Study on Diversity of Acidophilic Rare Actinomycetes from Acidic Soil
Acta Microbiologica Sinica(2004)
Abstract
acidophilic actinomycetes were isolated from 10 acidic soil samples collected in Jiangxi Province, Yunnan Province and Beijing. About 90% of them were streptomycetes. 20 representatives of rare actinomycetes were selected by a combination of morphological feature, pH range for growth and cell wall amino acid component. They gave 11 different ARDRA patterns when digested with enzymes BstUⅠ and HhaⅠ. 9 strains shared the same ARDRA pattern, which was moderately similar to the patterns of another 4 strains and distinct from those of the remaining 7 strains. On the basis of 16S rDNA sequence analysis, 18 of the 20 selected strains were assigned to 6 recognized genera. 13 of them fall within the genus Nocardia, and the other 5 strains belong to genera Agrococcus, Arthrobacter, Kitasatospora, Kocuria and Streptacidiphilus, respectively. 2 of the selected strains are members of an as-yet-unnamed novel family (Ellin5034 group). The results show the good diversity of acidophilic rare actinomycetes in acidic soil, with Nocardiae predominant.
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Key words
Fungal Diversity
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