Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Paenibacillaceae, Genus Paenibacillus, Paenibacillus wynnii
Rodriguez-Diaz, Lebbe, Rodelas, Heyrman, De Vos and Logan, 2005.
Gram-negative, motile, curved rods, 0.5-0.7 x 3-5 µm. Spore is ellipsoidal or oval,
located paracentrally / subterminally, sometimes swelling the sporangium.
Occasionally, the swelling may be at the opposite pole of the sporangium to the spore.
Colonies are circular, convex and glossy, 2 mm in diameter after 3 days on nutrient
agar at 20 ºC. Smaller colonies are transparent and whitish, while larger colonies are
pale yellow–orange with whitish margins and darker centres. They bear a watery
biomass, but may be mucoid. Older colonies are firmly attached to the agar. Aerobic
and anaerobic growth. Growth temperature from 4 ºC (7days) to 37 ºC (variable),
optimum 20 ºC. Can grow in 2% but not in 3 - 7% NaCl media. Growth at pH 6.0-6.5 to
9.5-10, optimum pH 7.0-8.0.
Isolated from soil samples collected from the Mars Oasis, Alexander Island, Antarctica.
- Rodriguez-Diaz,M., Lebbe, L., Rodelas,B., Heyrman, J.,De Vos , P. and Logan,N.A., 2005. Paenibacillus wynnii sp. nov., a novel
species harbouring the nifH gene, isolated from Alexander Island, Antarctica. IJSEM 55, 2093-2099.
- 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,
Positive results for catalase, hydrolysis of esculin, hydrolysis of starch, nitrate reduction, acid production from: N-acetylglucosamine,
amygdalin, cellobiose, fructose, galactose, beta-gentiobiose, D-glucose, glycogen, lactose, maltose, D-mannitol, mannose,
melibiose, raffinose, salicin, sucrose, starch, trehalose, turanose & D-xylose.
Negative results for arginine dihydrolase, citrate utilization, H2S production, hydrolysis of casein, hydrolysis of gelatin, hydrolysis of
urea, indole production, lysine decarboxylase, ornithine decarboxylase, oxidase, tryptophan deaminase, Voges-Proskauer, acid
production from: adonitol, D-arabinose, arabitol, dulcitol, erythritol, D- or L-fucose, inositol, 2- or 5-ketogluconate, lyxose,
methyl-alpha-D-glucoside, methyl-alpha-D-mannoside, sorbose, tagatose & L-xylose.
Variable results for ONPG, acid production from: arbutin, L-arabinose, glycerol, methyl-beta-D-xyloside, inulin, melezitose, ribose,
rhamnose, sorbitol & xylitol.
(c) Costin Stoica