Construction of an efficient polystyrene-degrading microbial consortium based on degrading and non-degrading bacteria predominant in biofilms of marine plastic debris

IF 2.8 2区生物学 Q1 MARINE & FRESHWATER BIOLOGY

Frontiers in Marine Science Pub Date : 2025-04-07 DOI:10.3389/fmars.2025.1569583

Jiannan Wang, Renju Liu, Sufang Zhao, Benjuan Zhang, Zongze Shao

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Abstract

Expanded polystyrene (EPS) has caused significant pollution in marine environments, with potential EPS-degrading bacteria identified on long-term floating EPS biofilms. However, studies on bacterial interactions and consortium reconstruction based on in-situ bacterial diversity remain limited. Marine EPS wastes of different sizes were collected from subtropical coast of Xiamen island, and subjected to bacterial diversity analyses. Co-occurrence network and bacterial characterization revealed that Rhodobacterales and Rhizobiales play important roles in polystyrene (PS) degradation. Bacterial isolation characterization confirmed that Fulvimarina pelagi, Pseudosulfitobacter pseudonitzschiae, Devosia nitrariae, Cytobacillus kochii, and Cytobacillus oceanisediminis as novel PS-degraders. Based on their abundance in situ and PS degradation activity, a consortium was constructed, constituted of F. pelagi, P. halotolerans. and O. granulosus, showed a high degradation capability with PS weight loss by 18.9% in 45 days. These results contribute to marine plastic pollution remediation and resources recycling.

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基于海洋塑料垃圾生物膜中主要降解菌和非降解菌的高效聚苯乙烯降解菌群的构建

膨胀聚苯乙烯（EPS）对海洋环境造成了严重的污染，在长期漂浮的EPS生物膜上发现了潜在的降解细菌。然而，基于原位细菌多样性的细菌相互作用和联合体重建的研究仍然有限。收集了厦门岛亚热带沿海不同大小的海洋EPS废弃物，对其细菌多样性进行了分析。共生网络和细菌特性表明，红杆菌和根瘤菌在聚苯乙烯（PS）降解中起重要作用。细菌分离鉴定证实了pelagi Fulvimarina、pseudonitzschiae伪亚硫酸盐杆菌、Devosia nitrariae、Cytobacillus kochii和Cytobacillus oceanisediminis是新型ps降解剂。根据它们的原位丰度和PS降解活性，构建了一个由F. pelagi， P. halotolerans组成的联合体。和O. granulosus表现出较高的降解能力，在45 d内PS失重18.9%。研究结果有助于海洋塑料污染的修复和资源回收利用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Marine Science Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.10

自引率

16.20%

发文量

2443

审稿时长

14 weeks

期刊介绍： Frontiers in Marine Science publishes rigorously peer-reviewed research that advances our understanding of all aspects of the environment, biology, ecosystem functioning and human interactions with the oceans. Field Chief Editor Carlos M. Duarte at King Abdullah University of Science and Technology Thuwal is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, policy makers and the public worldwide. With the human population predicted to reach 9 billion people by 2050, it is clear that traditional land resources will not suffice to meet the demand for food or energy, required to support high-quality livelihoods. As a result, the oceans are emerging as a source of untapped assets, with new innovative industries, such as aquaculture, marine biotechnology, marine energy and deep-sea mining growing rapidly under a new era characterized by rapid growth of a blue, ocean-based economy. The sustainability of the blue economy is closely dependent on our knowledge about how to mitigate the impacts of the multiple pressures on the ocean ecosystem associated with the increased scale and diversification of industry operations in the ocean and global human pressures on the environment. Therefore, Frontiers in Marine Science particularly welcomes the communication of research outcomes addressing ocean-based solutions for the emerging challenges, including improved forecasting and observational capacities, understanding biodiversity and ecosystem problems, locally and globally, effective management strategies to maintain ocean health, and an improved capacity to sustainably derive resources from the oceans.