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Modulation of phospholipid signaling by GLABRA2 in root-hair pattern formation

Science, ISSN: 0036-8075, Vol: 300, Issue: 5624, Page: 1427-1430
2003
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Article Description

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.

Bibliographic Details

Ohashi, Yohei; Oka, Atsuhiro; Rodrigues-Pousada, Renato; Possenti, Marco; Ruberti, Ida; Morelli, Giorgio; Aoyama, Takashi

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