Universität zu Köln

Comelli, Petra, Glowa, Dorothea, Chandler, John W. and Werr, Wolfgang (2016). Founder-cell-specific transcription of the DORNROSCHEN-LIKE promoter and integration of the auxin response. J. Exp. Bot., 67 (1). S. 143 - 156. OXFORD: OXFORD UNIV PRESS. ISSN 1460-2431

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Abstract

Transcription of the DORNROSCHEN (DRNL) promoter marks lateral-organ founder cells throughout Arabidopsis development, from cotyledons to flowers or floral organs. In the inflorescence apex, DRNL::GFP depicts incipient floral phyllotaxy, and organs in the four floral whorls are differentially prepatterned: the sepals unidirectionally along an abaxial-adaxial axis, the four petals and two lateral stamens in two putative morphogenetic fields, and the medial stamens subsequently in a ring-shaped domain, before two groups of carpel founder cells are specified. The dynamic DRNL transcription pattern is controlled by three enhancer elements, which redundantly and synergistically control qualitative or quantitative aspects of expression, and differentially integrate the auxin response in Arabidopsis inflorescence and floral meristems. The high sequence conservation of all three enhancer elements among the Brassicaceae is striking, which suggests that densely packed cis-regulatory elements are conserved to recruit multiple transcription factors, including auxin response factors, into higher-order enhanceosome complexes. The spatial organization of the enhancers is also conserved, by a microsynteny that extends beyond the Brassicaceae, which relates to enhancer sharing, as the distal element En1 bidirectionally serves DRNL and the upstream At1g24600 gene; the genes are transcribed in opposite directions and possibly comprise a conserved functional chromatin domain.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Comelli, Petra UNSPECIFIED UNSPECIFIED UNSPECIFIED Glowa, Dorothea UNSPECIFIED UNSPECIFIED UNSPECIFIED Chandler, John W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Werr, Wolfgang UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-291886
DOI:	10.1093/jxb/erv442
Journal or Publication Title:	J. Exp. Bot.
Volume:	67
Number:	1
Page Range:	S. 143 - 156
Date:	2016
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1460-2431
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GENE-EXPRESSION; DORNRA-SCHEN; ARABIDOPSIS; EVOLUTION; MERISTEM; BRASSICACEAE; TRANSPORT; PATTERNS; GENOME; FLOWER Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/29188