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- W2893670472 abstract "The identification of the virulence factors of plant-pathogenic bacteria has relied on the testing of individual mutants on plants, a time-consuming process. Transposon sequencing (Tn-seq) is a very powerful method for the identification of the genes required for bacterial growth in their host. We used this method in a soft-rot pathogenic bacterium to identify the genes required for the multiplication of Dickeya dadantii in chicory. About 100 genes were identified showing decreased or increased fitness in the plant. Most had no previously attributed role in plant–bacterium interactions. Following our screening, in planta competition assays confirmed that the uridine monophosphate biosynthesis pathway and the purine biosynthesis pathway were essential to the survival of D. dadantii in the plant, as the mutants ∆carA, ∆purF, ∆purL, ∆guaB and ∆pyrE were unable to survive in the plant in contrast with the wild-type (WT) bacterium. This study also demonstrated that the biosynthetic pathways of leucine, cysteine and lysine were essential for bacterial survival in the plant and that RsmC and GcpA were important in the regulation of the infection process, as the mutants ∆rsmC and ∆gcpA were hypervirulent. Finally, our study showed that D. dadantii flagellin was glycosylated and that this modification conferred fitness to the bacterium during plant infection. Assay by this method of the large collections of environmental pathogenic strains now available will allow an easy and rapid identification of new virulence factors." @default.
- W2893670472 created "2018-10-05" @default.
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- W2893670472 date "2018-11-15" @default.
- W2893670472 modified "2023-10-18" @default.
- W2893670472 title "Identification by Tn-seq of<i>Dickeya dadantii</i>genes required for survival in chicory plants" @default.
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- W2893670472 doi "https://doi.org/10.1111/mpp.12754" @default.
- W2893670472 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6637903" @default.
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- W2893670472 hasPublicationYear "2018" @default.
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