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FT Modulates Genome-Wide DNA-Binding of the bZIP Transcription Factor FD
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Max Planck Institute for Developmental Biology,Department of Molecular Biology, Tübingen, Germany.ORCID-id: 0000-0002-9603-0882
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Max Planck Institute for Developmental Biology,Department of Molecular Biology, Tübingen, Germany; Beijing Advanced Innovation Centre for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, People’s Republic of China.ORCID-id: 0000-0002-0068-2967
2019 (engelsk)Inngår i: Plant Physiology, ISSN 0032-0889, E-ISSN 1532-2548, Vol. 180, nr 1, s. 367-380Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The transition to flowering is a crucial step in the plant life cycle that is controlled by multiple endogenous and environmental cues, including hormones, sugars, temperature, and photoperiod. Permissive photoperiod induces the expression of FLOWERING LOCUS T (FT) in the phloem companion cells of leaves. The FT protein then acts as a florigen that is transported to the shoot apical meristem, where it physically interacts with the Basic Leucine Zipper Domain transcription factor FD and 14-3-3 proteins. However, despite the importance of FD in promoting flowering, its direct transcriptional targets are largely unknown. Here, we combined chromatin immunoprecipitation sequencing and RNA sequencing to identify targets of FD at the genome scale and assessed the contribution of FT to DNA binding. We further investigated the ability of FD to form protein complexes with FT and TERMINAL FLOWER1 through interaction with 14-3-3 proteins. Importantly, we observed direct binding of FD to targets involved in several aspects of plant development. These target genes were previously unknown to be directly related to the regulation of flowering time. Our results confirm FD as a central regulator of floral transition at the shoot meristem and provide evidence for crosstalk between the regulation of flowering and other signaling pathways, such as pathways involved in hormone signaling.

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American Society of Plant Biologists , 2019. Vol. 180, nr 1, s. 367-380
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URN: urn:nbn:se:umu:diva-159400DOI: 10.1104/pp.18.01505ISI: 000466860800033PubMedID: 30770462OAI: oai:DiVA.org:umu-159400DiVA, id: diva2:1322053
Tilgjengelig fra: 2019-06-10 Laget: 2019-06-10 Sist oppdatert: 2019-06-10bibliografisk kontrollert

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