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Int J Syst Evol Microbiol 59 (2009), 2759-2762; DOI  10.1099/ijs.0.008912-0
© 2009 International Union of Microbiological Societies

Arthrobacter psychrochitiniphilus sp. nov., a psychrotrophic bacterium isolated from Antarctica

Fengping Wang1,{dagger}, Yingbao Gai1,{dagger}, Mingxia Chen2 and Xiang Xiao1

1 Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, PR China
2 School of Life Science, Xiamen University, Xiamen, PR China

Correspondence
Xiang Xiao
xxwfp{at}public.xm.fj.cn

A psychrotrophic Arthrobacter strain, GP3T, was isolated from Adélie penguin guano from Antarctica and characterized. The 16S rRNA gene sequence of the novel strain showed the highest similarity (97.8 %) with that of Arthrobacter psychrolactophilus B7T. The novel strain showed a morphological change from rod to coccus. The growth temperature range of strain GP3T was 0–25 °C, with optimal growth at 20 °C. The strain grew over a salinity range of between 0 and 3 % (w/v) NaCl and the optimal pH for growth was pH 6–8. Strain GP3T contained anteiso-C15 : 0 as the major fatty acid. The major menaquinone was MK-9(H2). The cell-wall peptidoglycan type was of the A3{alpha} variant. The DNA G+C content of strain GP3T was 58.5 mol%. Strain GP3T was able to hydrolyse chitin, Tween 80, starch, cellulose and lactose, but not gelatin, lecithin or urea. In addition to these physiological characteristics, DNA–DNA hybridization studies clearly differentiated strain GP3T from A. psychrolactophilus. The combined results of phylogenetic, physiological and chemotaxonomic studies indicated that strain GP3T represents a novel species of the genus Arthrobacter. The name Arthrobacter psychrochitiniphilus sp. nov. (type strain GP3T=JCM 13874T=CGMCC 1.6355T) is proposed in recognition of the strain's strong chitin-utilizing ability.

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Arthrobacter psychrochitiniphilus sp. nov. GP3T is AJ810896.






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