气候变化领域集成服务门户(CCPortal): Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution

CCPortal

DOI	10.1111/gbi.12328
	Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution
	Goff J.; Terry L.; Mal J.; Schilling K.; Pallud C.; Yee N.
发表日期	2019
ISSN	14724677
起始页码	320
结束页码	329
卷号	17 期号:3
英文摘要	The dissolution of elemental selenium [Se(0)] during chemical weathering is an important step in the global selenium cycle. While microorganisms have been shown to play a key role in selenium dissolution in soils, the mechanisms of microbial selenium solubilization are poorly understood. In this study, we isolated a Bacillus species, designated as strain JG17, that exhibited the ability to dissolve Se(0) under oxic conditions and neutral pH. Growth of JG17 in a defined medium resulted in the production and accumulation of extracellular compounds that mediated Se(0) dissolution. Analysis of the spent medium revealed the presence of extracellular sulfite, sulfide, and thiosulfate. Abiotic Se(0) dissolution experiments with concentrations of sulfite, sulfide, and thiosulfate relevant to our system showed similar extents of selenium solubilization as the spent medium. Together, these results indicate that the solubilization of Se(0) by JG17 occurs via the release of extracellular inorganic sulfur compounds followed by chemical dissolution of Se(0) by the reactive sulfur metabolites. Our findings suggest that the production of reactive sulfur metabolites by soil microorganisms and the formation of soluble selenosulfur complexes can promote selenium mobilization during chemical weathering. © 2018 John Wiley & Sons Ltd
关键词	chemical weathering dissolution metabolite mobilization oxic conditions pH selenium soil chemistry soil microorganism solubilization thiosulfate selenium sulfur Bacillus chemistry metabolism microbiology soil solubility Bacillus Selenium Soil Soil Microbiology Solubility Sulfur
语种	英语
来源机构	Geobiology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133236
推荐引用方式 GB/T 7714	Goff J.,Terry L.,Mal J.,et al. Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution[J]. Geobiology,2019,17(3).
APA	Goff J.,Terry L.,Mal J.,Schilling K.,Pallud C.,&Yee N..(2019).Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution.,17(3).
MLA	Goff J.,et al."Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution".17.3(2019).