Photorhabdus thracensis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacteriales, Family Morganellaceae, Genus Photorhabdus,
Photorhabdus thracensis (Hazir et al. 2004) Machado et al. 2018.

Basonym:
Photorhabdus luminescens subsp. thracensis Hazir et al. 2004, Photorhabdus temperata subsp. thracensis (Hazir et al.
2
-004) Tailliez et al. 2010.
Gram-negative, large rods, 0.9-1.4 x 3-6 µm, with a tendency to form short filaments.  
Inclusion bodies are present.
Colonies on nutrient agar are convex, granular, variable in diameter (0.3-1.5 mm)
translucent and orange. Olive green colonies on NBTA. Strongly luminescent and
mucoid. Maximum temperature for growth is 34-35 ºC in nutrient broth and 37 ºC in
nutrient broth with 0.5% NaCl. Haemolysis is variable.
Isolated from the intestine of the entomopathogenic nematode Heterorhabditis bacteriophora, collected from sunflower field,
fallow field or pine forest in Turkey.
Undetermined.
  1. Hazir S, Stackebrandt E, Lang E, Schumann P, Ehlers RU, Keskin N. Two new subspecies of Photorhabdus luminescens,
    isolated from Heterorhabditis bacteriophora (Nematoda: Heterorhabditidae): Photorhabdus luminescens subsp. kayaii subsp.
    nov. and Photorhabdus luminescens subsp. thracensis subsp. nov. Syst Appl Microbiol 2004; 27:36-42.
  2. Machado RAR, Wuthrich D, Kuhnert P, Arce CCM, Thonen L, Ruiz C, Zhang X, Robert CAM, Karimi J, Kamali S, et al. Whole-
    genome-based revisit of Photorhabdus phylogeny: proposal for the elevation of most Photorhabdus subspecies to the species
    level and description of one novel species Photorhabdus bodei sp. nov., and one novel subspecies Photorhabdus laumondii
    subsp. clarkei subsp. nov. Int J Syst Evol Microbiol 2018; 68:2664-2681.
  3. Tailliez P, Laroui C, Ginibre N, Paule A, Pages S, Boemare N. Phylogeny of Photorhabdus and Xenorhabdus based on universally
    conserved protein-coding sequences and implications for the taxonomy of these two genera. Proposal of new taxa: X.
    vietnamensis sp. nov., P. luminescens subsp. caribbeanensis subsp. nov., P. luminescens subsp. hainanensis subsp. nov., P.
    temperata subsp. khanii subsp. nov., P. temperata subsp. tasmaniensis subsp. nov., and the reclassification of P. luminescens
    subsp. thracensis as P. temperata subsp. thracensis comb. nov. Int J Syst Evol Microbiol 2010; 60:1921-1937.
Positive results for catalase, esculin hydrolysis, tryptophan deaminase, urease (weakly), acid production from D-fructose, D-glucose,
inositol, D-mannose, maltose, and N-acetyl-glucosamine.

Negative results for arginine dihydrolase, gelatin hydrolysis, H2S production, indole production, lysine decarboxylase, nitrate
reduction, ornithine decarboxylase, oxidase,
Voges-Proskauer test (positive in Tailliez study), acid production from D-mannitol, ribose
and D-trehalose.

Variable results for citrate utilization and beta-galactosidase.
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