Influence of calcium pretreatment on pectic substance evolution in cucumber fruit (cucumis sativus) duringbotrytis cinerea infection |
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Authors: | C Chardonnet B Doneche |
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Institution: | 1. Institut d’Oenologie, Université de Bordeaux II, 33405, Talence, France
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Abstract: | The role of calcium in protecting plant tissue from infection byBotrytis cinerea was studied in cucumber fruit. A self-defense reaction, consisting of an increase in cell-wall-bound Ca, occurred in the
plant tissue after an injury or an infection. However, it was not sufficient to protect the tissue from the spread of the
fungus, which is accompanied by pectic substance digestion. The degradation induced mainly a decrease in acid- and chelator-soluble
pectin levels, and an increase in water-soluble pectin. Ca treatment of the fruit prior to infection could amplify the cell-wall-bound
Ca and therefore lessen pectin digestion by fungal pectinolytic enzymes. |
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Keywords: | Calcium pectic substances Botrytis cinerea cucumber fruit Cucumis sativus |
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