干旱区生态环境知识资源中心(Arid): Distribution of branched glycerol dialkyl glycerol tetraethers in soils on the Northeastern Qinghai-Tibetan Plateau and possible production by nitrite-reducing bacteria

Arid

	Distribution of branched glycerol dialkyl glycerol tetraethers in soils on the Northeastern Qinghai-Tibetan Plateau and possible production by nitrite-reducing bacteria
	Sun Chijun; Zhang Chuanlun; Li Fuyan; Wang Huanye; Liu Weiguo
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2016
卷号	59 期号:9 页码:1834-1846
英文摘要	Branched glycerol dialkyl glycerol tetraethers (bGDGTs) are ubiquitous and abundant in soils, but their sources remain elusive. Recent studies demonstrate that the distributions of bGDGTs are sensitive to various environmental factors. In an effort to understand how and to what extent soil moisture (expressed as soil water content (SWC) or mean annual precipitation (MAP), pH and temperature may impact the distribution of bGDGTs, and to shed more light on the biological sources of bGDGTs in cold and arid regions, we investigated the distribution of bGDGTs as well as bacterial 16S rRNA gene and functional genes involved in the N cycle (including amoA, nirS and nirK) in 41 surface soil samples from around Lake Qinghai and east of Qaidam Basin on the Northeastern Qinghai-Tibetan Plateau. We found that lower soil moisture reduced the fractional concentrations of cyclic bGDGTs and thus the cyclisation ratio of branched tetraethers (CBT) index correlated negatively with SWC and MAP, suggesting that soil moisture is an important factor controlling bGDGT distributions in soils in this arid and semi-arid region. Two subgroups of bGDGTs were assigned on the basis of cluster analysis, and bGDGT indices behaved differently in the two groups, hinting at different biosynthetic mechanisms for bGDGTs under different environmental conditions. Real time PCR results showed that nirS and nirK genes correlated significantly with the concentration of bGDGTs, suggesting that the nirS- or nirK-encoding bacteria involved in denitrification might potentially be an additional biological source for soil bGDGTs (besides Acidobacteria). Moreover, our results also support the application of new indices based on 5-methyl bGDGTs and 6-methyl bGDGTs in reconstructing past temperature and pH variations in this region.
英文关键词	bGDGTs Soil water content CBT nirS- or nirK-encoding bacteria Real time PCR Cluster analysis
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5797355
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335703
作者单位	Sun Chijun, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Zhang Chuanlun, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Li Fuyan, Tongji University, State Key Laboratory of Marine Geology, Shanghai 200092, China.; Wang Huanye, Institute of Earth Environment, Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Liu Weiguo, Institute of Earth Environment, Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.
推荐引用方式 GB/T 7714	Sun Chijun,Zhang Chuanlun,Li Fuyan,et al. Distribution of branched glycerol dialkyl glycerol tetraethers in soils on the Northeastern Qinghai-Tibetan Plateau and possible production by nitrite-reducing bacteria[J],2016,59(9):1834-1846.
APA	Sun Chijun,Zhang Chuanlun,Li Fuyan,Wang Huanye,&Liu Weiguo.(2016).Distribution of branched glycerol dialkyl glycerol tetraethers in soils on the Northeastern Qinghai-Tibetan Plateau and possible production by nitrite-reducing bacteria.Science China. Earth Sciences,59(9),1834-1846.
MLA	Sun Chijun,et al."Distribution of branched glycerol dialkyl glycerol tetraethers in soils on the Northeastern Qinghai-Tibetan Plateau and possible production by nitrite-reducing bacteria".Science China. Earth Sciences 59.9(2016):1834-1846.