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The Effects of Polyacrylic Acid, Acetylsalicylic Acid and Salicylic Acid on Resistance of Cucumber to Colletotrichum lagenarium |
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| Authors: | P. R. Mills R. K. S. Wood |
| Affiliation: | P. R. Mills;, Plant Pathology Research Division, Department of Agriculture for Northern Ireland, Newforge Lane, Belfast BT9 5PX (U.K.) R. K. S. Wood;, Department of Pure and Applied Biology, Imperial College of Science and Technology, Prince Consort Road, London SW7 (U.K.). |
| Abstract: | Injection of cucumber cotyledons with polyacrylic acid (PA), acetylsalicylic acid (ASA) and salicylic acid (SA) induced resistance to inoculations with Colletrichum Iagenarium when inoculation followed injection by 96 h but not by 24 h. Size and number of lesions were greatly decreased. Resistance was greatest in injected cotyledons but was also pronounced in non-injected halves of cotyledons and occasionally in first or second leaves. Incorporation of PA, ASA and SA into liquid shake cultures did not significantly affect growth of the pathogen. Gel electrophoresis of soluble proteins extracted from cotyledons showed that induction of resistance was not accompanied by the appearance of novel soluble proteins. |
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