Universität zu Köln

Pallakies, Helge and Simon, Ruediger (2014). The CLE40 and CRN/CLV2 Signaling Pathways Antagonistically Control Root Meristem Growth in Arabidopsis. Mol. Plant., 7 (11). S. 1619 - 1637. CAMBRIDGE: CELL PRESS. ISSN 1752-9867

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Abstract

Peptide-receptor signaling is a prevalent mechanism in the regulation of stem cell differentiation in plant meristems. In this study, we elucidate the roles of the CRN/CLV2 receptor proteins and the CLE40 signaling peptide in the primary root meristem via large-scale transcriptome sequencing and phenotypic analyses, showing that both act in antagonistic pathways on proximal root meristem differentiation.Differentiation processes in the primary root meristem are controlled by several signaling pathways that are regulated by phytohormones or by secreted peptides. Long-term maintenance of an active root meristem requires that the generation of new stem cells and the loss of these from the meristem due to differentiation are precisely coordinated. Via phenotypic and large-scale transcriptome analyses of mutants, we show that the signaling peptide CLE40 and the receptor proteins CLV2 and CRN act in two genetically separable pathways that antagonistically regulate cell differentiation in the proximal root meristem. CLE40 inhibits cell differentiation throughout the primary root meristem by controlling genes with roles in abscisic acid, auxin, and cytokinin signaling. CRN and CLV2 jointly control target genes that promote cell differentiation specifically in the transition zone of the proximal root meristem. While CRN and CLV2 are not acting in the CLE40 signaling pathway under normal growth conditions, both proteins are required when the levels of CLE40 or related CLE peptides increase. We show here that two antagonistically acting pathways controlling root meristem differentiation can be activated by the same peptide in a dosage-dependent manner.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pallakies, Helge UNSPECIFIED UNSPECIFIED UNSPECIFIED Simon, Ruediger UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-424020
DOI:	10.1093/mp/ssu094
Journal or Publication Title:	Mol. Plant.
Volume:	7
Number:	11
Page Range:	S. 1619 - 1637
Date:	2014
Publisher:	CELL PRESS
Place of Publication:	CAMBRIDGE
ISSN:	1752-9867
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RECEPTOR-LIKE KINASE; LATERAL ROOT; GENE-EXPRESSION; AUXIN-RESPONSE; ABSCISIC-ACID; TRANSCRIPTION FACTOR; CELL FATE; PROTEIN; CLV3; PEPTIDES Multiple languages Biochemistry & Molecular Biology; Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42402