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Communication Dans Un Congrès Année : 2006

HrpL negatively regulates flagellar system in Erwinia amylovora

Résumé

Several previous works seem to indicate that flagellar and hrp genes of Erwinia amylovora are counter-regulated. In the present paper, this hypothesis is confirmed by the analysis of several parameters linked to flagella synthesis in E. amylovora grown in hrp- or non hrp-inducing conditions. Moreover, amongst the various hrp mutants tested, the hrpL regulatory mutant only was more motile, produced more flagellins and showed more flagella than the wild-type strain when cultivated on a hrp-inducing medium. A plasmid carrying hrpL introduced into a hrpL mutant decreased its motility and flagellin production. These results strongly suggest that flagellar synthesis of E. amylovora is under the negative control of HrpL, a positive regulator of hrp genes.
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Dates et versions

hal-02756636 , version 1 (03-06-2020)

Identifiants

  • HAL Id : hal-02756636 , version 1
  • PRODINRA : 16334

Citer

Sophie Cesbron, Marie-Noelle Brisset, Michel Tharaud, J Pierre Paulin. HrpL negatively regulates flagellar system in Erwinia amylovora. 10. International Workshop on Fire Blight, Jul 2004, Bologna, Italy. ⟨hal-02756636⟩

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