雅罗维亚
酵母
生物
生物量(生态学)
食品科学
化学
生物化学
农学
作者
Vitória Petra de Oliveira Barros,Júlio Ricardo Macedo Silva,Vânia Maria Maciel Melo,Pâmela Santos Terceiro,I. N. de Oliveira,Johnnatan Duarte de Freitas,Orlando Francisco da Silva Moura,João Xavier de Araújo-Júnior,Érica Erlanny da Silva Rodrigues,Marcelo Maraschin,Fabiano L. Thompson,Melissa Fontes Landell
出处
期刊:Chemosphere
[Elsevier]
日期:2024-05-01
卷期号:355: 141807-141807
标识
DOI:10.1016/j.chemosphere.2024.141807
摘要
The present study investigates the potential for biosurfactant production of 19 marine yeast species obtained from zoanthids. Using the emulsification index test to screen the samples produced by the marine yeasts, we verified that five isolates exhibited an emulsification index ≥50%. Additional tests were performed on such isolates, including oil displacement, drop collapse, Parafilm M assay, and surface tension measurement. The tolerance of produced biosurfactants for environmental conditions was also analyzed, especially considering the media's temperature, pH, and salinity. Moreover, the surfactant's ability to emulsify different hydrocarbon sources and to metabolize kerosene as the sole carbon source was evaluated in vitro. Our results demonstrate that yeast biosurfactants can emulsify hydrocarbon sources under different physicochemical conditions and metabolize kerosene as a carbon source. Considering the Yarrowia lipolytica LMS 24B as the yeast model for biosurfactant production from the cell's wall biomass, emulsification indexes of 61.2% were obtained, even at a high temperature of 120 °C. Furthermore, the Fourier-transform middle infrared spectroscopy (FTIR) analysis of the biosurfactant's chemical composition revealed the presence of distinct functional groups assigned to a glycoprotein complex. Considering the status of developing new bioproducts and bioprocesses nowadays, our findings bring a new perspective to biosurfactant production by marine yeasts, especially Y. lipolytica LMS 24B. In particular, the presented results validate the relevance of marine environments as valuable sources of genetic resources, i.e., yeast strains capable of metabolizing and emulsifying petroleum derivatives.
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