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Regeneration andAgrobacterium-mediated transformation ofForsythia xintermedia "Spring Glory"
1INRA C.R. Angers-Station d'Amélioration des Espèces Fruitières et Ornementales 42, rue Georges Morel-49071, Beaucouzé Cedex, France.
Plant Cell Reports
|November 2, 2013
Summary
Forsythia x intermedia "Spring Glory" plants were genetically modified using Agrobacterium tumefaciens, resulting in transgenic shoots expressing the gus gene. Stable T-DNA integration was confirmed in mature plants, demonstrating successful genetic transformation.
Area of Science:
- Plant Biotechnology
- Molecular Biology
- Genetics
Background:
- Plant transformation is crucial for crop improvement and genetic studies.
- Agrobacterium tumefaciens-mediated transformation is a widely used method for introducing foreign genes into plants.
- Forsythia x intermedia is an ornamental plant with potential for horticultural applications.
Purpose of the Study:
- To develop an efficient method for genetic transformation of Forsythia x intermedia 'Spring Glory' using Agrobacterium tumefaciens.
- To confirm the stable integration and expression of introduced genes in transgenic Forsythia plants.
- To assess the feasibility of using genetic transformation for improving ornamental plant traits.
Main Methods:
- In vitro culture of Forsythia x intermedia 'Spring Glory' internode explants.
- Agrobacterium tumefaciens-mediated transformation using strain EHA 101 and plasmid pFAJ3000.
- Selection of transgenic shoots using kanamycin and assessment of gene expression via beta-glucuronidase assays.
- Molecular confirmation using Southern blot and PCR analyses.
Main Results:
- Transgenic shoots were regenerated from explants with an average efficiency of 1%.
- Beta-glucuronidase (GUS) activity and kanamycin resistance confirmed gene integration and expression.
- Southern blot and PCR analyses provided molecular evidence of T-DNA integration.
- Mature transgenic plants exhibited stable GUS activity in various organs.
Conclusions:
- Agrobacterium tumefaciens-mediated transformation is effective for generating transgenic Forsythia x intermedia 'Spring Glory' plants.
- Stable integration and expression of the gus and npt II genes were achieved.
- This study provides a foundation for further genetic improvement of Forsythia cultivars.
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