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  • 1
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    Regulation of the timing of transposable element excision during maize development (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-06-22
    Description: The ability of transposable elements (TEs) to insert into or excise out of a genetic locus can be regulated by genetic, environmental, and developmental factors. Tissue- or organ-specific activity of TEs is a frequent and well-characterized example of spatial, developmental regulation. Regulation of the timing of TE activity during ontogeny is less well understood. To analyze timing, TE-induced variegation was quantified in the aleurone of maize kernels, a tissue composed of only a single layer of cells, and sector sizes were assigned to specific cell divisions in aleurone development. Three TE families, Mu, Spm, and Ac/Ds, were studied at two genetic loci. It was found that the frequency of transposon excision changes drastically (up to 30-fold increase or equivalent decrease) during the proliferation of the aleurone. Moreover, these changes occur at the same cell divisions in all three TE families. These results suggest that the timing of TE excision during maize development can be controlled by the host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levy, A A -- Walbot, V -- GM 32422/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jun 22;248(4962):1534-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, CA 94305-5020.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2163107" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Anthocyanins/biosynthesis/genetics ; Cell Division ; DNA Transposable Elements/*genetics ; Mutation ; Zea mays/*genetics/growth & development
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Arabidopsis and Nicotiana anthocyanin production activated by maize regulators R and C1 (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-12-11
    Description: Anthocyanin pathway-specific transcriptional activators R and C1 from the monocot maize were expressed in two dicots, Arabidopsis thaliana and Nicotiana tabacum. Expression of R caused augmented anthocyanin pigmentation in both plant species and augmented trichome (hair) production in Arabidopsis. Alone, C1 had no effect. Hybrid transgenic Arabidopsis expressing both C1 and R produced anthocyanins in root, petal, and stamen tissues that normally never express anthrocyanins. When R was expressed in the transparent testa glabrous (without anthocyanins and trichomes) mutant of Arabidopsis, the deficiency was complemented and both anthocyanins and trichomes were restored.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lloyd, A M -- Walbot, V -- Davis, R W -- GM 32422/GM/NIGMS NIH HHS/ -- R37-H600198/PHS HHS/ -- New York, N.Y. -- Science. 1992 Dec 11;258(5089):1773-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Stanford University, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1465611" target="_blank"〉PubMed〈/a〉
    Keywords: Anthocyanins/*biosynthesis ; Arabidopsis/*genetics/*metabolism ; Base Sequence ; Genes, Plant ; Genetic Vectors ; Molecular Sequence Data ; Oligodeoxyribonucleotides ; Plants, Genetically Modified ; *Plants, Toxic ; Plasmids ; Promoter Regions, Genetic ; Restriction Mapping ; Rhizobium/genetics ; Tobacco/*genetics/*metabolism ; Trans-Activators/*genetics/*metabolism ; Transcription, Genetic ; Zea mays/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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