1. Arthrobacter psychrochitiniphilus sp. nov., a psychrotrophic bacterium isolated from Antarctica.
- Author
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Wang F, Gai Y, Chen M, and Xiao X
- Subjects
- Antarctic Regions, Arthrobacter classification, Arthrobacter genetics, Cold Temperature, DNA, Bacterial genetics, DNA, Ribosomal genetics, Fatty Acids chemistry, Fatty Acids metabolism, Molecular Sequence Data, Phylogeny, RNA, Ribosomal, 16S genetics, Arthrobacter chemistry, Arthrobacter isolation & purification
- Abstract
A psychrotrophic Arthrobacter strain, GP3(T), 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 B7(T). The novel strain showed a morphological change from rod to coccus. The growth temperature range of strain GP3(T) was 0-25 degrees C, with optimal growth at 20 degrees 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 GP3(T) contained anteiso-C(15 : 0) as the major fatty acid. The major menaquinone was MK-9(H(2)). The cell-wall peptidoglycan type was of the A3alpha variant. The DNA G+C content of strain GP3(T) was 58.5 mol%. Strain GP3(T) 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 GP3(T) from A. psychrolactophilus. The combined results of phylogenetic, physiological and chemotaxonomic studies indicated that strain GP3(T) represents a novel species of the genus Arthrobacter. The name Arthrobacter psychrochitiniphilus sp. nov. (type strain GP3(T)=JCM 13874(T)=CGMCC 1.6355(T)) is proposed in recognition of the strain's strong chitin-utilizing ability.
- Published
- 2009
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