Genetic diversity of African and worldwide strains of Ralstonia solanacearum as determined by PCR-restriction fragment length polymorphism analysis of the hrp gene region

Article Abstract:

The genetic diversity of worldwide strains of Ralstonia solanacearum is investigated by restriction fragment length polymorphism analysis of amplified fragments from the hrp gene region. Five amplified fragments are found to be specific to Ralstonia solanacearum while 15 different profiles are identified among the 120 strains. Most of the biovar 1 strains that originate from African countries such as Madagascar, Angola and Zimbabwe belong to the Asiaticum rather than to the Americanum division. The strains could have come separately from biovar 1 strains originating from the Americas.

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Twitching motility of Ralstonia solanacearum requires a type IV pilus system

Article Abstract:

Research has been conducted on the Ralstonia solanacearum twitching motility, a form of bacterial translocation over the firm surfaces requiring retractile type IV pili. Results indicate that R. solanacearum exhibits twitching motility via the type IV pilus system which contributes to the tomato plant pathogenesis.

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Genetic diversity of Ralstonia solanacearum as assessed by PCR-RFLP of the hrp gene region, AFLP and 16S rRNA sequence analysis, and identification of an African subdivision

Article Abstract:

Research has been conducted on the genetic diversity among Ralstonia solanacearum strains. The use of the AFLP and PCR-RFLP analyses in investigating this diversity is discussed.

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