INVESTIGADORES
BIANCO Maria Isabel
congresos y reuniones científicas
Título:
Early steps in the infection process in two Xanthomonas spp. models: chemotaxis and biofilm formation
Autor/es:
J. GARITA, M. SENA, P. SABUQUILLO, M.I. BIANCO, E. FERRAGUD, C. REDONDO AND J. CUBERO
Lugar:
Beijing
Reunión:
Congreso; 10th International Congress of Plant Pathology - ICPP 2013; 2013
Institución organizadora:
Chinese Society for Plant Pahtology
Resumen:
Chemotaxis and motility, as well as biofilm formation, are crucial steps in the interaction between some bacteria and the plants. Xanthomonas is a genus of bacteria characterized for a high strain-host specialization due to the different virulence mechanisms among the species or even among pathovars within the same species. In the present work we have studied differential patterns in chemotaxis and in the ability to form biofilms, as early virulence events, in different bacterial models that include Xanthomonas arboricola pv. pruni (Xap), causal agent of bacterial spot of stone fruits, and Xanthomonas citri subsp. citri (Xcc), which cause citrus bacterial canker. Differences in surface (swarming type) or in liquid medium movements (swimming type) among strains of Xap were found and correlated to their different growth and ability for biofilm formation as well as taxonomic classification performed by multilocus sequencing and carbon source utilization. Moreover, for Xanthomonas citri subsp. citri, chemotaxis motility and biofilm formation was also correlated with the host range. Narrow Xcc host range strains showed more swimming ability and less capacity for biofilm formation than wide host range strains. In addition, narrow and wide host range strains of Xcc differed in their different responses to the plant stimulus in chemotaxis or biofilm formation processes. Our results confirmed the role of such processes in the different virulence among the Xanthomonas studied.