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Related Experiment Videos

Regulated genes in transgenic plants.

P N Benfey, N H Chua

    Science (New York, N.Y.)
    |April 14, 1989
    PubMed
    Summary
    This summary is machine-generated.

    Researchers identified a specific DNA region in petunia plants that controls gene expression in flowers during development. This finding aids in understanding gene regulation in transgenic plants and comparing promoter activity across species.

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    Plant molecular biology·2013

    Area of Science:

    • Plant Molecular Biology
    • Genetics
    • Biotechnology

    Background:

    • Transgenic plants offer a powerful model for studying gene expression regulation.
    • Understanding developmental and tissue-specific gene control is crucial for plant science.

    Purpose of the Study:

    • To identify regulatory elements controlling the expression of the petunia 5-enolpyruvylshikimate-3-phosphate synthase gene.
    • To analyze the tissue-specific and developmental regulation of gene expression in floral tissues.
    • To compare the expression patterns of the identified petunia promoter with the cauliflower mosaic virus 35S promoter.

    Main Methods:

    • Analysis of the petunia 5-enolpyruvylshikimate-3-phosphate synthase gene.
    • Identification of upstream regulatory regions.

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  • Histochemical localization for cell-specific expression analysis in floral tissues.
  • Comparison of promoter activity in different transgenic host species.

    • Main Results:

    • An upstream region conferring tissue-specific and developmentally regulated expression in floral tissues was identified for the petunia gene.
    • Histochemical analysis defined the cell specificity of expression within floral tissues.
    • The cauliflower mosaic virus 35S promoter exhibited specific expression patterns in floral tissues, differing from constitutive expectations.
    • Expression patterns varied across different transgenic host species.

    Conclusions:

    • The identified petunia gene regulatory region provides insights into precise control of gene expression in flowers.
    • Comparative analysis highlights the context-dependent nature of promoter activity, even for widely used promoters like CaMV 35S.
    • Findings contribute to the development of targeted gene expression strategies in plant biotechnology.