Marine Actinobacteria as a source of compounds for phytopathogen control: An integrative metabolic-profiling / bioactivity and taxonomical approach
Registro en:
10.1371/journal.pone.0170148
instname:Universidad de Bogotá Jorge Tadeo Lozano
reponame:Repositorio Institucional de la Universidad de Bogotá Jorge Tadeo Lozano
Autor
Betancur, Luz A.
Naranjo-Gaybor, Sandra J.
Vinchira-Villarraga, Diana M.
Moreno-Sarmiento, Nubia C.
Maldonado, Luis A.
Suarez-Moreno, Zulma R.
Acosta- González, Alejandro
Padilla-González, Gillermo F.
Puyana, Mónica
Castellanos, Leonardo
Ramos, Freddy A.
Institución
Resumen
Marine bacteria are considered as promising sources for the discovery of novel biologically
active compounds. In this study, samples of sediment, invertebrate and algae were collected
from the Providencia and Santa Catalina coral reef (Colombian Caribbean Sea) with
the aim of isolating Actinobateria-like strain able to produce antimicrobial and quorum
quenching compounds against pathogens. Several approaches were used to select actinobacterial
isolates, obtaining 203 strains from all samples. According to their 16S rRNA gene
sequencing, a total of 24 strains was classified within Actinobacteria represented by three
genera: Streptomyces, Micromonospora, and Gordonia. In order to assess their metabolic
profiles, the actinobacterial strains were grown in liquid cultures, and LC-MS-based analyses
from ethyl acetate fractions were performed. Based on taxonomical classification,
screening information of activity against phytopathogenic strains and quorum quenching
activity, as well as metabolic profiling, six out of the 24 isolates were selected for follow-up
with chemical isolation and structure identification analyses of putative metabolites involved
in antimicrobial activities.