Early application of low-dose Mn3O4 NMs enhances the UVB resistance of periphytic biofilms through the modulation of antioxidant defense and bacterial community
文献类型：期刊论文
| 作者 | Hu, Qianming3; Liu, Yi3; Wang, Shuqing3; Liu, Zhiheng3; Wang, Wenjing5; Ren, Chaoqin1; Wang, Shanshan2; Bai, Song3; Wu, Xiao3; Yang, Sheng-Tao3,4 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2026-03-01 |
| 卷号 | 291页码:13 |
| 关键词 | Periphytic biofilms Ultraviolet-B Microbial community Microbial community Mn3O4 |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2025.125236 |
| 通讯作者 | Jing, Liandong(schjld@swun.edu.cn) |
| 英文摘要 | Due to its high energy, ultraviolet-B (UVB) radiation poses a significant threat to life across both natural and engineered systems. Periphytic biofilms play a crucial role in aquatic ecosystems; however, their structure and function are highly vulnerable to UVB-induced damage. Therefore, exogenous strategies are urgently needed to enhance their resistance to UVB stress. In this study, a combination of molecular biology techniques and small-scale simulation experiments was employed to investigate the regulatory effects and underlying mechanisms of nano-manganese oxide (Mn3O4 NMs) on periphytic biofilms under UVB exposure. The results demonstrated that the early-stage addition of Mn3O4 NMs (10 mg/L, 100 nm) significantly enhanced biofilm biomass (ash-free dry weight, AFDW) and photosynthetic efficiency (maximum quantum yield, Fv/Fm), accompanied by increased activities of antioxidant enzymes [superoxide dismutase (SOD) and catalase (CAT)], elevated production of extracellular polymeric substances (EPS), and optimized microbial community composition and diversity. Notably, Mn3O4 NMs selectively enriched UVB-tolerant bacterial families, including Chitinophagaceae, Saprospiraceae, Anaerolineaceae, Erythrobacteraceae, and Trueperaceae, thereby enhancing the stability of the microbial co-occurrence network. Functional prediction analysis revealed significant upregulation of pathways related to nitrogen fixation, photoautotrophy, and carbon metabolism. Importantly, Mn3O4 NMs were predominantly retained within the biofilm matrix, significantly reducing manganese release into the water column and thus minimizing potential ecological risks. Overall, this study provides a safe and effective nano-enabled strategy for microbial regulation and ecological restoration in UVB-stressed environments. |
| WOS关键词 | NANOPARTICLES ; RADIATION ; PHOTOSYNTHESIS ; SUPEROXIDE ; DIVERSITY ; IMPACTS ; SYSTEMS ; GROWTH ; ALGAE |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001655192600001 |
| 资助机构 | Fundamental Research Funds for the Central Universities, Southwest Minzu University |
| 源URL | [http://ir.yic.ac.cn/handle/133337/41989]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Jing, Liandong |
| 作者单位 | 1.Aba Teachers Univ, Sch Resources & Environm, Aba Tibetan and Qiang Aut 623002, Sichuan, Peoples R China 2.Southwest Minzu Univ, Chengdu 610041, Peoples R China 3.Southwest Minzu Univ, Sch Chem & Environm, Key Lab Pollut Control Chem & Environm Funct Mat Q, Natl Ethn Affairs Commiss, Chengdu 610041, Peoples R China 4.Southwest Minzu Univ, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu 610041, Peoples R China 5.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Qianming,Liu, Yi,Wang, Shuqing,et al. Early application of low-dose Mn3O4 NMs enhances the UVB resistance of periphytic biofilms through the modulation of antioxidant defense and bacterial community[J]. WATER RESEARCH,2026,291:13. |
| APA | Hu, Qianming.,Liu, Yi.,Wang, Shuqing.,Liu, Zhiheng.,Wang, Wenjing.,...&Jing, Liandong.(2026).Early application of low-dose Mn3O4 NMs enhances the UVB resistance of periphytic biofilms through the modulation of antioxidant defense and bacterial community.WATER RESEARCH,291,13. |
| MLA | Hu, Qianming,et al."Early application of low-dose Mn3O4 NMs enhances the UVB resistance of periphytic biofilms through the modulation of antioxidant defense and bacterial community".WATER RESEARCH 291(2026):13. |
入库方式： OAI收割
来源：烟台海岸带研究所
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