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Bucsenez M, Rüping B, Behrens S, Twyman RM, Noll GA, Prüfer D. Multiple cis-regulatory elements are involved in the complex regulation of the sieve element-specific MtSEO-F1 promoter from Medicago truncatula. Plant Biol (Stuttg) 2012; 14:714-24. [PMID: 22404711 DOI: 10.1111/j.1438-8677.2011.00556.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The sieve element occlusion (SEO) gene family includes several members that are expressed specifically in immature sieve elements (SEs) in the developing phloem of dicotyledonous plants. To determine how this restricted expression profile is achieved, we analysed the SE-specific Medicago truncatula SEO-F1 promoter (PMtSEO-F1) by constructing deletion, substitution and hybrid constructs and testing them in transgenic tobacco plants using green fluorescent protein as a reporter. This revealed four promoter regions, each containing cis-regulatory elements that activate transcription in SEs. One of these segments also contained sufficient information to suppress PMtSEO-F1 transcription in the phloem companion cells (CCs). Subsequent in silico analysis revealed several candidate cis-regulatory elements that PMtSEO-F1 shares with other SEO promoters. These putative sieve element boxes (PSE boxes) are promising candidates for cis-regulatory elements controlling the SE-specific expression of PMtSEO-F1.
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Affiliation(s)
- M Bucsenez
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
| | - B Rüping
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
| | - S Behrens
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
| | - R M Twyman
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
| | - G A Noll
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
| | - D Prüfer
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany Max Planck Institute for Molecular Genetics, Computational Molecular Biology, Berlin, Germany Department of Biological Sciences, University of Warwick, Coventry, UK
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