DOI: 10.1007/s10533-015-0138-8
Scopus记录号: 2-s2.0-84944146186
论文题名: NanoSIMS investigation of glycine-derived C and N retention with soil organo-mineral associations
作者: Hatton P.-J. ; Remusat L. ; Zeller B. ; Brewer E.A. ; Derrien D.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 125, 期: 3 起始页码: 303
结束页码: 313
语种: 英语
英文关键词: Biotic
; Density
; Glycine
; NanoSIMS
; Retention
; Soil
英文摘要: While microbial-mineral-organic matter interactions are key features controlling the fates of low molecular-weight compounds in soils, direct investigations of how they control their fine-scale spatial distribution are scant. Here, we addressed how microbial transformations affect the retention of 13C/15N-labeled glycine in a forest topsoil 8 h after application. We assessed the contribution of soil microorganisms to glycine-derived 13C and 15N retention using γ-irradiated and non-irradiated soils. We tracked down the glycine-derived 13C and 15N at the surface of particles randomly isolated from soil density fractions using nano-scale secondary ions mass spectrometry (NanoSIMS) imaging. Eight hours after addition, 7 % of the glycine-derived 13C and 15N initially applied was recovered among soil density fractions, mainly via the activity of soil microorganisms (>85 % of total retention). Glycine-derived 13C and 15N distribution among density fractions was correlated with that of soil organic matter (SOM) determined by NanoSIMS (R ≥ 0.85), suggesting that the spatial patterns of the mineral-attached SOM controls the spatial distribution of the glycine-derived 13C and 15N. NanoSIMS images showed largely decoupled glycine-derived 13C and 15N spots preferentially attached to aggregated particles. We speculate that the glycine-derived 13C was principally found within or in the vicinity of microbial cells, whereas the glycine-derived 15N was mostly found as NH4+ and/or exoenzymes spread across soil surfaces. The C:N ratios determined by NanoSIMS suggest that local chemical properties of mineral-attached SOM drive glycine-derived 15N attachment, with the preferential attachment to mineral-attached SOM rich in N (C:N ratios mostly <16). Few exceptions were found in presence of Al and Fe (hydr)oxides (>2.65 g cm−3). © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83473
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: INRA-Nancy, Biogéochimie des Écosystèmes Forestiers, UR1138, Champenoux, France; Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie. UMR CNRS 7590, Sorbonne Universités, Muséum National d’Histoire Naturelle, UPMC, IRD, 61 rue Buffon, Paris, France; Department of Crop and Soil Science, Oregon State University, Corvallis, OR, United States; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, United States
Recommended Citation:
Hatton P.-J.,Remusat L.,Zeller B.,et al. NanoSIMS investigation of glycine-derived C and N retention with soil organo-mineral associations[J]. Biogeochemistry,2015-01-01,125(3)