Three Medicago MtFUL genes have distinct and overlapping expression patterns during vegetative and reproductive development and 35S:MtFULb accelerates flowering and causes a terminal flower phenotype in Arabidopsis

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dc.contributor.author Vista, Mauren en
dc.contributor.author Zhang, Lulu en
dc.contributor.author Che, C en
dc.contributor.author Putterill, Joanna en
dc.date.accessioned 2016-08-12T05:43:14Z en
dc.date.issued 2015 en
dc.identifier.citation Frontiers in Genetics 6 Article number 50 2015 en
dc.identifier.issn 1664-8021 en
dc.identifier.uri http://hdl.handle.net/2292/29969 en
dc.description.abstract The timing of the transition to flowering is carefully controlled by plants in order to optimize sexual reproduction and the ensuing production of seeds, grains, and fruits. The genetic networks that regulate floral induction are best characterized in the temperate eudicot Arabidopsis in which the florigen gene FT plays a major role in promoting the transition to flowering. Legumes are an important plant group, but less is known about the regulation of their flowering time. In the model legume Medicago truncatula (Medicago), a temperate annual plant like Arabidopsis, flowering is induced by prolonged cold (vernalization) followed by long day lengths (LD). Recent molecular-genetic experiments have revealed that a FT-like gene, MtFTa1, is a central regulator of flowering time in Medicago. Here, we characterize the three Medicago FRUITFULL (FUL) MADS transcription factors, MtFULa, MtFULb, and MtFULc using phylogenetic analyses, gene expression profiling through developmental time courses, and functional analyses in transgenic plants. MtFULa and MtFULb have similarity in sequence and expression profiles under inductive environmental conditions during both vegetative and reproductive development while MtFULc is only up regulated in the apex after flowering in LD conditions. Sustained up regulation of MtFULs requires functional MtFTa1 but their transcript levels are not affected during cold treatment. Overexpression of MtFULa and MtFULb promotes flowering in transgenic Arabidopsis plants with an additional terminal flower phenotype on some 35S:MtFULb plants. An increase in transcript levels of the MtFULs was also observed in Medicago plants overexpressing MtFTa1. Our results suggest that the MtFULs are targets of MtFTa1. Overall, this work highlights the conserved functions of FUL-like genes in promoting flowering and other roles in plant development and thus contributes to our understanding of the genetic control of the flowering process in Medicago. en
dc.format.medium Electronic-eCollection en
dc.language eng en
dc.publisher Frontiers Media en
dc.relation.ispartofseries Frontiers in Genetics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1664-8021/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.title Three Medicago MtFUL genes have distinct and overlapping expression patterns during vegetative and reproductive development and 35S:MtFULb accelerates flowering and causes a terminal flower phenotype in Arabidopsis en
dc.type Journal Article en
dc.identifier.doi 10.3389/fgene.2015.00050 en
pubs.volume 6 en
dc.description.version VoR - Version of Record en
dc.description.version VoR - Version of Record en
dc.identifier.pmid 25745430 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 478087 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
dc.identifier.eissn 1664-8021 en
pubs.number 50 en
pubs.record-created-at-source-date 2016-08-12 en
pubs.dimensions-id 25745430 en


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