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Stable carbon isotopic composition of amino sugars in heterotrophic bacteria and phytoplankton: Implications for assessment of marine organic matter degradation

文献类型：期刊论文

作者Guo, Jinqiang1,6,8; Achterberg, Eric P.1; Shen, Yuan4,5; Yuan, Huamao3,6,7,8; Song, Jinming3,6,7,8; Liu, Jin2; Li, Xuegang3,6,7,8; Duan, Liqin3,6,7,8
刊名LIMNOLOGY AND OCEANOGRAPHY
出版日期2023-11-22
页码12
ISSN号0024-3590
DOI10.1002/lno.12468
通讯作者Yuan, Huamao(yuanhuamao@qdio.ac.cn) ; Song, Jinming(jmsong@qdio.ac.cn)
英文摘要Compound-specific isotope analysis has opened up a new realm for resolving the sources and transformation processes of marine organic matter. However, the stable carbon isotope patterns of amino sugars remain unknown. We examined delta 13C of amino sugars in marine phytoplankton and heterotrophic bacteria, and the variations in amino sugar delta 13C during 66-d planktonic organic matter degradation experiments, to investigate the metabolic sources and transformations of amino sugars by bacterial reworking. The delta 13C values of glucosamine (GlcN) and galactosamine (GalN) were comparable in heterotrophic bacteria (difference Delta delta 13CGlcN-GalN = 0.4-4.0 parts per thousand) but pronouncedly different in phytoplankton (Delta delta 13CGlcN-GalN = 4.3-16.6 parts per thousand), suggesting similar synthesis pathways of GlcN and GalN in bacteria that differed from phytoplankton. Compared to GlcN and GalN, bacteria preferentially use isotopically light organic compounds for muramic acid (MurA) synthesis. During simulated microbial degradation of organic matter, the delta 13C difference between GlcN and GalN decreased from 5.8 parts per thousand on the initial day to 1 parts per thousand at a late stage in the experiment, but the difference between GlcN and MurA remained at 5.3 parts per thousand. This difference is consistent with the pattern in cultured phytoplankton (average Delta delta 13CGlcN-GalN = 5.9 parts per thousand +/- 1.4 parts per thousand) and heterotrophic bacteria (average Delta delta 13CGlcN-MurA = 4.6 parts per thousand +/- 3.4 parts per thousand), indicating enhanced bacterial resynthesis as degradation proceeded. Based on the difference in delta 13C among GlcN, GalN, and MurA, we propose a novel index of variation in amino sugar delta 13C, representing amino sugar resynthesis, to describe the diagenetic state of organic matter. Together, these findings suggest that amino sugar delta 13C can be used as a new tool to track heterotrophic processes of marine organic matter.
WOS关键词NITROGEN ISOTOPES ; MURAMIC ACID ; FRACTIONATION ; PARTICULATE ; DELTA-C-13 ; OCEAN ; BIOSYNTHESIS ; PACIFIC ; SEA ; MONOSACCHARIDES
资助项目Fujian Provincial Central Guided Local Science and Technology Development Special Project ; China Scholarship Council (CSC) ; Deutscher Akademischer Austauschdienst (DAAD) ; National Natural Science Foundation of China[42276038] ; National Natural Science Foundation of China[42322602] ; National Natural Science Foundation of China[42106040] ; National Natural Science Foundation of China[LSKJ202204001] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Two-Hundred Talents Plan of Yantai Scholar Project Special Funding ; Fundamental Research Funds for the Central Universities of China[20720210076] ; [2022L3078]
WOS研究方向Marine & Freshwater Biology ; Oceanography
语种英语
出版者WILEY
WOS记录号WOS:001107700000001
源URL[http://ir.qdio.ac.cn/handle/337002/183975]  
专题海洋研究所_海洋生态与环境科学重点实验室
通讯作者Yuan, Huamao; Song, Jinming
作者单位1.GEOMAR Helmholtz Ctr Ocean Res Kiel, Marine Biogeochem Div, Kiel, Germany
2.Chinese Acad Sci, Inst Oceanol, Publ Technol Serv Ctr, Qingdao, Peoples R China
3.Laoshan Lab, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
4.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen, Peoples R China
5.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
7.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
8.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Jinqiang,Achterberg, Eric P.,Shen, Yuan,et al. Stable carbon isotopic composition of amino sugars in heterotrophic bacteria and phytoplankton: Implications for assessment of marine organic matter degradation[J]. LIMNOLOGY AND OCEANOGRAPHY,2023:12.
APA Guo, Jinqiang.,Achterberg, Eric P..,Shen, Yuan.,Yuan, Huamao.,Song, Jinming.,...&Duan, Liqin.(2023).Stable carbon isotopic composition of amino sugars in heterotrophic bacteria and phytoplankton: Implications for assessment of marine organic matter degradation.LIMNOLOGY AND OCEANOGRAPHY,12.
MLA Guo, Jinqiang,et al."Stable carbon isotopic composition of amino sugars in heterotrophic bacteria and phytoplankton: Implications for assessment of marine organic matter degradation".LIMNOLOGY AND OCEANOGRAPHY (2023):12.

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来源：海洋研究所

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