P-018 - The sequencing revolution propels a surge in identification of novel Pectobacterium and Dickeya species

Over the past decade, a number of recognized species has dramatically increased within the genera Pectobacterium and Dickeya, key pathogens causing soft rot of various crops. This reflects a growing understanding of these important plant pathogens. Pectobacterium currently includes 21 species, with 10 new species described over the past 7 years, while Dickeya has expanded to 13 species, 5 of which were identified during the same period. The rapid discoveries and descriptions of these novel species are largely due to the sequencing revolution, which has greatly enhanced our ability to quickly and accurately analyze genetic information. In our lab, we have recently identified multiple species of Pectobacterium (e.g., Pectobacterium hawaiiense sp. nov., P. aglaonemum sp. nov.) and Dickeya (e.g., Dickeya ananae sp. nov., D. colocasiae sp. nov.). Some species exhibit unique traits, such as P. aglaonemum sp. nov., which harbors a plasmid identical to that of Salmonella enterica (99.9% similarity). At the University of Hawaii, we are developing comprehensive biological and genomic datasets for all Pectobacterium and Dickeya species.

This research presentation will provide an up-to-date overview of the recently identified species within both genera, highlighting the importance of accurate species and strain identification that enhance our understanding of plant-pathogen interactions and disease epidemiology. This knowledge will be invaluable for developing advanced diagnostic tools and strengthening our capabilities in biosecurity and microbial forensics.