Syringomycin production and holcus spot disease of maize: Plasmid-associated properties inPseudomonas syringae |
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| Authors: | Carlos F Gonzalez Anne K Vidaver |
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| Institution: | (1) Department of Plant Pathology, University of California, 95616 Davis, California, USA;(2) Department of Plant Pathology, University of Nebraska, Lincoln, 68583, Nebraska, USA |
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| Abstract: | The majority of pathogenic strains ofPseudomonas syringae produce the phytotoxin syringomycin. After treatment ofP. syringae with acridine organe, some surviving isolates were unable to produce the toxin or disease in maize plants. DNA analysis of
strain HS191 revealed the presence of a single, 35-megadalton plasmid, designated pCG131; no detectable plasmid was seen in
the cured derivative. Comparative studies with the parent and cured strains showed an association between the presence of
the plasmid and the following properties: syringomycin production, resistance to bacteriocin PSC-1B, and resistance to phages
Psp1 and Psy4A. |
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