Ribonuclease and proteinase activities in potato leaves immunized against Phytophthora infestans |
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Authors: | Jolanta Floryszak-Wieczorek Halina Gniazdowska-Skoczek |
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Institution: | (1) Department of Plant Physiology Agricultural University of Poznań, Wołyńska 35, 60-637 Poznań, Poland |
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Abstract: | Local treatment of potato plants with arachidonic acid caused a repeated increase of ribonuclease and proteinase activities
in leaves that were directly sprayed with this inducer. Immunization caused no significant systemic changes in the enzyme
activity of other potato leaves.
However, leaves above the induction zone in the first days after the challenge were found to have a pronounced ribonuclease
activity increase in comparison to that gradually rising with disease development in inoculated leaves from plants that were
not induced. The proteolytic activity in the leaves of immunized plants after the challenge was decisively on a lower level
than that in the leaves of noninduced plants subjected to inoculation. |
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Keywords: | acid and neutral proteinases ribonuclease potato leaves systemic acquired resistance Phytophthora infestans |
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