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Substrate control of sulphur utilisation and microbial stoichiometry in soil: Results of <sup>13</sup>C, <sup>15</sup>N, <sup>14</sup>C, and <sup>35</sup>S quad labelling

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dc.contributor.author Ma Q.
dc.contributor.author Kuzyakov Y.
dc.contributor.author Pan W.
dc.contributor.author Tang S.
dc.contributor.author Chadwick D.R.
dc.contributor.author Wen Y.
dc.contributor.author Hill P.W.
dc.contributor.author Macdonald A.
dc.contributor.author Ge T.
dc.contributor.author Si L.
dc.contributor.author Wu L.
dc.contributor.author Jones D.L.
dc.date.accessioned 2022-02-09T20:40:47Z
dc.date.available 2022-02-09T20:40:47Z
dc.date.issued 2021
dc.identifier.issn 1751-7362
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/169631
dc.description.abstract Global plant sulphur (S) deficiency is increasing because of a reduction in sulphate-based fertiliser application combined with continuous S withdrawal during harvest. Here, we applied 13C, 15N, 14C, and 35S quad labelling of the S-containing amino acids cysteine (Cys) and methionine (Met) to understand S cycling and microbial S transformations in the soil. The soil microorganisms absorbed the applied Cys and Met within minutes and released SO42− within hours. The SO42− was reutilised by the MB within days. The initial microbial utilisation and SO42− release were determined by amino acid structure. Met released 2.5-fold less SO42− than Cys. The microbial biomass retained comparatively more C and S from Met than Cys. The microorganisms decomposed Cys to pyruvate and H2S whereas they converted Met to α-ketobutyrate and S-CH3. The microbial stoichiometries of C, N, and S derived from Cys and Met were balanced after 4 d by Cys-derived SO42− uptake and Met-derived CO2 release. The microbial C:N:S ratio dynamics showed rapid C utilisation and loss, stable N levels, and S accumulation. Thus, short-term organic S utilisation by soil microorganisms is determined by amino acid structure whilst long-term organic S utilisation by soil microorganisms is determined by microbially controlled stoichiometry.
dc.relation.ispartofseries ISME Journal
dc.title Substrate control of sulphur utilisation and microbial stoichiometry in soil: Results of <sup>13</sup>C, <sup>15</sup>N, <sup>14</sup>C, and <sup>35</sup>S quad labelling
dc.type Article
dc.relation.ispartofseries-issue 11
dc.relation.ispartofseries-volume 15
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 3148
dc.source.id SCOPUS17517362-2021-15-11-SID85105793526


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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