A SOC1-like gene MtSOC1a promotes flowering and primary stem elongation in Medicago.

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dc.contributor.author Vista, Mauren en
dc.contributor.author Zhang, Lulu en
dc.contributor.author Che, Chong en
dc.contributor.author Li, Guifen en
dc.contributor.author Tang, Yuhong en
dc.contributor.author Wen, Jiangqi en
dc.contributor.author Mysore, Kirankumar S en
dc.contributor.author Putterill, Joanna en
dc.date.accessioned 2019-03-13T00:20:32Z en
dc.date.issued 2018-09 en
dc.identifier.citation Journal of experimental botany 69(20):4867-4880 Sep 2018 en
dc.identifier.issn 0022-0957 en
dc.identifier.uri http://hdl.handle.net/2292/45944 en
dc.description.abstract Medicago flowering, like that of Arabidopsis, is promoted by vernalization and long days, but alternative mechanisms are predicted because Medicago lacks the key regulators CO and FLC. Three Medicago SOC1-like genes, including MtSOC1a, were previously implicated in flowering control, but no legume soc1 mutants with altered flowering were reported. Here, reverse transciption-quantitative PCR (RT-qPCR) indicated that the timing and magnitude of MtSOC1a expression was regulated by the flowering promoter FTa1, while in situ hybridization indicated that MtSOC1a expression increased in the shoot apical meristem during the floral transition. A Mtsoc1a mutant showed delayed flowering and short primary stems. Overexpression of MtSOC1a partially rescued the flowering of Mtsoc1a, but caused a dramatic increase in primary stem height, well before the transition to flowering. Internode cell length correlated with stem height, indicating that MtSOC1a promotes cell elongation in the primary stem. However, application of gibberellin (GA3) caused stem elongation in both the wild type and Mtsoc1a, indicating that the mutant was not defective in gibberellin responsiveness. These results indicate that MtSOC1a may function as a floral integrator gene and promotes primary stem elongation. Overall, this study suggests that apart from some conservation with the Arabidopsis flowering network, MtSOC1a has a novel role in regulating aspects of shoot architecture. en
dc.format.medium Print en
dc.language eng en
dc.relation.ispartofseries Journal of experimental botany 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. 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.subject Arabidopsis en
dc.subject Medicago en
dc.subject Flowers en
dc.subject Plant Stems en
dc.subject MADS Domain Proteins en
dc.subject Plant Proteins en
dc.subject Sequence Alignment en
dc.subject Phylogeny en
dc.subject Gene Expression Regulation, Developmental en
dc.subject Amino Acid Sequence en
dc.title A SOC1-like gene MtSOC1a promotes flowering and primary stem elongation in Medicago. en
dc.type Journal Article en
dc.identifier.doi 10.1093/jxb/ery284 en
pubs.issue 20 en
pubs.begin-page 4867 en
pubs.volume 69 en
dc.rights.holder Copyright: The authors en
pubs.end-page 4880 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Research Support, Non-U.S. Gov't en
pubs.subtype research-article en
pubs.subtype Journal Article en
pubs.elements-id 755009 en
pubs.org-id Science en
pubs.org-id Biological Sciences en
dc.identifier.eissn 1460-2431 en
pubs.record-created-at-source-date 2018-10-09 en
pubs.dimensions-id 30295903 en

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