Metabolic fates and response strategies of microorganisms to aromatic compounds with different structures

Xingshe Liu; Yongjun Liu; Shuang Li; Aining Zhang; Zhe Liu; Zhihua Li

doi:10.1016/j.biortech.2022.128210

Metabolic fates and response strategies of microorganisms to aromatic compounds with different structures

Bioresour Technol. 2022 Dec:366:128210. doi: 10.1016/j.biortech.2022.128210. Epub 2022 Oct 30.

Authors

Xingshe Liu¹, Yongjun Liu², Shuang Li¹, Aining Zhang³, Zhe Liu³, Zhihua Li³

Affiliations

¹ School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China.
² School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: liuyongjun@xauat.edu.cn.
³ School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.

PMID: 36323372
DOI: 10.1016/j.biortech.2022.128210

Abstract

In this study, the metabolic fates and response strategies of microorganisms to aromatic compounds with different structures (phenol, naphthalene, phenanthrene, and pyrene) were comparatively studied. The results indicated that the phenol (90.9%), naphthalene (68.4%), phenanthrene (69.5%), and pyrene (67.1%) could be mineralized, and the biotoxicity also has been drastically reduced. The degradation characteristics and toxic effects were closely related to their chemical structure. The microorganisms showed different response strategies to aromatic compounds with different structures. Phenol had a simple structure and low toxicity, the microbial community structure was simple, and the rapid expression of key enzymes enabled it to be rapidly degraded. For the hydrophobic and complex naphthalene, phenanthrene, and pyrene, the more complex the structure, the higher the microbial diversity, the EPS showed different response for the purpose of improving their bioavailability, and the activity of key enzymes was positively correlated with their structural complexity.

Keywords: Aromatic compounds; Chemical structures; Metabolic fates; Microbial community; Response strategies.

MeSH terms

Biodegradation, Environmental
Naphthalenes
Organic Chemicals
Phenanthrenes* / metabolism
Phenol
Polycyclic Aromatic Hydrocarbons* / metabolism
Pyrenes

Substances

Polycyclic Aromatic Hydrocarbons
pyrene
Pyrenes
phenanthrene
Phenanthrenes
Organic Chemicals
naphthalene
Naphthalenes
Phenol