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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tomato floral induction and flower development are orchestrated by the interplay between gibberellin and two unrelated microRNA-controlled modules

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Author(s):
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Silva, Geraldo F. F. [1] ; Silva, Eder M. [1] ; Correa, Joao P. O. [1] ; Vicente, Mateus H. [2] ; Jiang, Nan [3] ; Notini, Marcela M. [1] ; Junior, Airton C. [1] ; De Jesus, Frederico A. [2] ; Castilho, Pollyanna [1] ; Carrera, Esther [4] ; Lopez-Diaz, Isabel [4] ; Grotewold, Erich [3] ; Peres, Lazaro E. P. [2] ; Nogueira, Fabio T. S. [1]
Total Authors: 14
Affiliation:
[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz ESALQ, Lab Mol Genet Plant Dev, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz ESALQ, Lab Hormonal Control Plant Dev, BR-13418900 Piracicaba, SP - Brazil
[3] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 - USA
[4] Univ Politecn Valencia, CSIC, Inst Biol Mol & Celular Plantas, Ingeniero Fausto Elio S-N, E-46022 Valencia - Spain
Total Affiliations: 4
Document type: Journal article
Source: NEW PHYTOLOGIST; v. 221, n. 3, p. 1328-1344, FEB 2019.
Web of Science Citations: 8
Abstract

Age-regulated microRNA156 (miR156) and targets similarly control the competence to flower in diverse species. By contrast, the diterpene hormone gibberellin (GA) and the microRNA319-regulated TEOSINTE BRANCHED/CYCLOIDEA/PCF (TCP) transcription factors promote flowering in the facultative long-day Arabidopsis thaliana, but suppress it in the day-neutral tomato (Solanum lycopersicum). We combined genetic and molecular studies and described a new interplay between GA and two unrelated miRNA-associated pathways that modulates tomato transition to flowering. Tomato PROCERA/DELLA activity is required to promote flowering along with the miR156-targeted SQUAMOSA PROMOTER BINDING-LIKE (SPL/SBP) transcription factors by activating SINGLE FLOWER TRUSS (SFT) in the leaves and the MADS-Boxgene APETALA1(AP1)/MC at the shoot apex. Conversely, miR319-targeted LANCEOLATE represses floral transition by increasing GA concentrations and inactivating SFT in the leaves and AP1/MC at the shoot apex. Importantly, the combination of high GA concentrations/responses with the loss of SPL/SPB function impaired canonical meristem maturation and flower initiation in tomato. Our results reveal a cooperative regulation of tomato floral induction and flower development, integrating age cues (miR156 module) with GA responses and miR319-controlled pathways. Importantly, this study contributes to elucidate the mechanisms underlying the effects of GA in controlling flowering time in a day-neutral species. (AU)

FAPESP's process: 15/17892-7 - Functional study of the miR159- and miR319-regulated pathways during tomato flower and fruit development
Grantee:Fabio Tebaldi Silveira Nogueira
Support type: Regular Research Grants
FAPESP's process: 15/23826-7 - The interplay between GA (gibberellin) and age (miR156 node) pathways controlling tomato flowering
Grantee:Geraldo Felipe Ferreira e Silva
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/16949-0 - Plant architecture regulation of tomato by the pathway miR156-SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL)
Grantee:Geraldo Felipe Ferreira e Silva
Support type: Scholarships in Brazil - Doctorate