@article{fdi:010085340, title = {{T}he diversity and abundance of soft rot pectobacteriaceae along the {D}urance river stream in the {S}outheast of {F}rance revealed by multiple seasonal surveys}, author = {{B}en {M}oussa, {H}. and {B}ertrand, {C}. and {R}ochelle-{N}ewall, {E}mma and {F}iorini, {S}. and {P}edron, {J}. and {B}arny, {M}. {A}.}, editor = {}, language = {{ENG}}, abstract = {{A}lthough irrigation water is frequently assessed for the presence of plant pathogens, large spatial and temporal surveys that provide clues on the diversity and circulation of pathogens are missing. {W}e evaluate the diversity of soft rot {P}ectobacteriaceae ({SRP}) of the genera {D}ickeya and {P}ectobacterium over 2 years in a temperate, mixed-use watershed. {T}he abundance of isolated strains correlates with the agricultural gradient along the watershed with a positive correlation found with temperature, nitrate, and dissolved organic carbon water concentration. {W}e characterized 582 strains by amplification and sequencing of the gap{A} gene. {M}ultilocus sequence analysis, performed with three housekeeping genes for 99 strains, and core genome analysis of 38 sequenced strains, confirmed for all the strains but one, the taxonomic assignation obtained with the sole gap{A} sequence. {P}ectobacterium spp. (549 isolates) were far more abundant than {D}ickeya spp. (33 isolates). {D}ickeya spp. were only observed in the lower part of the river when water temperature was >19 degrees {C}, and we experimentally confirmed a decreased fitness of several {D}ickeya spp. at 8 degrees {C} in river water. {D}. oryzae dominates the {D}ickeya spp. and {P}. versatile and {P}. aquaticum dominate the {P}ectobacterium spp., but their repartition along the watershed was different, with {P}. versatile being the only species regularly recovered all along the watershed. {E}xcepting {P}. versatile, the {D}ickeya and {P}ectobacterium spp. responsible for disease outbreak on crops were less abundant or rarely detected. {T}his work sheds light on the various ecological behaviors of different {SRP} types in stream water and indicates that {SRP} occupation is geographically structured.}, keywords = {bacterial pathogens ; {D}ickeya ; ecology ; {P}ectobacterium ; water ; {FRANCE} ; {DURANCE} {COURS} {D}'{EAU}}, booktitle = {}, journal = {{P}hytopathology}, volume = {[{E}arly access]}, numero = {}, pages = {[10 ]}, ISSN = {0031-949{X}}, year = {2022}, DOI = {10.1094/phyto-12-21-0515-r}, URL = {https://www.documentation.ird.fr/hor/fdi:010085340}, }