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Int J Syst Evol Microbiol. 2016 Feb;66(2):1034-1038. doi: 10.1099/ijsem.0.000829. Epub 2015 Dec 8.

Streptosporangium algeriense sp. nov., an actinobacterium isolated from desert soil.

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1​Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure de Kouba, Alger, Algeria.
2​Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, BP 455, Ghardaïa 47000, Algeria.
3​DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany.
4​School of Biology, Newcastle University, Ridley Building, Newcastle upon Tyne, NE1 7RU, UK.


The taxonomic position of a novel actinobacterium, strain 169T, isolated from a sample of Algerian Saharan soil, was determined using a polyphasic taxonomic approach. The aerial mycelium produced non-motile, round- to oval-shaped spores, with a smooth surface, which were sessile or carried by short sporophores. Chemotaxonomically, isolate 169T showed the same results as members of the genus Streptosporangium, but madurose, the so far diagnostic sugar of the genus, was not detected in the whole-cell hydrolysate. Despite the absence of sporangia, the 16S rRNA gene sequence analysis confirmed that strain 169T was a member of the genus Streptosporangium. Strain 169T was most closely related to Streptosporangium jomthongense NBRC 110047T (99.3 % 16S rRNA gene sequence similarity), which is the only non-sporangia-forming species reported among the genus. However, DNA-DNA hybridization studies with this species showed 60 % relatedness. Based upon genotypic and phenotypic data, a novel species, Streptosporangium algeriense sp. nov., is proposed, with 169T ( = DSM 45455T = MTCC 11561T = CCUG 62974T) as the type strain.


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