| Erwinia piriflorinigrans |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Enterobacterales, Family Erwiniaceae, Genus Erwinia,
Erwinia piriflorinigrans Lopez et al. 2011.
Erwinia piriflorinigrans Lopez et al. 2011.
Gram-negative, straight rods. Motile. Non-encapsulated. Non-spore-forming.
Colonies on King’s medium B areg non-fluorescent, circular, white, slightly convex,
mucoid, 2-3 mm in diameter with regular margins after 48 h at 25 ºC. Produces
convex colonies on Sucrose Nutrient agar and CCT media and produces levan.
Grows in nutrient broth at 25 and 30 ºC but not at 37 ºC or higher. Does not use
calcium galacturonate in Sutton’s medium. Facultatively anaerobic. No ice nucleation
activity.
mucoid, 2-3 mm in diameter with regular margins after 48 h at 25 ºC. Produces
convex colonies on Sucrose Nutrient agar and CCT media and produces levan.
Grows in nutrient broth at 25 and 30 ºC but not at 37 ºC or higher. Does not use
calcium galacturonate in Sutton’s medium. Facultatively anaerobic. No ice nucleation
activity.
Isolated from necrotic pear blossoms of Ercolini (Coscia) and Tendral pear trees.
Causes necrosis of pear blossoms. Experimental infection in tomato and tobacco plants produce a hypersensitive reaction.
- Lopez MM, Rosello M, Llop P, Ferrer S, Christen R, Gardan L. Erwinia piriflorinigrans sp. nov., a novel pathogen that causes
necrosis of pear blossoms. Int J Syst Evol Microbiol 2011; 61:561-567. - Rezzonico F, Smits THM, Born Y, Blom J, Frey JE, Goesmann A, Cleenwerck I, de Vos P, Bonaterra A, Duffy B, et al. Erwinia
gerundensis sp. nov., a cosmopolitan epiphyte originally isolated from pome fruit trees. Int J Syst Evol Microbiol 2016; 66:1583-
1592.
Positive results for catalase, citrate utilization, beta-galactosidase, Tween 20 hydrolysis, Voges-Proskauer test, acid production from
D-adonitol, L-arabinose, glucose (without gas production), D-mannitol, raffinose, and sucrose.
Can utilize glycerol, L-arabinose, ribose, D-xylose, adonitol, galactose, D-glucose, D-fructose, myo-inositol, mannitol,
N-acetylglucosamine, melibiose, sucrose, trehalose, raffinose, beta-gentiobiose methyl-alpha-glucoside, D-fucose, D- and L-alanine,
L-serine, L-proline, fumarate, D-gluconate, L-glutamate, L-malate and succinate.
Negative results for arginine hydrolysis, gelatinase, H2S production, indole production, lysine decarboxylase, nitrate reduction, ornithine
decarboxylase, oxidase, Tween 80 hydrolysis, tryptophan deaminase, urease, acid production from amygdalin, D-arabitol, glycerol,
gluconate, 2-ketogluconate, D-mannose, maltose, raffinose, L-rhamnose, sorbitol, and xylitol.
Variable results for acid production from inositol and melibiose.
D-adonitol, L-arabinose, glucose (without gas production), D-mannitol, raffinose, and sucrose.
Can utilize glycerol, L-arabinose, ribose, D-xylose, adonitol, galactose, D-glucose, D-fructose, myo-inositol, mannitol,
N-acetylglucosamine, melibiose, sucrose, trehalose, raffinose, beta-gentiobiose methyl-alpha-glucoside, D-fucose, D- and L-alanine,
L-serine, L-proline, fumarate, D-gluconate, L-glutamate, L-malate and succinate.
Negative results for arginine hydrolysis, gelatinase, H2S production, indole production, lysine decarboxylase, nitrate reduction, ornithine
decarboxylase, oxidase, Tween 80 hydrolysis, tryptophan deaminase, urease, acid production from amygdalin, D-arabitol, glycerol,
gluconate, 2-ketogluconate, D-mannose, maltose, raffinose, L-rhamnose, sorbitol, and xylitol.
Variable results for acid production from inositol and melibiose.
(c) Costin Stoica
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