Análisis de comunidades bacterianas asociadas a la rizósfera de especies vegetales de Miconia zamorensis y Erato polymnoides en suelos contaminados por metales pesados.

Abstract

In certain contaminated ecosystems, various microorganisms such as bacteria can improve biomass production and tolerance of plants to heavy metals as stress conditions. In this context, the present study seeks the identification and comparison of the bacterial communities that are associated to vegetal species (i.e. Miconia zamorensis and Erato polymnoides) using molecular techniques: PCR and Sanger sequencing. Bacterial isolates were isolated from soil samples from the rhizosphere contaminated by heavy metals. Molecular analysis was based on the amplification of a partial region of 16S rRNA. The phylogenetic analysis showed that the isolated microorganisms belong to three genera: Bacillus, Lysinibacillus and Serratia, which are related to bacterial genera with PGPR (plant growth promoting rhizobacteria) capacity. Projects can be formulated to remediate contaminated soils with heavy metals using the identified isolates.