IGSNRR OpenIR
Dominant extracellular enzymes in priming of SOM decomposition depend on temperature
Liu, Qianyuan1,2; Xu, Xingliang1; Wang, Huimin1,2,3; Blagodatskaya, Evgenia5; Kuzyakov, Yakov4
2019-06-01
Source PublicationGEODERMA
ISSN0016-7061
Volume343Pages:187-195
Corresponding AuthorXu, Xingliang(xuxingl@hotmail.com)
AbstractDecomposition 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.
KeywordSoil organic matter C-14 labeling technique Priming Temperature Extracellular enzymes
DOI10.1016/j.geoderma.2019.02.006
WOS KeywordSOIL ORGANIC-MATTER ; MICROBIAL BIOMASS ; LITTER DECOMPOSITION ; CARBON ; SENSITIVITY ; MECHANISMS ; FEEDBACKS ; RESPIRATION ; INCREASES ; QUALITY
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000463304300017
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/48109
Collection中国科学院地理科学与资源研究所
Corresponding AuthorXu, Xingliang
Affiliation1.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
Recommended Citation
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.
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