Involvement of phaseolotoxin in halo blight of beans: transport and conversion to functional toxin |
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Authors: | Mitchell R E Bieleski R L |
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Institution: | Plant Diseases Division, Department of Scientific and Industrial Research, Private Bag, Auckland, New Zealand. |
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Abstract: | Phaseolotoxin (Nδ-phosphosulfamyl]ornithylalanylhomoarginine) is produced by Pseudomonas phaseolicola (Burkh.) Dows. in liquid culture. When phaseolotoxin was applied to leaves of bean (Phaseolus vulgaris L.) at 0.1 to 1 nmoles/g fresh weight of leaf by a prick-assay procedure, the characteristic “halo” symptom of bean halo blight disease developed after 24 to 48 hours. At higher concentrations (10-100 nmoles/g fresh weight) the systemic symptoms, which are commonly a feature of diseased plants, also developed after 24 to 48 hours. |
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