VII Simposio Internacional de Química 2019 "SIQ 2019" -XII Conferencia "La Ingeniería Química: Desarrollo, potencialidades y sus retos"

VII Simposio Internacional de Química 2019

SIQ 2019

POTENTIAL OF CUBAN NATIVE STRAINS OF GENUS GANODERMA FOR THE DEGRADATION OF XENOBIOTIC COMPOUNDS

Resumen [ES]

Environmental pollution with hazardous industrial wastes containing recalcitrant xenobiotics has become a major ecological issue. White-Rot Fungi (WRF) and they ligninolytic enzymes (laccases and peroxidases) are considered promising biotechnological tools to remove Persistent Organic Pollutants from industrial wastewaters and contaminated ecosystems. A high diversity within the genus Ganoderma has been reported in Cuba; however the diversity of their ligninolytic enzymes and the biotechnological potential of strains belonging to genus Ganoderma remains underexplored. The objectives of this study were: To analyze the diversity of ligninolytic enzymes of Cuban strains from the genus Ganoderma and to evaluate their potential for degradation of dyes and Polycyclic Aromatic Hydrocarbons (PAHs). Thirteen WRF strains were isolated from decayed wood in urban ecosystems in Havana and identified as Ganoderma sp. using a multiplex ITS-based PCR-method. The strains were cultured in SB-U medium with sugarcane molasses and the ligninolytic enzymes activities as well as isozyme analyses were measured on extracellular enzyme extracts. The results showed that Ganoderma sp. strains isolated differed in their ligninolytic enzyme activities, isozymatic profiles and degradative capacity. The strains were able to significantly degrade textile dyes, naphthalene, phenanthrene and fluorene without the addition of redox mediators. The PAH oxidation performed by the extracellular enzymes produced by Ganoderma strains generated non-toxic intermediate metabolites and the possible degradation pathway of these PAHs was determined. These findings hold promises for the development of a practical application for the treatment of textile industry wastewaters, as well as for bioremediation of polluted ecosystems by well-adapted native WRF strains.

Resumen [EN]

Environmental pollution with hazardous industrial wastes containing recalcitrant xenobiotics has become a major ecological issue. White-Rot Fungi (WRF) and they ligninolytic enzymes (laccases and peroxidases) are considered promising biotechnological tools to remove Persistent Organic Pollutants from industrial wastewaters and contaminated ecosystems. A high diversity within the genus Ganoderma has been reported in Cuba; however the diversity of their ligninolytic enzymes and the biotechnological potential of strains belonging to genus Ganoderma remains underexplored. The objectives of this study were: To analyze the diversity of ligninolytic enzymes of Cuban strains from the genus Ganoderma and to evaluate their potential for degradation of dyes and Polycyclic Aromatic Hydrocarbons (PAHs). Thirteen WRF strains were isolated from decayed wood in urban ecosystems in Havana and identified as Ganoderma sp. using a multiplex ITS-based PCR-method. The strains were cultured in SB-U medium with sugarcane molasses and the ligninolytic enzymes activities as well as isozyme analyses were measured on extracellular enzyme extracts. The results showed that Ganoderma sp. strains isolated differed in their ligninolytic enzyme activities, isozymatic profiles and degradative capacity. The strains were able to significantly degrade textile dyes, naphthalene, phenanthrene and fluorene without the addition of redox mediators. The PAH oxidation performed by the extracellular enzymes produced by Ganoderma strains generated non-toxic intermediate metabolites and the possible degradation pathway of these PAHs was determined. These findings hold promises for the development of a practical application for the treatment of textile industry wastewaters, as well as for bioremediation of polluted ecosystems by well-adapted native WRF strains.

Sobre el ponente

Giselle Torres Farradá

Dr. Giselle Torres Farradá

Facultad de Biología, Universidad de La Habana Flag of Cuba
Información Práctica
Ponencia
English (US)
No definido
30 minutos
No definido
Autores
Ana M. Manzano León
Sofie Thijs
Dr. Giselle Torres Farradá
François Rineau
Robert Carleer
Jaco Vangronsveld
Gilda Guerra
Lucía L. Ledo Alonso
Miguel Ramos Leal
Palabras clave
ganoderma
ligninolytic enzymes
persistent organic compounds
polycyclic aromatic hydrocarbons
textile dyes
white-rot fungi