IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Degradation of plant litter by lignocellulolytic fungi: ecological and applied implications
Autor/es:
JULIETA MALLERMAN; LEVIN LAURA; SAPARRAT, MARIO
Lugar:
Nancy
Reunión:
Simposio; 41 New Phytologist Symposium st Plant sciences for the future; 2018
Institución organizadora:
New Phitologist
Resumen:
Plant litter provides the main carbon input in forest ecosystems, wheresubstrate quality strongly influences microbial composition and activity insoils. Connecting microbial activity in ecosystems with potentialapplications in biotechnology has been little explored, but increasedunderstanding of microbial functionality could provide great potential forharnessing natural capacity to degrade and detoxify compounds due tohuman impact. We isolated a total of 19 basidiomycetes associated withleaf litter layer from temperate forests of Argentina, with the objective ofevaluating extracellular lignocellulolytic enzyme systems. We alsoevaluated the capacity of these strains to degrade in vitro leaf litter of twodominant plant species: the native Celtis tala and the exotic Ligustrumlucidum. Significant differences between the two litter types were foundone strain, Leratiomyces ceres, with greater mass loss with the exoticlitter, which was associated mainly with manganese peroxidaseproduction and preferential degradation of alkyl and lignified carboncompounds. We additionally evaluated the combination of litter-lignolyticenzymes for its potential to degrade xenobiotic compounds. The exoticlitter proved to be a good matrix for the immobilization of nonylphenolpolyethoxylates, one of the most extensively employed non-ionicsurfactants with demonstrated toxicity and harmful effects on numerousorganisms. A more profound understanding of plant-microbial interactionsprovides insight for ecosystem functioning and the possibility of functionalapplications in bioremediation.