Transgenic potato plants overexpressing the pathogenesis-related STH-2 gene show unaltered susceptibility to Phytophthora infestans and potato virus X |
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Authors: | C Peter Constabel Charles Bertrand Normand Brisson |
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Institution: | (1) Department of Biochemistry, Université de Montréal, H3C 3J7 Montréal, Canada |
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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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Keywords: | disease resistance pathogenesis-related proteins plant defense genes Solanum tuberosum |
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