HRPL NEGATIVELY REGULATES FLAGELLAR SYSTEM IN ERWINIA AMYLOVORA
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.
Cesbron, S., Brisset, M.N., Tharaud, M. and Paulin, J.P. (2006). HRPL NEGATIVELY REGULATES FLAGELLAR SYSTEM IN ERWINIA AMYLOVORA. Acta Hortic. 704, 407-408
DOI: 10.17660/ActaHortic.2006.704.64
https://doi.org/10.17660/ActaHortic.2006.704.64
DOI: 10.17660/ActaHortic.2006.704.64
https://doi.org/10.17660/ActaHortic.2006.704.64
Erwinia amylovora, hrpL, flagellin, motility
English
704_64
407-408
- Division Temperate Tree Fruits
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- Division Tropical and Subtropical Fruit and Nuts