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Related Experiment Videos

Improved binary vectors for Agrobacterium-mediated plant transformation.

K E McBride1, K R Summerfelt

  • 1Calgene Inc., Davis, CA 95616.

Plant Molecular Biology
|February 1, 1990
PubMed
Summary

New plant transformation vectors offer stable maintenance in Agrobacterium tumefaciens and high-copy replication in Escherichia coli. These vectors feature a gentamycin resistance marker and efficient T-DNA transfer for successful plant transformations.

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Area of Science:

  • Molecular Biology
  • Plant Biotechnology
  • Microbial Genetics

Background:

  • Efficient plant transformation relies on stable and versatile vectors.
  • Existing vectors often face limitations in stability or replication efficiency across different bacterial hosts.
  • Development of novel vectors is crucial for advancing plant genetic engineering.

Purpose of the Study:

  • To engineer novel plant transformation vectors with enhanced stability and replication properties.
  • To incorporate robust selectable markers for bacterial selection.
  • To optimize T-DNA elements for efficient transfer and integration into plant genomes.

Main Methods:

  • Construction of vectors utilizing pRiHRI and ColE1 origins of replication for Agrobacterium tumefaciens and Escherichia coli, respectively.

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  • Incorporation of a gentamycin resistance gene for bacterial selection.
  • Engineering of T-DNA borders and inclusion of the Tn5 neomycin phosphotransferase gene (npt II) and lac Z' gene segment.

    • Main Results:

    • Demonstrated high stability of the prototype vector pCGN1547 in Agrobacterium tumefaciens strain LBA4404.
    • Confirmed efficient T-DNA transfer in tomato transformation experiments using the constructed vectors.
    • Validated the functionality of the gentamycin resistance marker and lac Z' gene for molecular cloning and selection.

    Conclusions:

    • The developed plant transformation vectors provide a stable and efficient system for genetic manipulation.
    • These vectors facilitate robust bacterial selection and precise T-DNA delivery for plant transformation.
    • The engineered components offer flexibility for future cloning and modification in plant biotechnology research.