globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-016-0210-z
Scopus记录号: 2-s2.0-84963724062
论文题名:
Simulated rainfall on agricultural soil reveals enzymatic regulation of short-term nitrous oxide profiles in soil gas and emissions from the surface
作者: Zheng J.; Doskey P.V.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期:3
起始页码: 327
结束页码: 338
语种: 英语
英文关键词: Denitrification ; Enzyme activity function ; Pre-synthesized enzymes ; Soil gas
Scopus关键词: agricultural soil ; bacterium ; denitrification ; enzyme activity ; gene expression ; greenhouse gas ; laboratory method ; microbial activity ; mixing ratio ; nitrate ; nitrous oxide ; rainfall ; respiration ; soil emission ; soil gas
英文摘要: Many microbial species use nitrate to support respiration under oxygen limiting conditions via the process of denitrification, which generates the gaseous products nitric oxide (NO), nitrous oxide (N2O), and dinitrogen (N2). Denitrifying bacteria reduce NO to N2O, which is a potent greenhouse gas, to maintain intercellular concentrations below cytotoxic levels. The enzymes that reduce N2O to N2 play a crucial role in restricting N2O emissions from the surface. Laboratory studies have demonstrated that accumulation of N2O results from unbalanced rates of the sequence of denitrification reactions, which is ascribed to enzyme kinetics and sequential gene expression. However, the same enzymatic regulation of N2O accumulation in soil during short periods of anoxia has not been observed in the field. Here, we investigated the role of enzymatic regulation on the accumulation of N2O during a transition from oxic to anoxic conditions that was induced by a simulated rainfall in the field. Distinct regulation regimes for activities of pre- and de novo synthesized denitrification enzymes were observed. The activity of N2O reductase played a crucial role in regulating N2O emissions. Dynamics of N2O mixing ratios in soil gas and emissions from the surface were in excellent agreement with simulations using a one-dimensional, diffusion–reaction equation with explicit representations of denitrification enzyme kinetics. A more explicit representation of the regulatory biology of denitrification in current biogeochemical models, like the approach developed in the subject study, is a promising strategy for improving predictions of episodic emissions of N2O from soil. © 2016, Springer International Publishing Switzerland.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83392
Appears in Collections:气候减缓与适应
气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Atmospheric Sciences Program, Michigan Technological University, Houghton, MI, United States; School of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, United States; Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI, United States

Recommended Citation:
Zheng J.,Doskey P.V.. Simulated rainfall on agricultural soil reveals enzymatic regulation of short-term nitrous oxide profiles in soil gas and emissions from the surface[J]. Biogeochemistry,2016-01-01,128(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zheng J.]'s Articles
[Doskey P.V.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zheng J.]'s Articles
[Doskey P.V.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zheng J.]‘s Articles
[Doskey P.V.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.