Universität zu Köln

Chandler, J. W. and Werr, W. (2020). A phylogenetically conserved APETALA2/ETHYLENE RESPONSE FACTOR, ERF12, regulates Arabidopsis floral development. Plant Mol.Biol., 102 (1-2). S. 39 - 55. DORDRECHT: SPRINGER. ISSN 1573-5028

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Abstract

Key message Arabidopsis ETHYLENE RESPONSE FACTOR12 (ERF12), the rice MULTIFLORET SPIKELET1 orthologue pleiotropically affects meristem identity, floral phyllotaxy and organ initiation and is conserved among angiosperms. Reproductive development necessitates the coordinated regulation of meristem identity and maturation and lateral organ initiation via positive and negative regulators and network integrators. We have identified ETHYLENE RESPONSE FACTOR12 (ERF12) as the Arabidopsis orthologue of MULTIFLORET SPIKELET1 (MFS1) in rice. Loss of ERF12 function pleiotropically affects reproductive development, including defective floral phyllotaxy and increased floral organ merosity, especially supernumerary sepals, at incomplete penetrance in the first-formed flowers. Wildtype floral organ number in early formed flowers is labile, demonstrating that floral meristem maturation involves the stabilisation of positional information for organogenesis, as well as appropriate identity. A subset of erf12 phenotypes partly defines a narrow developmental time window, suggesting that ERF12 functions heterochronically to fine-tune stochastic variation in wild type floral number and similar to MFS1, promotes meristem identity. ERF12 expression encircles incipient floral primordia in the inflorescence meristem periphery and is strong throughout the floral meristem and intersepal regions. ERF12 is a putative transcriptional repressor and genetically opposes the function of its relatives DORNRoSCHEN, DORNRoSCHEN-LIKE and PUCHI and converges with the APETALA2 pathway. Phylogenetic analysis suggests that ERF12 is conserved among all eudicots and appeared in angiosperm evolution concomitant with the generation of floral diversity.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Chandler, J. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Werr, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-124744
DOI:	10.1007/s11103-019-00936-5
Journal or Publication Title:	Plant Mol.Biol.
Volume:	102
Number:	1-2
Page Range:	S. 39 - 55
Date:	2020
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-5028
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FLOWER DEVELOPMENT; MERISTEM IDENTITY; DORNROSCHEN-LIKE; INFLORESCENCE ARCHITECTURE; SPIKELET MERISTEM; GENE-EXPRESSION; ORGAN IDENTITY; HOMEOTIC GENE; PHASE-CHANGE; AINTEGUMENTA Multiple languages Biochemistry & Molecular Biology; Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12474