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Analysis of phenanthrene degradation by Ascomycota fungi isolated from contaminated soil from Reynosa, Mexico
Letters in Applied Microbiology ( IF 2.0 ) Pub Date : 2021-02-02 , DOI: 10.1111/lam.13451
Rosa I. de la Cruz‐Izquierdo 1 , Alma D. Paz‐González 1 , Francisco Reyes‐Espinosa 1, 2 , Lenci K. Vazquez‐Jimenez 1 , Martha Salinas‐Sandoval 3 , Martha I. González‐Domínguez 3 , Gildardo Rivera 1
Affiliation  

Polycyclic aromatic hydrocarbons (PAHs) are organic compounds generated mainly by anthropogenic sources. They are considered toxic to mammals, since they have carcinogenic, mutagenic, and genotoxic properties, among others. Although mycoremediation is an efficient, economical, and eco-friendly technique for degrading PAHs, the fungal degradation potential of the phylum Ascomycota has not been widely studied. In this work, we evaluated different fungal strains from the polluted soil of "La Escondida" lagoon in Reynosa, Mexico to know their potential to degrade phenanthrene (PHE). Forty-three soil isolates with the capacity to grow in the presence of PHE (0.1 % w/v) were obtained. The fungi Aspergillus oryzae MF13 and Aspergillus flavipes QCS12 had the best potential to degrade PHE. Both fungi germinated and grew at PHE concentrations of up to 5000 mg L-1 and degraded 235 mg L-1 of PHE in 28 d, with and without an additional carbon source. These characteristics indicate that A. oryzae MF13 and A. flavipes QCS12 could be promising organisms for the remediation of sites contaminated with PAHs and detoxification of recalcitrant xenobiotics.

中文翻译:

墨西哥雷诺萨污染土壤中分离的子囊菌对菲降解的分析

多环芳烃 (PAH) 是主要由人为来源产生的有机化合物。它们被认为对哺乳动物有毒,因为它们具有致癌、致突变和遗传毒性等特性。尽管真菌介导是一种高效、经济且环保的多环芳烃降解技术,但子囊菌门的真菌降解潜力尚未得到广泛研究。在这项工作中,我们评估了来自墨西哥雷诺萨“La Escondida”泻湖污染土壤的不同真菌菌株,以了解它们降解菲 (PHE) 的潜力。获得了 43 种能够在 PHE (0.1 % w/v) 存在下生长的土壤分离物。真菌米曲霉 MF13 和黄曲霉 QCS12 具有最好的降解 PHE 的潜力。两种真菌都在 PHE 浓度高达 5000 mg L-1 的情况下发芽和生长,并在 28 d 内降解了 235 mg L-1 的 PHE,无论是否有额外的碳源。这些特征表明,米曲霉MF13 和黄曲霉QCS12 可能是修复被多环芳烃污染的场地和对顽固的异生物质进行解毒的有希望的生物。
更新日期:2021-02-02
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