globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-015-0130-3
Scopus记录号: 2-s2.0-84944167508
论文题名:
Organic nitrogen uptake by plants: reevaluation by position-specific labeling of amino acids: Reevaluation of organic N uptake by plants by position-specific labeling
作者: Moran-Zuloaga D.; Dippold M.; Glaser B.; Kuzyakov Y.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 125, 期:3
起始页码: 359
结束页码: 374
语种: 英语
英文关键词: Alanine ; Chicory ; Lupine ; Maize ; Organic N uptake ; Position-specific labeling
Scopus关键词: amino acid ; herb ; legume ; maize ; molecular analysis ; nutrient uptake ; organic nitrogen ; perennial plant ; quantitative analysis ; rhizosphere ; soil microorganism ; Cichorium intybus ; Lupinus albus ; Zea mays
英文摘要: Current studies suggest that many plants are able to take up not only inorganic nitrogen (N) but also organic N. We used the novel tool of position-specific isotope labeling to improve the quantification of intact amino acid uptake and to deepen our understanding of the processes occurring at the root-soil-microorganism interface. Position-specific 14C and 15N labeled alanine enabled us to trace the uptake of C from individual molecule positions by Zea mays, Lupinus albus and Cichorium intybus. Uniformly 14C labeled alanine and acetate and inorganic 15NH4+ and 15NO3− were applied as controls. Equal uptake of uniformly 14C labeled alanine and acetate showed that plant uptake of low molecular weight organic substances (LMWOS) is independent of N in the molecule. 14C uptake from individual molecule positions of alanine strongly differed: this confirmed that soil microorganisms cleaved alanine within 6 h into transformation products, which were then taken up by the plants. Microbial utilization strongly outcompeted the plant uptake of LMWOS in agricultural soils. This study revealed that position-specific labeling is an innovative tool that enables separation of the intact uptake from the uptake of molecule fragments and improves the understanding of competing processes for LMWOS utilization in the rhizosphere. © 2015, Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83479
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: Department of Agroecosystem Research, BayCEER, University of Bayreuth, Bayreuth, Germany; Departamento de Mecánica y Ciencias de la Producción, Escuela Superior Politécnica del Litoral, Guayaquil, Ecuador; Department of Agricultural Soil Science, Georg-August-University Goettingen, Göttingen, Germany; Department of Soil Biogeochemistry, Institute of Agricultural and Nutritional Science, Martin-Luther University Halle-Wittenberg, Halle, Germany; Department of Soil Science of Temperate Ecosystems, Georg-August University Goettingen, Göttingen, Germany

Recommended Citation:
Moran-Zuloaga D.,Dippold M.,Glaser B.,et al. Organic nitrogen uptake by plants: reevaluation by position-specific labeling of amino acids: Reevaluation of organic N uptake by plants by position-specific labeling[J]. Biogeochemistry,2015-01-01,125(3)
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