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- W2892356021 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-Box gene 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." @default.
- W2892356021 created "2018-09-27" @default.
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- W2892356021 date "2018-10-19" @default.
- W2892356021 modified "2023-10-13" @default.
- W2892356021 title "Tomato floral induction and flower development are orchestrated by the interplay between gibberellin and two unrelated micro<scp>RNA</scp>‐controlled modules" @default.
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- W2892356021 doi "https://doi.org/10.1111/nph.15492" @default.
- W2892356021 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30238569" @default.
- W2892356021 hasPublicationYear "2018" @default.
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