Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-1461
Title: Role of the type VI secretion systems during disease interactions of Erwinia amylovora with its plant host
Authors : Kamber, Tim
Pothier, Joël
Pelludat, Cosima
Rezzonico, Fabio
Duffy, Brion
Smits, Theo
Published in : BMC Genomics
Volume(Issue) : 16
Issue : 628
Pages : 1
Pages to: 12
Publisher / Ed. Institution : BioMed Central Ltd.
Publisher / Ed. Institution: London
Issue Date: 17-Aug-2017
Language : Englisch / English
Subjects : Fire blight; RNA-sequencing; Motility; Flagella
Subject (DDC) : 570: Biologie
Abstract: Background: Type VI secretion systems (T6SS) are widespread among Gram-negative bacteria and have a potential role as essential virulence factors or to maintain symbiotic interactions. Three T6SS gene clusters were identified in the genome of E. amylovora CFBP 1430, of which T6SS-1 and T6SS-3 represent complete T6SS machineries, while T6SS-2 is reduced in its gene content. Results: To assess the contribution of T6SSs to virulence and potential transcriptomic changes of E. amylovora CFBP 1430, single and double mutants in two structural genes were generated for T6SS-1 and T6SS-3. Plant assays showed that mutants in T6SS-3 were slightly more virulent in apple shoots while inducing less disease symptoms on apple flowers, indicating that T6SSs have only a minor effect on virulence of E. amylovora CFBP 1430. The mutations led under in vitro conditions to the differential expression of type III secretion systems, iron acquisition, chemotaxis, flagellar, and fimbrial genes. Comparison of the in planta and in vitro transcriptome data sets revealed a common differential expression of three processes and a set of chemotaxis and motility genes. Additional experiments proved that T6SS mutants are impaired in their motility. Conclusion: These results suggest that the deletion of T6SSs alters metabolic and motility processes. Nevertheless, the difference in lesion development in apple shoots and flower necrosis of T6SS mutants was indicative that T6SSs influences the disease progression and the establishment of the pathogen on host plants.
Departement: Life Sciences und Facility Management
Organisational Unit: Institut für Umwelt und Natürliche Ressourcen (IUNR)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
DOI : 10.1186/s12864-017-4010-1
10.21256/zhaw-1461
ISSN: 1471-2164
URI: https://digitalcollection.zhaw.ch/handle/11475/1557
Appears in Collections:Publikationen Life Sciences und Facility Management

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