干旱区生态环境知识资源中心(Arid): Soil Microbes Transform Inorganic Carbon Into Organic Carbon by Dark Fixation Pathways in Desert Soil

Arid

DOI	10.1029/2020JG006047
	Soil Microbes Transform Inorganic Carbon Into Organic Carbon by Dark Fixation Pathways in Desert Soil
	Liu, Zhen; Sun, Yanfei; Zhang, Yuqing; Feng, Wei; Lai, Zongrui; Qin, Shugao
通讯作者	Zhang, YQ (corresponding author), Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China. ; Zhang, YQ (corresponding author), Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2021
卷号	126 期号:5
英文摘要	Soil inorganic carbon (SIC) represents the main soil carbon pool in drylands with a high geologic residence time for carbon sequestration. Recent studies have shown that SIC is not stable as previously supposed, and can be employed by certain microbes and transformed into organics in soils; however, this transformation remains largely unexplored. We performed in situ C-13 tracing in desert bulk soil and employed metagenomics to predict the microbial metabolic processes associated with carbon transformation. The tracing data showed that the C-13 signature profile in soil organic carbon (SOC) originated from SIC with a carbon transformation content of 6.881 mg m(-2) during the feeding periods, corresponding to a rate of 3.276 mu g kg(-1) d(-1). Metagenomic analysis identified genes encoding enzymes related to microbial CO2 and HCO3- fixation, accounting for 0.448% (based on Kyoto Encyclopedia of Genes and Genomes database) and 0.668% (based on Evolutionary genealogy of genes: Non-supervised Orthologous Groups database) of all ascertained genes. Soil microbes, from a broad taxonomic range, harboring these genes mainly contributed toward chemoautotrophic and heterotrophic carbon fixation. Our results demonstrated that the microbes employed the chemoautotrophic and heterotrophic pathways, namely, dark microbial pathways, for SIC transformation into SOC. Although the amount of SOC derived from the dark microbial fixation process was not assessed, the present study highlights a neglected carbon transformation process mediated by soil microbes in drylands and provides insights into carbon transformation of SIC to SOC in dryland soil.
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000655232300001
WOS关键词	CO2 FIXATION ; MICROORGANISMS ; SEQUESTRATION ; ASSIMILATION ; MECHANISMS ; ABUNDANCE ; DYNAMICS ; PATTERNS ; MATTER ; ENERGY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	中国科学院地理科学与资源研究所 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350840
作者单位	[Liu, Zhen; Sun, Yanfei; Zhang, Yuqing; Feng, Wei; Lai, Zongrui; Qin, Shugao] Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing, Peoples R China; [Liu, Zhen] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Yellow River Delta Modern Agr Engn Lab, Beijing, Peoples R China; [Zhang, Yuqing; Feng, Wei; Lai, Zongrui] Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing, Peoples R China; [Qin, Shugao] Beijing Forestry Univ, Engn Res Ctr Forestry Ecol Engn, Minist Educ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhen,Sun, Yanfei,Zhang, Yuqing,et al. Soil Microbes Transform Inorganic Carbon Into Organic Carbon by Dark Fixation Pathways in Desert Soil[J]. 中国科学院地理科学与资源研究所, 北京林业大学,2021,126(5).
APA	Liu, Zhen,Sun, Yanfei,Zhang, Yuqing,Feng, Wei,Lai, Zongrui,&Qin, Shugao.(2021).Soil Microbes Transform Inorganic Carbon Into Organic Carbon by Dark Fixation Pathways in Desert Soil.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,126(5).
MLA	Liu, Zhen,et al."Soil Microbes Transform Inorganic Carbon Into Organic Carbon by Dark Fixation Pathways in Desert Soil".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126.5(2021).