Detalle de: The Genomic Landscape Resource of Pseudomonas syringae pv. syringae Strains Isolated from Mango Trees

Pseudomonas syringae pv. syringae is the causal agent of bacterial apical necrosis (BAN) disease of mango trees (Cazorla et al. 1998). BAN disease is the most limiting factor of mango trees in the Mediterranean region because it severely affects mango yield in seasons when weather conditions are favorable to develop the infection by P. syringae pv. syringae (Gutiérrez-Barranquero et al. 2012). P. syringae pv. syringae isolates from mango possess a vast arsenal of virulence factors highlighting the production of the antimetabolite toxin mangotoxin (Arrebola et al. 2003). Other important adaptation traits were also present is P. syringae pv. syringae isolates from mango, such as the production of the exopolysaccharide (EPS) cellulose. The presence of different variants of copper resistance genes have been detected in plasmids belonging to the pPT23A family of plasmids, a family that appears to be indigenous to P. syringae (Sesma et al. 1998). These adaptation traits enhance epiphytic fitness on mango tree surfaces (Gutiérrez-Barranquero et al. 2013a, 2017, 2019; Heredia-Ponce et al. 2020). P. syringae pv. syringae strains from mango form a specific phylotype within the pathovar syringae, strongly associated with the mango host and with mangotoxin production (Gutiérrez-Barranquero et al. 2013b, 2019). To date, genomic information of P. syringae pv. syringae belonging to this specific phylotype remain scarce, with only three genome sequences available in GenBank (Aprile et al. 2021; Martinez-García et al. 2015). Based on a previous phylogenetic distribution study performed within this specific phylotype, including strains from two groups isolated at different times (Aprile et al. 2021), the presence of various phylogenetic subgroups (PSGs) was observed. From these important PSGs, different strains were selected for genome sequencing, to obtain a comprehensive overview of the genomic landscape of the P. syringae pv.