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Production of different pathogenic symptoms and different toxins by strains of Pseudomonas syringae pv. tomato not distinguishable by gel-immunodiffusion assay
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Six strains of Pseudomonas syringae pv. tomato taken from the Plant Diseases Division Culture Collection were indistinguishable by gel immunodiffusion serology, were pathogenic on tomato plant giving two types of symptom, and produced one of two distinct toxins in liquid culture. One group of strains, giving extensive chlorosis surrounding necrotic lesions on tomato plants, produced coronatine. The other group, that gave very limited chlorosis around lesions, produced another toxin, distinguishable from coronatine by the bioassay response induced in bean leaves and by chromatographic behaviour. This toxin was isolated as a carboxylic acid from a concentrate of the growth medium and purified by methods similar to those used for coronatine. It has yet to be characterized, but mass spectrometry and chromatographic studies indicate it is not chemically related to coronatine. [AS]
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 Record created 2017-10-01, last modified 2019-02-22

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