A promoter directing high level expression in pistils of transgenic plants

A promoter directing high level expression in pistils of transgenic plants The promoter of the potato (Solanum tuberosum L.) SK2 gene, encoding a pistil-specific basic endochitinase, was cloned. Various fragments of the SK2-promoter, from 1 kb down to 0.23 kb in length, were fused to the GUS reporter gene. Chimaeric SK2 promoter-GUS fusion constructs were transformed into potato by Agrobacterium tumefaciens-mediated transformation. The SK2-GUS transgenic potato plants exhibited a highly specific GUS activity in the pistil. Expression in the pistil was shown to be developmentally regulated. In addition to the GUS activity in pistils, transgenic plants also showed a much weaker ectopic expression in anthers. In other tissues no systematic expression was detectable. All SK2 promoter fragments analysed conferred pistil-specific expression without significant qualitative or quantitative differences, demonstrating that the regulatory elements mediating this expression pattern are located within a 230 bp SK2 promoter fragment. The SK2 promoter may be used to engineer high levels of expression in pistils of transgenic plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

A promoter directing high level expression in pistils of transgenic plants

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Kluwer Academic Publishers
Copyright © 1997 by Kluwer Academic Publishers
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
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