Universität zu Köln

Zhang, Cui ORCID: 0000-0002-6119-5572, Wang, Jin, Wenkel, Stephan ORCID: 0000-0001-5764-9423, Chandler, John W., Werr, Wolfgang and Jiao, Yuling ORCID: 0000-0002-1189-1676 (2018). Spatiotemporal control of axillary meristem formation by interacting transcriptional regulators. Development, 145 (24). CAMBRIDGE: COMPANY BIOLOGISTS LTD. ISSN 1477-9129

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Abstract

Branching is a common feature of plant development. In seed plants, axillary meristems (AMs) initiate in leaf axils to enable lateral shoot branching. AM initiation requires a high level of expression of the meristem marker SHOOT MERISTEMLESS (STM) in the leaf axil. Here, we show that modules of interacting transcriptional regulators control STM expression and AM initiation. Two redundant AP2-type transcription factors, DORNROSCHEN (DRN) and DORNROSCHEN-LIKE (DRNL), control AM initiation by regulating STM expression. DRN and DRNL directly upregulate STM expression in leaf axil meristematic cells, as does another transcription factor, REVOLUTA (REV). The activation of STM expression by DRN/DRNL depends on REV, and vice versa. DRN/DRNL and REV have overlapping expression patterns and protein interactions in the leaf axil, which are required for the upregulation of STM expression. Furthermore, LITTLE ZIPPER3, another REV-interacting protein, is expressed in the leaf axil and interferes with the DRN/DRNL-REV interaction to negatively modulate STM expression. Our results support a model in which interacting transcriptional regulators fine-tune the expression of STM to precisely regulate AM initiation. Thus, shoot branching recruits the same conserved protein complexes used in embryogenesis and leaf polarity patterning.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Cui UNSPECIFIED orcid.org/0000-0002-6119-5572 UNSPECIFIED Wang, Jin UNSPECIFIED UNSPECIFIED UNSPECIFIED Wenkel, Stephan UNSPECIFIED orcid.org/0000-0001-5764-9423 UNSPECIFIED Chandler, John W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Werr, Wolfgang UNSPECIFIED UNSPECIFIED UNSPECIFIED Jiao, Yuling UNSPECIFIED orcid.org/0000-0002-1189-1676 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-161974
DOI:	10.1242/dev.158352
Journal or Publication Title:	Development
Volume:	145
Number:	24
Date:	2018
Publisher:	COMPANY BIOLOGISTS LTD
Place of Publication:	CAMBRIDGE
ISSN:	1477-9129
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FLORAL MERISTEMS; DORNROSCHEN-LIKE; GENE-EXPRESSION; CELL DIVISIONS; ARABIDOPSIS; INITIATION; SHOOT; AUXIN; REVEALS; ZIPPER Multiple languages Developmental Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16197