| Phaseolibacter flectens |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Enterobacterales, Family Erwiniaceae, Genus
Phaseolibacter, Phaseolibacter flectens (Johnson 1956) Halpern et al. 2013., type species of the genus.
Old synonym: Pseudomonas flectens Johnson 1956.
Phaseolibacter, Phaseolibacter flectens (Johnson 1956) Halpern et al. 2013., type species of the genus.
Old synonym: Pseudomonas flectens Johnson 1956.
Gram-negative, straight rods, 0.5-0.8 x 1.2-2.3 µm. Motile by means of one or two
polar flagella (only when grown on media without sucrose).
polar flagella (only when grown on media without sucrose).
Colonies grown on LB or R2A agar incubated 48h at 28 ºC, are 1 mm in diameter;
while on sucrose-supplemented media, colonies are 3-5 mm in diameter, smooth,
foggy and greyish white in colour and produce large amounts of mucus. Grows at
4-44 ºC (optimum 28-30 ºC) and with 0-60% sucrose (optimum 10-25%). Facultatively
anaerobic.
while on sucrose-supplemented media, colonies are 3-5 mm in diameter, smooth,
foggy and greyish white in colour and produce large amounts of mucus. Grows at
4-44 ºC (optimum 28-30 ºC) and with 0-60% sucrose (optimum 10-25%). Facultatively
anaerobic.
Isolated from French bean (Phaseolus vulgaris).
Plant-pathogenic bacterium on French bean pods.
- Halpern M, Fridman S, Aizenberg-Gershtein Y, Izhaki I. Transfer of Pseudomonas flectens Johnson 1956 to Phaseolibacter gen.
nov., in the family Enterobacteriaceae, as Phaseolibacter flectens gen. nov., comb. nov. Int J Syst Evol Microbiol 2013; 63:268-273.
Description is based on API 20 E, and API 50CH results.
Positive results for arginine dihydrolase, catalase, beta-galactosidase, lysine decarboxylase, ornithine decarboxylase, nitrate reduction
to N2, Voges-Proskauer test, acid production from D-fucose (weak), glycerol, L-arabinose (weak), esculin, D-fructose, D-glucose,
D-ribose (weak), sucrose and D-xylose (weak).
Negative results for gelatin hydrolysis, H2S production, indole production, tryptophan deaminase, oxidase, urease, acid production from
D-arabinose, D-adonitol, D- and L-arabitol, amygdalin, arbutin, cellobiose, dulcitol, erythritol, L-fucose, glycogen, gentiobiose,
gluconate, 2- and 5-ketogluconate, inositol, inulin, lactose, D-lyxose, D-mannose, D-mannitol, maltose, melezitose, raffinose,
L-rhamnose, L-sorbose, D-sorbitol, methyl alpha-D-mannopyranoside, methyl alpha-D-glucopyranoside, N-acetylglucosamine, salicin,
starch, trehalose, turanose, D-tagatose, L-xylose, methyl beta-D-xylopyranoside, and xylitol.
Variable results for citrate utilization (type strain is positive), acid production from D-galactose (type strain is negative) and melibiose
(type strain is negative).
Positive results for arginine dihydrolase, catalase, beta-galactosidase, lysine decarboxylase, ornithine decarboxylase, nitrate reduction
to N2, Voges-Proskauer test, acid production from D-fucose (weak), glycerol, L-arabinose (weak), esculin, D-fructose, D-glucose,
D-ribose (weak), sucrose and D-xylose (weak).
Negative results for gelatin hydrolysis, H2S production, indole production, tryptophan deaminase, oxidase, urease, acid production from
D-arabinose, D-adonitol, D- and L-arabitol, amygdalin, arbutin, cellobiose, dulcitol, erythritol, L-fucose, glycogen, gentiobiose,
gluconate, 2- and 5-ketogluconate, inositol, inulin, lactose, D-lyxose, D-mannose, D-mannitol, maltose, melezitose, raffinose,
L-rhamnose, L-sorbose, D-sorbitol, methyl alpha-D-mannopyranoside, methyl alpha-D-glucopyranoside, N-acetylglucosamine, salicin,
starch, trehalose, turanose, D-tagatose, L-xylose, methyl beta-D-xylopyranoside, and xylitol.
Variable results for citrate utilization (type strain is positive), acid production from D-galactose (type strain is negative) and melibiose
(type strain is negative).
(c) Costin Stoica
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