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Mineralization of amino acids and evidence of direct assimilation of organic nitrogen
Year:
1990
Authors :
Hadas, Aviva
;
.
Volume :
54
Co-Authors:
Barak, P.
Molina, J.A.E.
Hadas, A.
Clapp, C.E.
Facilitators :
From page:
769
To page:
774
(
Total pages:
6
)
Abstract:
Rival hypotheses, the mineralization-immobilization -turnover (MIT) hypothesis and the direct hypothesis, contend that deamination of soluble, low-molecular-weight nitrogenous compounds in soil is mediated by either extracellular or intracellular enzymes, respectively. To test these hypotheses, two amino acids, glycine (C/N=1.7) and leucine (C/N = 5.2), were added to an acid Hubbard loamy sand (sandy, mixed Udorthentic Haploboroll) and incubated for 7 d. Labeled 15N data, when analyzed using kinetic models reflecting either the direct or MIT hypotheses, reject the MIT hypothesis (~ = 0.01) and show evidence of direct incorporation of amino acids into the microbial biomass. -from Authors
Note:
Related Files :
amino acid
direct hypothesis
Mineralization
mineralization-immobilization- turnover hypothesis
nitrogen
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DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Language:
English
Editors' remarks:
ID:
20034
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:33
Scientific Publication
Mineralization of amino acids and evidence of direct assimilation of organic nitrogen
54
Barak, P.
Molina, J.A.E.
Hadas, A.
Clapp, C.E.
Mineralization of amino acids and evidence of direct assimilation of organic nitrogen
Rival hypotheses, the mineralization-immobilization -turnover (MIT) hypothesis and the direct hypothesis, contend that deamination of soluble, low-molecular-weight nitrogenous compounds in soil is mediated by either extracellular or intracellular enzymes, respectively. To test these hypotheses, two amino acids, glycine (C/N=1.7) and leucine (C/N = 5.2), were added to an acid Hubbard loamy sand (sandy, mixed Udorthentic Haploboroll) and incubated for 7 d. Labeled 15N data, when analyzed using kinetic models reflecting either the direct or MIT hypotheses, reject the MIT hypothesis (~ = 0.01) and show evidence of direct incorporation of amino acids into the microbial biomass. -from Authors
Scientific Publication
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