Aromatic Hydrocarbon Removal by Novel Extremotolerant <i>Exophiala</i> and <i>Rhodotorula</i> Spp. from an Oil Polluted Site in Mexico

Since Aromatic hydrocarbons are recalcitrant and toxic, strategies to remove them are needed. The aim of this work was to isolate fungi capable of using aromatic hydrocarbons as carbon sources. Two isolates from an oil polluted site in Mexico were identified through morphological and molecular marke...

Full description

Bibliographic Details
Main Authors: Martín R. Ide-Pérez, Maikel Gilberto Fernández-López, Ayixon Sánchez-Reyes, Alfonso Leija, Ramón Alberto Batista-García, Jorge Luis Folch-Mallol, María del Rayo Sánchez-Carbente
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Journal of Fungi
Subjects:
Online Access:https://www.mdpi.com/2309-608X/6/3/135
Description
Summary:Since Aromatic hydrocarbons are recalcitrant and toxic, strategies to remove them are needed. The aim of this work was to isolate fungi capable of using aromatic hydrocarbons as carbon sources. Two isolates from an oil polluted site in Mexico were identified through morphological and molecular markers as a novel <i>Rhodotorula</i> sp. and an <i>Exophiala</i> sp. Both strains were able to grow in a wide range of pH media, from 4 to 12, showing their optimal growth at alkaline pH’s and are both halotolerant. The <i>Exophiala</i> strain switched from hyphae to yeast morphotype in high salinity conditions. To the best of our knowledge, this is the first report of salt triggering dimorphism. The <i>Rhodotorula</i> strain, which is likely a new undescribed species, was capable of removing singled ringed aromatic compounds such as benzene, xylene, and toluene, but could not remove benzo[<i>a</i>] pyrene nor phenanthrene. Nevertheless, these hydrocarbons did not impair its growth. The <i>Exophiala</i> strain showed a different removal capacity. It could remove the polyaromatic hydrocarbons but performed poorly at removing toluene and xylene. Nevertheless, it still could grow well in the presence of the aromatic compounds. These strains could have a potential for aromatic compounds removal.
ISSN:2309-608X