Dickeya Diversity and Pathogenic Mechanisms.

The Dickeya genus comprises numerous pathogenic species that cause diseases in various crops, vegetables, and ornamental plants across the globe. The pathogens have become very widespread in recent years, and numerous newly identified Dickeya-associated plant diseases have been reported, which poses an immense threat to agricultural production and is a serious concern internationally. Evidence is accumulating that a diversity of hosts, environmental habitats, and climates seems to shape the abundance of Dickeya species in nature and the differentiation of pathogenic mechanisms. This review summarizes the latest findings on the genome diversity and pathogenic mechanisms of Dickeya spp., with a focus on the intricate virulence regulatory mechanisms mediated by quorum sensing and pathogen-host interkingdom communication systems.