Sulfur Isotope Fractionation Mediated by Microbial Anoxygenic Photosynthetic Sulfur Oxidation Processes and Its Geological Implications

被引：1
|
作者：
Xie Y. [1 ]
Wu G. [1 ]
Xian W. [2 ,3 ]
Li W. [3 ]
Jiang H. [1 ]
机构：
[1] State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan
[2] Marine Science and Technology College, Zhejiang Ocean University, Zhoushan
[3] State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat ⁃Sen University, Guangzhou
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 08期
关键词：
anoxygenic photosynthesis; biogeochemistry; Chloroflexota; green nonsulfur bacteria; isotope fractionation; sulfur oxidation;
D O I：
10.3799/dqkx.2022.420
中图分类号：
学科分类号：
摘要：
The isotopic preferences exhibited by microorganisms during the utilization of sulfur⁃containing materials result in sulfur isotopic fractionation in metabolites, Consequently, sulfur isotopes in the geological record can serve as indicators of microbial activity and redox conditions in the paleo ⁃ oceans and atmospheres. Conventionally, significant isotopic fractionation has been associated with microbially mediated sulfur reduction and sulfur disproportionation, while the fractionation effect caused by microbial sulfur oxidation processes has considered less evident. However, recent research has shown that one of sulfur⁃oxidizing bacteria can produce substantial sulfur isotopic fractionation, necessitating a reassessment of sulfur oxidation processes in the geological record. This paper provides a comprehensive review of sulfur isotopic fractionation effects in microbial anoxygenic photosynthetic sulfur oxidation processes and its geological implications, which includes the distribution and function of sulfur ⁃ oxidizing microorganisms and Chloroflexota, the sulfur isotopic fractionation effect of microbially mediated sulfur oxidation processes, and the geological record of sulfur isotopic fractionation studies related to microbial sulfur oxidation processes. Finally, the current status and future directions of research on sulfur isotopic fractionation mediated by microbial anoxygenic photosynthetic sulfur oxidation processes are summarized and presented. © 2023 China University of Geosciences. All rights reserved.
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页码：2837 / 2850
页数：13
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