TRIPTYCHON and CAPRICE mediate lateral inhibition during trichome and root hair patterning in Arabidopsis
Swen Schellmann,Swen Schellmann,Arp Schnittger,Arp Schnittger,Victor Kirik,Victor Kirik,Takuji Wada,Kiyotaka Okada,Anke Beermann,J. Thumfahrt,Gerd Jürgens,Martin Hülskamp +11 more
TLDR
The same lateral inhibition mechanism seems to be involved in both de novo patterning and position‐dependent cell determination in the root epidermis, proposing a model explaining trichome and root hair patterning by a common mechanism.Abstract:
Trichome patterning in Arabidopsis is a model for the generation of a spacing pattern from initially equivalent cells. We show that the TRIPTYCHON gene that functions in lateral inhibition encodes a single-repeat MYB-related transcription factor that lacks a recognizable activation domain. It has high sequence similarity to the root hair patterning gene CAPRICE. Both genes are expressed in trichomes and act together during lateral inhibition. We further show that TRIPTYCHON and CAPRICE act redundantly in the position-dependent cell fate determination in the root epidermis. Thus, the same lateral inhibition mechanism seems to be involved in both de novo patterning and position-dependent cell determination. We propose a model explaining trichome and root hair patterning by a common mechanism.read more
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GL3 Encodes a bHLH Protein That Regulates Trichome Development in Arabidopsis Through Interaction With GL1 and TTG1
TL;DR: It is demonstrated that the Arabidopsis trichome development locus GLABRA3 (GL3) encodes an R homolog, suggesting a reiterated combinatorial model for the differential regulation of such diverse developmental pathways as trichomes, root hair spacing, and anthocyanin secondary metabolism.
Journal ArticleDOI
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