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Comparison of ethylene-producing Pseudomonas syringae strains isolated from kudzu (Pueraria lobata) with Pseudomonas syringae pv. phaseolicola and Pseudomonas syringae pv. glycinea

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Abstract

The relationships among strains of Pseudomonas syringae pv. glycinea (Psg) and Pseudomonas syringae pv. phaseolicola (Psp) isolated from kudzu ( Pueraria lobata) and bean ( Phaseolus vulgaris) were investigated. All strains tested showed a close phenotypic similarity, with the exception of the utilization of inositol and mannitol as well as the production of toxins. On this basis the strains could be divided into three groups. Group 1 consists of all strains of pathovar glycinea, group 2 includes all Psp strains isolated from kudzu, and all Psp strains isolated from bean belong to group 3. This grouping was also reflected in the genetic fingerprints using the polymerase chain reaction (PCR) with primers that anneal to dispersed repetitive bacterial sequences (rep-PCR). The rep-PCR generated fingerprints were unique for each of the three groups. The strains of group 2, Psp strains isolated from kudzu, possess certain characteristics of group 1 (ethylene production) and group 2 (phaseolotoxin production). The Psp strains from kudzu can be clearly differentiated from Psp strains isolated from bean. They utilize mannitol, produce ethylene, and are strongly pathogenic to kudzu, bean, and soybean. The results obtained show that the Psp strains from kudzu should be separated from the pathovar phaseolicola and should represent their own pathovar.

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Völksch, B., Weingart, H. Comparison of ethylene-producing Pseudomonas syringae strains isolated from kudzu (Pueraria lobata) with Pseudomonas syringae pv. phaseolicola and Pseudomonas syringae pv. glycinea. European Journal of Plant Pathology 103, 795–802 (1997). https://doi.org/10.1023/A:1008686609138

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  • DOI: https://doi.org/10.1023/A:1008686609138

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