The ineffectuality of potato protease inhibitor on the extracellular protease from Erwinia carotovora subsp. carotovora |
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Authors: | Jacqueline Heilbronn G. D. Lyon |
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Affiliation: | Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK |
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Abstract: | Growth conditions are described for optimum production of extracellular protease in batch cultures of the soft rot pathogen Erwinia carotovora subsp. carotovora . This protease was inhibited by approximately 96% by 1 mmol/1 EDTA and by 55–6% by 10 mmol/l cysteine thereby classifying it as a metalloprotease. It was not inhibited by a chymotrypsin inhibitor extracted from potato tubers. This evidence suggests that the potato chymotrypsin inhibitor is not associated with resistance of potatoes to E. carotovora subsp. carotovora . |
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