title: Isolation and characterization of actinomycetes from Brazilian tropical soils.
abstract: Actinomycetes have been isolated from three Brazilian tropical soils. The dispersion and differential centrifugation procedure revealed count values 1.5 to 5.0 times greater than those obtained by the conventional dilution plate technique for all soils and media tested. Eighteen strains, promising for biotechnological applications, were submitted to chemotaxonomic procedures and numerical taxonomy for identification. Two were identified as Amycolatopsis orientalis, one as Streptomyces misakiensis, and two tentatively included or associated to S. chromofuscus and S. griseoruber. The others, all belonging to the Streptomyces genus, could not be fitted into any known species, and were arranged by the UPGMA analysis for classification, as an isolated group. This suggests that the actinomycetes in tropical soils may represent a vast unexplored resource for biotechnology.
authors: Instituto de Microbiologia Prof. Paulo de Góes, Universidade Federal do Rio de Janeiro, CCS, Ilha do Fundão, Brazil.
authors: L T
authors: LT
authors: Semêdo
authors: A A
authors: AA
authors: Linhares
authors: R C
authors: RC
authors: Gomes
authors: G P
authors: GP
authors: Manfio
authors: C S
authors: CS
authors: Alviano
authors: L F
authors: LF
authors: Linhares
authors: R R
authors: RR
authors: Coelho
mesh_terms: D000192:Actinomycetales / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification*; D001938:Brazil; D002241:Carbohydrates; D002473:Cell Wall / Q000737:chemistry; D002498:Centrifugation; D009171:Mycolic Acids; D012988:Soil Microbiology
chemical_list: D002241:Carbohydrates; D009171:Mycolic Acids