You Exude What You Eat: How Carbon-, Nitrogen-, and Sulfur-Rich Organic Substrates Shape Microbial Community Composition and the Dissolved Organic Matter Pool

作者：Jinxin Xu, Qi Chen, Christian Lønborg, Yunyun Li, Ruanhong Cai, Chen He, Quan Shi, Yuxing Hu, Yimeng Wang, Nianzhi Jiao, Qiang Zheng · 发表于：Applied and Environmental Microbiology · 年份：2022 · DOI：10.1128/aem.01558-22 · 被引用次数：10 · 研究领域：Microbial Community Ecology and Physiology、Marine and coastal ecosystems、Marine Biology and Ecology Research

Nitrogen (N)- and sulfur (S)-containing compounds are normally considered part of the labile organic matter pool that fuels heterotrophic bacterial activity in the ocean. Both glycine betaine (GBT) and dimethylsulfoniopropionate (DMSP) are representative N- and S-containing organic compounds, respectively, that are important phytoplankton cellular compounds. The present study therefore examined how the microbial community and the organic matter they produce are influenced by the addition of carbohydrate-containing (glucose), N-containing (GBT), and S-containing (DMSP) organic compounds. The results demonstrate that when these carbon-, N-, and S-rich compounds are added separately, the organic molecules produced by the bacteria growing on them are enriched in the same elements. Similarly, the microbial community composition was also distinct when different compounds were added as the substrate. Overall, this study demonstrates how the microbial communities metabolize and transform different substrates thereby, expanding our understanding of the complexity of links between microbes and substrates in the ocean.