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32 S/ 34 S isotope fractionation in plant sulphur metabolism
Author(s) -
Tcherkez Guillaume,
Tea Illa
Publication year - 2013
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.12314
Subject(s) - sulfur , isotope , sulfur metabolism , chemistry , metabolism , fractionation , isotopes of sulfur , assimilation (phonology) , radiochemistry , secondary metabolism , isotope fractionation , stable isotope ratio , environmental chemistry , biochemistry , chromatography , amino acid , biosynthesis , physics , linguistics , philosophy , organic chemistry , quantum mechanics , methionine , enzyme
SummarySulphur is a crucial microelement for plant metabolism, involved in response mechanisms to oxidative stress, C 1 metabolism, electron transfer, secondary metabolism and post‐translational peptide modifications. However, relatively little is known about sulphur transport and partitioning in plants. Although key steps of sulphur assimilation have been shown using labelling with radioactive 35 S in past decades, the use of a natural tracer, allowing the examination of metabolic commitments and mass balance, is desirable. Sulphur stable isotopes ( 32 S and 34 S ) have been proven to be useful for the investigation of the origin of sulphur atoms in geochemistry and for the detection of the origin of sulphur atoms. Nevertheless, their use for the study of primary sulphur metabolism has been impeded by our lack of knowledge of 32 S / 34 S isotope fractionations and convenient methods for δ 34 S analyses. Here, we review documented 32 S / 34 S isotope fractionations that may apply to sulphur metabolism, and explain how they should yield disparities amongst sulphur‐containing plant compounds.