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Transgenic Crops

Transgenic Crops

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Transgenic Crops

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  1. Transgenic Crops Group #7 Jeremiah Johnson Anna Zaklikowski Jessica Frasier

  2. Introduction • Background • Transgenic Crop – A plant that contains a gene or genes which have been artificially inserted instead of the plant acquiring them through pollination

  3. Description • Overview of the process for creating transgenic plants

  4. History & Methods • 1983 Disarming of Agrobacterium tumefaciens (Ti plasmid) for use in gene transfers • 1987 Invention of gene gun • Present status

  5. Use of bacterium Bacillus thuringiensis Natural Insecticide Targets specific receptors Cotton, Potatoes, Tomatoes Dutch Elm Disease Caused by fungus – Ceratocystis ulmi Controlled by bacterium Pseudomonas syringue Research in seedlings and mature trees Applications & Advantages Image:Results of insect infestation on Bt (right) and non-Bt (left) cotton bolls. Source: USDA

  6. Applications & Advantages • Flavr-Savr Tomatoes • Kanamycin resistance (kan-r gene) • Allows tomatoes to ripen longer on vine for fuller taste and still be transportable • Round-up Herbicide Resistance • Enable plants to tolerate glyphosate • Cotton, corn, tobacco, tomatoes, soybeans

  7. Risks & Concerns • Loss of Biodiversity • Superweeds • Transgenic Crop Effectiveness

  8. Risks and Concerns • Human Health Risks • Corporate Control of Food Supply

  9. Conclusions • Future possibilities • Turfgrass for lawns • Plant-based vaccines • Transgenic crops offer hardier varieties • Risks cannot be ignored