root hairs Signal Transduction Transgenic plants Vegetative apparatus, growth and morphogenesis. Senescence
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Zusammenfassung:	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 Dζ1 gene (AtPLDζ1) was identified as a direct target of GL2. Inducible expression of AtPLDζ1 promoted ectopic root-hair initiation. We conclude that GL2 exerts its regulatory effect on root-hair development through modulation of phospholipid signaling.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1083695