Xiong Zhuang, Wu Peng, Xiang Peng, Chen Xiaodie, Peng Lianxin, Zou Liang, Xu Junqiang, Li Qiang
Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China.
College of Horticulture and Landscape, Yunnan Plateau Characteristic Agricultural Industry Research Institute, Yunnan Agricultural University, Kunming, Yunnan 650500, China.
J Hazard Mater. 2025 May 5;488:137388. doi: 10.1016/j.jhazmat.2025.137388. Epub 2025 Jan 27.
Currently, although many studies have successfully screened microorganisms with the ability to degrade microplastics (MPs), few studies have focused on their practical application and impacts on the soil-microbe-plant ecosystem. By adding polystyrene-microplastics (PS-MPs) and Acinetobacter radioresistens to the soil, this study aimed to assess their effects on the soil-microbe-plant ecosystem. The findings indicated that PS-MPs enhanced the growth of cucumber (Cucumis sativus L.) and significantly increased the height, stem length, and leaf surface area of cucumber seedlings after inoculation with Acinetobacter radioresistens. The microbial community structure in the rhizosphere soil of cucumber seedlings underwent changes in the high-concentration PS-MPs treatment groups, resulting in a significant increase in both the Shannon index and Simpson index of microorganisms. Compared to the high-concentration PS-MPs treatment, the inoculation treatment increased the soil pH, total potassium content, and iron content, but decreased the total nitrogen content, available phosphorus content, and available potassium content. The transcriptome results showed that cucumber seedlings may respond to environmental changes by regulating photosynthesis, water usage, and phytohormone synthesis. In this study, the growth of cucumber seedlings contaminated with PS-MPs was promoted by the application of Acinetobacter radioresistens. This provides a new perspective for the remediation of PS-MPs contamination in soil.
目前，尽管许多研究已成功筛选出具有降解微塑料（MPs）能力的微生物，但很少有研究关注它们的实际应用以及对土壤-微生物-植物生态系统的影响。通过向土壤中添加聚苯乙烯微塑料（PS-MPs）和抗辐射不动杆菌，本研究旨在评估它们对土壤-微生物-植物生态系统的影响。研究结果表明，PS-MPs促进了黄瓜（Cucumis sativus L.）的生长，并且在接种抗辐射不动杆菌后，显著增加了黄瓜幼苗的株高、茎长和叶面积。在高浓度PS-MPs处理组中，黄瓜幼苗根际土壤中的微生物群落结构发生了变化，导致微生物的香农指数和辛普森指数均显著增加。与高浓度PS-MPs处理相比，接种处理提高了土壤pH值、全钾含量和铁含量，但降低了全氮含量、有效磷含量和有效钾含量。转录组结果表明，黄瓜幼苗可能通过调节光合作用、水分利用和植物激素合成来应对环境变化。在本研究中，抗辐射不动杆菌的应用促进了受PS-MPs污染的黄瓜幼苗的生长。这为土壤中PS-MPs污染的修复提供了新的视角。
