Paenibacillus agarexedens
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Paenibacillus agarexedens ( Wieringa 1941)
Uetanabaro, Wahrenburg, Hunger, Pukall, Spröer, Stackebrandt, de Canhos, Claus and Fritze 2003.
Synonym:
Bacillus agar-exedens Wieringa 1941.
Gram-negative, motile rods, 0.5–1.4 x 2–8 μm. Produce oval spores; usually not
swelling the sporangium.
Colonies on peptone-urea agar are  whitish; colonies sink into the agar within a few
days, but do not liquefy it. Aerobic. No anaerobic growth.
Mesophilic, maximum growth temperature 35-40 ºC, optimum 30  ºC. No growth at pH
5.7 or in 5% NaCl. Growth is inhibited by peptones but inhibition may be neutralized
by urea.
Isolated from soil (Germany, Yugoslavia, Mexico, England). Susceptible to lysozyme.
Undetermined.
  1. Priest F.G., 2009. Genus I.  Paenibacillus  Ash, Priest and Collins 1994. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W.
    Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes,
    Springer, 269-295.
  2. Uetanabaro  A.P., Wahrenburg C., Hunger W., Pukall R., Spröer C., Stackebrandt  E., de Canhos V.P., Claus D. and Fritze D., 2003.
    Paenibacillus agarexedens sp. nov., nom. rev., and Paenibacillus agaridevorans sp. nov. IJSEM 53, 1051-1057.
Positive results for oxidase, catalase, hydrolysis of esculin, hydrolysis of agar,
hydrolysis of hippurate, hydrolysis of starch, acid production from D-glucose.

Negative results for citrate utilization, hydrolysis of urea, nitrate reduction, hydrolysis of dextran, hydrolysis of pectin, hydrolysis of
casein, hydrolysis of Tween 80, hydrolysis of chitin, hydrolysis of gelatin, egg-yolk lecithinase, Voges-Proskauer test, dextranase,
DN-ase, lysine decarboxylase, indole production, dihydroxyacetone, acid production from L-arabinose, glycerol, D-mannitol &
D-xylose.

Variable results for degradation of tyrosine & deamination of phenylalanine.
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Legend: +  positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d positive 25-74% of strains
 
Starch hydrolysis
(Lugol method)
Dextran
hydrolysis
Tyrosine
degradation
Phenylalanine
deamination
P. agarexedens
+
-
d
d
P. agaridevorans
-
+
-
-
Differential characters between agarolytic Paenibacillus species: