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        In Planta Agrobacterium-Mediated Transformation by Vacuum Infiltration

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        In planta Agrobacterium -mediated transformation using vacuum infiltration results in transgenic Arabidopsis thaliana without the use of sterile conditions or plant regeneration. Plants are grown in pots, in standard potting mix. Agrobacterium tumefaciens , carrying an appropriate plant transformation vector, is suspended in an infiltration medium that contains, at a minimum, sucrose and the surfactant Silwet L-77. Flower buds are immersed in the suspension of A. tumefaciens . The application of a vacuum drives the bacteria into the intercellular air spaces. A portion of the Agrobacterium Ti plasmid known as the T-DNA region, which has been engineered to carry a selectable marker, becomes integrated into the plant genomic DNA. Plants are allowed to set seed. Seeds are germinated in selective conditions to recover transformants.
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