Dominant extracellular enzymes in priming of SOM decomposition depend on temperature

doi:10.1016/j.geoderma.2019.02.006

	Dominant extracellular enzymes in priming of SOM decomposition depend on temperature
	Liu, Qianyuan 1,2; Xu, Xingliang 1; Wang, Huimin 1,2,3; Blagodatskaya, Evgenia 5; Kuzyakov, Yakov 4
刊名	GEODERMA
	2019-06-01
卷号	343 页码:187-195
关键词	Soil organic matter C-14 labeling technique Priming Temperature Extracellular enzymes
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2019.02.006
通讯作者	Xu, Xingliang(xuxingl@hotmail.com)
英文摘要	Decomposition of soil organic matter (SOM) is operated by microbial extracellular enzymes and is dependent on temperature. It remains unclear how input of labile organics interacts with temperature on SOM decomposition. Soil samples collected from a temperate forest were incubated for 3 months to quantify SOM decomposition and its priming induced by input of C-14-labelled glucose at five temperatures (from 3 to 31 degrees C with an interval of 7 degrees C). The activities of eight extracellular enzymes were measured four times during the incubation. Increasing temperature accelerated SOM decomposition with a temperature sensitivity (Q(10)) value ranging from 1.3 to 4.4. Response of priming to temperature was mediated by the activity and variety of extracellular enzymes temporally: (1) priming increased with increasing temperature at the initial stage; (2) subsequently, priming at lower temperature gradually exceeded those at higher temperature; and (3) finally, priming at high temperature was higher than at low temperatures. At higher temperatures (17-31 degrees C), N-acquiring enzymes (leucine amino peptidase and N-acetyl-beta-o-glucosaminidase) dominated at the early stage of priming, but C-acquiring enzymes (beta-glucosidase and xylanase) dominated at later stages. Priming exhibited a hysteresis at low temperatures (3-17 degrees C) with C-acquiring enzyme (beta-galactosidase) dominating at the initial stage, C-and P-acquiring enzymes (alpha-glucosidase and phosphomonoesterase) at the middle stage, and C-acquiring enzymes (beta-galactosidase and xylanase) at the later stage. Consequently, microbial extracellular enzymes were produced in terms of nutrient availability over time depended on temperature. Such acclimation of microbial extracellular enzymes to temperature and nutrient availability should be considered to predict responses of C cycling to global change.
资助项目	National Natural Science Foundation of China[41877089] ; National Natural Science Foundation of China[31470560] ; National Natural Science Foundation of China[41671253] ; German Research Foundation (DFG) within the Priority Programme 1372 'Tibetan Plateau: Formation - Climate - Ecosystems (TiP)' ; Youth Innovation Research Team Project[LENOM2016Q0004] ; CAS President's International Fellowship for Visiting Scientists[2018VCB0012]
WOS关键词	SOIL ORGANIC-MATTER ; MICROBIAL BIOMASS ; LITTER DECOMPOSITION ; CARBON ; SENSITIVITY ; MECHANISMS ; FEEDBACKS ; RESPIRATION ; INCREASES ; QUALITY
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000463304300017
资助机构	National Natural Science Foundation of China ; German Research Foundation (DFG) within the Priority Programme 1372 'Tibetan Plateau: Formation - Climate - Ecosystems (TiP)' ; Youth Innovation Research Team Project ; CAS President's International Fellowship for Visiting Scientists
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/48108]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Xingliang
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Inst Geog Sci & Nat Resources, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 3.Jiangxi Key Lab Ecosyst Proc & Informat, Jian 343725, Jiangxi, Peoples R China 4.Univ Gottingen, Dept Agr Soil Sci, Dept Soil Sci Temperate Ecosyst, Gottingen, Germany 5.RUDN Univ, Agrotechnol Inst, Moscow, Russia
推荐引用方式 GB/T 7714	Liu, Qianyuan,Xu, Xingliang,Wang, Huimin,et al. Dominant extracellular enzymes in priming of SOM decomposition depend on temperature[J]. GEODERMA,2019,343:187-195.
APA	Liu, Qianyuan,Xu, Xingliang,Wang, Huimin,Blagodatskaya, Evgenia,&Kuzyakov, Yakov.(2019).Dominant extracellular enzymes in priming of SOM decomposition depend on temperature.GEODERMA,343,187-195.
MLA	Liu, Qianyuan,et al."Dominant extracellular enzymes in priming of SOM decomposition depend on temperature".GEODERMA 343(2019):187-195.