| The Agrobacterium tumefaciens (At) bacterium can induce its host to produce galls in which the bacterium itself thrives. When the plant tissue is heated somewhat the bacterium dies but the plant continues to rapidly multiply cells in the gall. Apparently At has genetically modified its host in a ‘natural’ way. Genetic laboratories worldwide use this to produce genetically modified plants. As a routine procedure the desired gene – let us say the gene from the bacterium - Baccillus thuringienses – (Bt) that leads to the production of a substance that is toxic for insects is isolated, coupled to a selection marker e.g. conveying herbicide resistance, and cloned. |
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Anton Haverkort
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