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Dickeya dadantii Samson et al., 2005
This is a Gram-negative bacterium that infects various crops causing soft rots and wilts. The type strain has been isolated from Pelargonium. After entering the plant tissues, it can reside in the apoplast, causing a latent infection without any symptoms. Under favourable conditions such as high humidity levels, a shift to pathogenic growth occurs. Soft rot is due to secretion of pectinases, which destroy the middle lamella of the plant cell wall, where pectin acts as a "glue". Previously, the bacterium has been known as Erwinia chrysanthemi 3937.
Dickeya dadantii subsp. dadantii