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 A; SANTIAGO A. CATALANO; AMOROSO M.J.
Lugar:
Riverside, California
Reunión:
Congreso; XXXI Willi Hennig Meeting; 2012
Institución organizadora:
Willi Hennig Society
Resumen:
The genus Streptomyces comprises a group of bacteria species with high 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 level of substances
toxic for humans, heavy metals among them. Although several studies have been conducted in different
species of the genus in order to disentangle the mechanisms associated to heavy metal resistance, little is
known about how they have evolved along Streptomyces phylogeny. In this study we built the largest
Streptomyces phylogeny generated up to date comprising six genes, 113 species of Streptomyces and 27
outgroups. The parsimony-based phylogenetic analysis indicated that (i) Streptomyces is monophyletic
and (ii) it appears as sister clade of a group formed by Kitasatospora and Streptacidiphilus species, both
genera also monophyletic. Streptomyces strains resistant to heavy metals are not confined to a single lineage
but widespread along Streptomyces phylogeny. Our result in combination with genomic, physiological
and biochemical data suggest that the resistance to heavy metals originated several times and by different
mechanisms in Streptomyces history