Erwinia chrysanthemi


Erwinia chrysanthemi
Erwinia chrysanthemi
Scientific classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Gamma Proteobacteria
Order: Enterobacteriales
Family: Enterobacteriaceae
Genus: Erwinia
Species: E. chrysanthemi
Binomial name
Erwinia chrysanthemi
Burkholder et al. 1953
Synonyms

Pectobacterium chrysanthemi
Erwinia carotovora var. chrysanthemi
Pectobacterium carotovorum var. chrysanthemi
Dickeya chrysanthemi
Pectobacterium parthenii
Pectobacterium parthenii var. dianthicola
Pectobacterium parthenii var. chrysanthemi

Erwinia chrysanthemi is a gram-negative bacillus that belongs to the family Enterobacteriaceae. It is a close relative of E. coli and other animal pathogens that include Salmonella, Shigella, Klebsiella, Proteus and Yersinia. Members of this family are facultative anaerobes, able to ferment sugars to lactic acid, have nitrate reductase, but lack oxidases. Even though many clinical pathogens are part of the Enterobacteriaceae family, most members of this family are plant pathogens.

In the natural plant environment, Erwinias cause plant maladies such as necrosis, blight and “soft rot,” a progressive tissue maceration[disambiguation needed ]. Erwinia chrysanthemi contains many pectinases that are able to macerate and break down the plant cell wall material. This exposed part of the plant releases nutrients that can facilitate bacterial growth. Commonly infected plants include potato tubers, bulbs of vegetables, and ornamental crops.



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