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Biodegradation of polystyrene by Spodoptera litura and Spodoptera frugiperda larvae (Lepidoptera: Noctuidae): Insights into the frass characterization and responses of gut microbiomes

文献类型： 外文期刊

作者： Tang, Ya-Yuan 1 ; Chen, Jian-Ming 2 ; Zhang, Juan 3 ; Wu, Hong 1 ; Wang, Yi-Ping 1 ; Zhang, Jue-Feng 2 ;

作者机构： 1.Zhejiang Agr & Forestry Univ, Coll Forestry & Biotechnol, Hangzhou 311300, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou 310021, Peoples R China

3.Zhejiang Acad Agr Sci, Zhejiang Inst Landscape Plants & Flowers, Hangzhou 311251, Peoples R China

关键词： Spodoptera litura; Spodoptera frugiperda; polystyrene; biodegradation

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）

ISSN： 0304-3894

年卷期： 2025 年 492 卷

页码：

收录情况： SCI

摘要： Polystyrene (PS) biodegradation by some lepidoptera larvae has been demonstrated, but little is known about the Spodoptera litura and Spodoptera frugiperda (Lepidoptera: Noctuidae). Here we confirmed that PS-fed larvae showed significantly higher survival rates than starvation and antibiotic groups, with S. frugiperda consuming PS more efficiently than S. litura (1.52 vs. 0.56 mg larva-1 day-1). PS-frass characterization revealed oxygen-containing groups (C-O, C--O,-OH) with reduced thermal stability and a significant decrease in weight-average molecular weight (S. litura:-6.01 %; S. frugiperda:-8.93 %), evidencing oxidative depolymerization of PS by both species. The gut microbiota (Pedobacter, Achromobacter, Pseudomonas, Acinetobacter, etc.) and functional enzymes (e.g., monooxygenase, dioxygenase, chitinases) were upregulated in PS-fed larvae. Metabolome analysis revealed altered stress responses and reprogrammed metabolic pathways, particularly in lipid and carbohydrate metabolism, which correlated strongly with gut microbiota changes. Overall, we demonstrated the biodegradation of PS by S. litura and S. frugiperda for the first time, and proposed a plausible degradation mechanism mediated by gut microbiota, illustrating both the host and gut microbiomes contributed to PS biodegradation. These findings highlight the feasibility of developing insect-based plastic degradation systems through the isolation of key microbial-enzymatic consortia, offering a sustainable solution for plastic waste management.

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