PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Heavy metal and pesticide tolerant strains are widespread along Streptomyces phylogeny
Autor/es:
ALVAREZ, ANALÍA; CATALANO, SANTIAGO ANDRES; AMOROSO MARÍA JULIA
Lugar:
Riverside, California
Reunión:
Congreso; XXXII Meeting de la Sociedad Willi Hennig; 2012
Institución organizadora:
Sociedad Willi Hennig
Resumen:
The genus Streptomyces (Actinomycetales) comprises a large group of bacteria species with economic importance. Several of these species are employed at industrial scale for the production of useful compounds. Other characteristic found in different strains within this genus is their capability to tolerate high levels of substances toxic for humans, among them heavy metals and herbicides. Although several studies have studied the mechanisms responsible for that behavior, little is known about its evolution along Streptomyces history. For instance, it is not known whether the tolerance is a quality of a particular phylogenetic lineage within the genus or it is widespread along the whole genus. In order to answer this question we built the largest Streptomyces phylogeny generated up to date comprising six genes and 100 Streptomyces species, most sequences downloaded from GenBank. In addition, ten species of Kitasatopsora, nine species of Streptacidiphilus (both genus of the Streptomycetaceae family) and 21 of other species of Actinomycetales were included as outgroups. The parsimony-based phylogenetic analysis indicated that i) The genus Streptomyces was monophyletic ii) Streptomyces was sister to a clade formed by Kitasatospora and Streptacidiphilus species, both genera also monophyletic iii) Forty Streptomyces strains previously found to be heavy-metal or herbicide tolerant where placed in different Streptomyces phylogenetic lineages.