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Transgenic potato plants overexpressing the pathogenesis-related STH-2 gene show unaltered susceptibility to Phytophthora infestans and potato virus X

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Abstract

The STH-2 gene is rapidly activated in potato leaves and tubers following elicitation or infection by Phytophthora infestans. However, its biochemical function remains unknown. In order to ascertain if STH-2 protein is directly involved in the defense of potato against pathogens, the STH-2 coding sequence under the control of the CaMV 35S promoter was introduced into potato plants. Transgenic plants expressing the STH-2 gene were analyzed for an altered pattern of susceptibility to a compatible race of P. infestans and to potato virus X. Results indicate that constitutive expression of the STH-2 gene did not reduce susceptibility of potato to these pathogens.

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Authors and Affiliations

  1. Department of Biochemistry, Université de Montréal, H3C 3J7, Montréal, Canada

    C. Peter Constabel, Charles Bertrand & Normand Brisson

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  1. C. Peter Constabel
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  2. Charles Bertrand
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  3. Normand Brisson
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Constabel, C.P., Bertrand, C. & Brisson, N. Transgenic potato plants overexpressing the pathogenesis-related STH-2 gene show unaltered susceptibility to Phytophthora infestans and potato virus X. Plant Mol Biol 22, 775–782 (1993). https://doi.org/10.1007/BF00027364

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  • DOI: https://doi.org/10.1007/BF00027364

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