Soil viral-host interactions regulate microplastic- dependent carbon storage

• 成果类型: Article
• 署名作者: Wang, Lu; Lin, Da; Xiao, Ke - Qing; Ma, Li - Juan; Fu, Yan - Mei; Huo, Yu - Xin; Liu, Yanjie; Ye, Mao; Sun, Ming - Ming; Zhu, Dong; Rillig, Matthias C.; Zhu, Yong - Guan
• 署名单位: Chinese Academy of Sciences; Institute of Urban Environment, CAS; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Research Center for Eco-Environmental Sciences (RCEES), CAS; Hebei University; Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS; Chinese Academy of Sciences; Nanjing Institute of Soil Science, CAS; Nanjing Agricultural University; Free University of Berlin
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-11561
• DOI: 10.1073/pnas.241324512
• 发表日期: 2024-11-05
• 关键词: alignment; viruses

摘要

Microplastic is globally regarded as an important factor impacting biogeochemical cycles, yet our understanding of such influences is limited by the uncertainties of intricate microbial processes. By multiomics analysis, coupled with soil chemodiversity characterization and microbial carbon use efficiency (CUE), we investigated how microbial responses to microplastics impacted soil carbon cycling in a long- term field experiment. We showed that biodegradable microplastics promoted soil organic carbon accrual by an average of 2.47%, while nondegradable microplastics inhibited it by 17.4%, as a consequence of the virus-bacteria coadaptations to the microplastics disturbance. In the relevant functional pathways, nondegradable microplastics significantly (P < 0.05) enhanced the abundance and transcriptional activity related to complex carbohydrate metabolism, whereas biodegradable microplastics significantly (P < 0.05) promoted functions involved in amino acid metabolism and glycolysis. Accordingly, viral lysis enhanced in nondegradable microplastics treatments to introduce more complex organic compounds to soil dissolved organic matters, thus benefiting the oligotrophs with high carbon metabolic capabilities in exploitation competition. In contrast, biodegradable microplastics enriched viral auxiliary metabolic genes of carbon metabolism through strate utilization capabilities. These virus-host interactions were also demonstrated in the corresponding soil plastisphere, which would alter microbial resource allocation and metabolism via CUE, affecting carbon storage consequently. Overall, our results underscore the importance of viral-host interactions in understanding the microplastics- dependent carbon storage in the soil ecosystem.