Assessing the ability of white-rot fungi to tolerate polychlorinated biphenyls using predictive mycology

SADAÑOSKI, MARCELA ALEJANDRA; VELÁZQUEZ, JUAN ERNESTO; FONSECA, MARÍA ISABEL; ZAPATA, PEDRO DARÍO; LEVIN, LAURA NOEMÍ; VILLALBA, LAURA LIDIA

Mycology

Talor & Francis Inc

Año: 2018 vol. 9 p. 239 - 249

2150-1203

The aim of the present study was to assess the ability of different white-rot fungi to tolerate polychlorinated biphenyls (PCBs) using predictive mycology, by relating fungal growth inhibition to ligninolityc enzyme secretion. Fungal strains were grown in the presence of PCBs in solid media and their radial growth values were modelled through the Dantigny-logistic like function in order to estimate the time required by the fungal colonies to attain half their maximum diameter. The principal component analysis (PCA) revealed an inverse correlation between strain tolerance to PCBs and the laccase secretion over time, being laccase production closely associated with fungal growth capacity. Finally, a PCA was run to regroup and split between resistant and sensitive fungi. Simultaneously, a function associated with a model predicting the tolerance to PCBs was developed. Some of the assayed isolates showed a promising capacity to be applied in PCB bioremediation.