title: Chemical-regulated, site-specific DNA excision in transgenic plants.
abstract: We have developed a chemical-inducible, site-specific DNA excision system in transgenic Arabidopsis plants mediated by the Cre/loxP DNA recombination system. Expression of the Cre recombinase was tightly controlled by an estrogen receptor-based fusion transactivator XVE. Upon induction by beta-estradiol, sequences encoding the selectable marker, Cre, and XVE sandwiched by two loxP sites were excised from the Arabidopsis genome, leading to activation of the downstream GFP (green fluorescent protein) reporter gene. Genetic and molecular analyses indicated that the system is tightly controlled, showing high-efficiency inducible DNA excision in all 19 transgenic events tested with either single or multiple T-DNA insertions. The system provides a highly reliable method to generate marker-free transgenic plants after transformation through either organogenesis or somatic embryogenesis.
authors.affiliation: Laboratory of Plant Molecular Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.
authors.forename: J
authors.initials: J
authors.lastname: Zuo
authors.forename: Q W
authors.initials: QW
authors.lastname: Niu
authors.forename: S G
authors.initials: SG
authors.lastname: Møller
authors.forename: N H
authors.initials: NH
authors.lastname: Chua
mesh_terms: D017360:Arabidopsis / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D004958:Estradiol / Q000494:pharmacology; D005786:Gene Expression Regulation / Q000187:drug effects; D017930:Genes, Reporter; D005819:Genetic Markers; D049452:Green Fluorescent Proteins; D019426:Integrases / Q000235:genetics* / Q000378:metabolism; D008164:Luminescent Proteins / Q000032:analysis / Q000235:genetics; D016254:Mutagenesis, Insertional; D030821:Plants, Genetically Modified / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011960:Receptors, Estrogen / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism; D014764:Viral Proteins
chemical_list: D004269:DNA, Bacterial; D018744:DNA, Plant; D005819:Genetic Markers; D008164:Luminescent Proteins; D011960:Receptors, Estrogen; D011993:Recombinant Fusion Proteins; C036483:T-DNA; D015534:Trans-Activators; D014764:Viral Proteins; D049452:Green Fluorescent Proteins; D004958:Estradiol; C045073:Cre recombinase; D019426:Integrases