| Erwinia rhapontici |
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Legend: + positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d positive 25-74% of strains
Differential characters:
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Enterobacterales, Family Erwiniaceae, Genus Erwinia,
Erwinia rhapontici (Millard 1924) Burkholder 1948.
Old synonyms: Phytomonas rhapontica Millard 1924, Pectobacterium rhapontici (Millard 1924) Patel and Kulkarni 1951, Erwinia
carotovora biovar rhapontici (Millard 1924) Dye 1969.
Erwinia rhapontici (Millard 1924) Burkholder 1948.
Old synonyms: Phytomonas rhapontica Millard 1924, Pectobacterium rhapontici (Millard 1924) Patel and Kulkarni 1951, Erwinia
carotovora biovar rhapontici (Millard 1924) Dye 1969.
Gram negative, straight bacilli. Motile by peritrichous flagella. Non-spore-forming.
Colonies on YPDA medium,after 48 h at 28 ºC, are 2 mm, circular white, well-domed
and opaque. Produces a weakly diffusible pink pigment (ferrorosamine). Facultatively
anaerobic. Can grow in KCN broth.
and opaque. Produces a weakly diffusible pink pigment (ferrorosamine). Facultatively
anaerobic. Can grow in KCN broth.
Isolated from plants.
Causes a crown rot of rhubarb (Rheum rhaponticum) that extends into the center of the root, pink grain of wheat and internal browning
of hyacinth bulbs. Also associated with lesions caused by other bacteria. Rots potato, onion, and cucumber slices slowly, weakly, and
erratically.
Phytopathogenicity may be due to the release of proferrorosamines.
of hyacinth bulbs. Also associated with lesions caused by other bacteria. Rots potato, onion, and cucumber slices slowly, weakly, and
erratically.
Phytopathogenicity may be due to the release of proferrorosamines.
- Don J. Brenner and J.J. Farmer III, 2001. Family I. Enterobacteriaceae. In: Bergey’s Manual of Systematic Bacteriology, Second
edition, Vol two, part B, George M. Garrity (Editor-in-Chief), pp 587-897.
Positive results for catalase, H2S production, nitrate reduction, acid production from L-arabinose, cellobiose, esculin, fructose,
D-galactose, glucose (without gas), beta-methyl-glucoside, glycerol, myo-inositol, inulin, lactose, lyxose, maltose, D-mannose,
melezitose, melibiose, raffinose, L-rhamnose, D-ribose, salicin, sorbitol, starch, sucrose, trehalose , and xylitol.
Negative results for arginine dihydrolase, gelatinase, indole production, pectinase, oxidase, urease, acid production from adonitol,
dextrin, dulcitol, and tagatose.
Variable results for acid production from alpha-methyl-glucoside and D-xylose.
D-galactose, glucose (without gas), beta-methyl-glucoside, glycerol, myo-inositol, inulin, lactose, lyxose, maltose, D-mannose,
melezitose, melibiose, raffinose, L-rhamnose, D-ribose, salicin, sorbitol, starch, sucrose, trehalose , and xylitol.
Negative results for arginine dihydrolase, gelatinase, indole production, pectinase, oxidase, urease, acid production from adonitol,
dextrin, dulcitol, and tagatose.
Variable results for acid production from alpha-methyl-glucoside and D-xylose.
(c) Costin Stoica
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