Molecular characteristics of microbially mediated transformations of Synechococcus-derived dissolved organic matter as revealed by incubation experiments
文献类型：期刊论文
| 作者 | Wang, Yu2; Zheng, Qiang2; Chen, Qi2; Cai, Ruanhong2; He, Chen3; Guo, Weidong4; Jiao, Nianzhi2; Chen, Chang1,5; Shi, Quan3 |
| 刊名 | ENVIRONMENTAL MICROBIOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 21期号:7页码:2533 |
| ISSN号 | 1462-2912 |
| DOI | 10.1111/1462-2920.14646 |
| 英文摘要 | In this study, we investigated the microbially mediated transformation of labile Synechococcus-derived DOM to RDOM using a 60-day experimental incubation system. Three phases of TOC degradation activity (I, II and III) were observed following the addition of Synechococcus-derived DOM. The phases were characterized by organic carbon consumption rates of 8.77, 1.26 and 0.16 mu mol L-1 day(-1), respectively. Excitation emission matrix analysis revealed the presence of three FDOM components including tyrosine-like, fulvic acid-like, and humic-like molecules. The three components also exhibited differing biological availabilities that could be considered as labile DOM (LDOM), semi-labile DOM (SLDOM) and RDOM, respectively. DOM molecular composition was also evaluated using FT-ICR MS. Based on differing biological turnover rates and normalized intensity values, a total of 1704 formulas were identified as candidate LDOM, SLDOM and RDOM molecules. Microbial transformation of LDOM to RDOM tended to proceed from high to low molecular weight, as well as from molecules with high to low double bond equivalent (DBE) values. Relatively higher aromaticity was observed in the formulas of RDOM molecules relative to those of LDOM molecules. FDOM components provide valuable proxy information to investigate variation in the bioavailability of DOM. These results suggest that coordinating fluorescence spectroscopy and FT-ICR MS of DOM, as conducted here, is an effective strategy to identify and characterize LDOM, SLDOM and RDOM molecules in incubation experiments emulating natural systems. The results described here provide greater insight into the metabolism of phytoplankton photosynthate by heterotrophic bacteria in marine environments. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17818]  |
| 专题 | 南海海洋研究所_中科院海洋生物资源可持续利用重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Trop Marine Bioresources & Ecol, Guangzhou, Guangdong, Peoples R China 2.Xiamen Univ, Collage Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen 361102, Fujian, Peoples R China 3.Xiamen Univ, Inst Marine Microbes & Ecospheres, Xiamen 361102, Fujian, Peoples R China 4.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 5.Xiamen Univ, Key Lab Coastal & Wetland Ecosyst, Minist Educ, Xiamen, Fujian, Peoples R China 6.Chinese Acad Sci, South China Sea Inst Oceanol, Xisha Deep Sea Marine Environm Observat & Res Stn, Sansha, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yu,Zheng, Qiang,Chen, Qi,et al. Molecular characteristics of microbially mediated transformations of Synechococcus-derived dissolved organic matter as revealed by incubation experiments[J]. ENVIRONMENTAL MICROBIOLOGY,2019,21(7):2533, 2543. |
| APA | Wang, Yu.,Zheng, Qiang.,Chen, Qi.,Cai, Ruanhong.,He, Chen.,...&Shi, Quan.(2019).Molecular characteristics of microbially mediated transformations of Synechococcus-derived dissolved organic matter as revealed by incubation experiments.ENVIRONMENTAL MICROBIOLOGY,21(7),2533. |
| MLA | Wang, Yu,et al."Molecular characteristics of microbially mediated transformations of Synechococcus-derived dissolved organic matter as revealed by incubation experiments".ENVIRONMENTAL MICROBIOLOGY 21.7(2019):2533. |
入库方式： OAI收割
来源：南海海洋研究所
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