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Letter

An incorrect wetness-based correction method for deuterium offset

View ORCID ProfileYing Zhao
  1. aCollege of Resources and Environmental Engineering, Ludong University, Yantai, Shandong 264025, China

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PNAS April 13, 2021 118 (15) e2026641118; https://doi.org/10.1073/pnas.2026641118
Ying Zhao
aCollege of Resources and Environmental Engineering, Ludong University, Yantai, Shandong 264025, China
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  • For correspondence: yzhaosoils@gmail.com
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Isotope-based plant–soil water tracing assumes that the isotope signal in the plant xylem does not fractionate (1). However, this assumption has been questioned increasingly in recent years with numerous reports for different plants of deuterium depletion in xylem water, particularly for halophyte and xerophytes (2). Chen et al. (3) go beyond what others have done to date and show how organics linked to the water cryogenic extraction from stem material result in a dynamic exchange between organically bound deuterium and liquid water. They further establish a correction method to challenge previous conclusions of …

↵1Email: yzhaosoils{at}gmail.com.

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References

  1. ↵
    1. T. E. Dawson,
    2. J. R. Ehleringer
    , Streamside trees that do not use stream water. Nature 350, 335–337 (1991).
    OpenUrlCrossRef
  2. ↵
    1. L. Zhao et al
    ., Significant difference in hydrogen isotope composition between xylem and tissue water in Populus euphratica. Plant Cell Environ. 39, 1848–1857 (2016).
    OpenUrl
  3. ↵
    1. Y. Chen et al
    ., Stem water cryogenic extraction biases estimation in deuterium isotope composition of plant source water. Proc. Natl. Acad. Sci. U.S.A. 117, 33345–33350 (2020).
    OpenUrlAbstract/FREE Full Text
  4. ↵
    1. J. Evaristo,
    2. S. Jasechko,
    3. J. J. McDonnell
    , Global separation of plant transpiration from groundwater and streamflow. Nature 525, 91–94 (2015).
    OpenUrl

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An incorrect wetness-based correction method for deuterium offset
Ying Zhao
Proceedings of the National Academy of Sciences Apr 2021, 118 (15) e2026641118; DOI: 10.1073/pnas.2026641118

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An incorrect wetness-based correction method for deuterium offset
Ying Zhao
Proceedings of the National Academy of Sciences Apr 2021, 118 (15) e2026641118; DOI: 10.1073/pnas.2026641118
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  • Stem water cryogenic extraction biases estimation in deuterium isotope composition of plant source water - December 14, 2020
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