Iron isotope fingerprints of redox and biogeochemical cycling in the soil-water-rice plant system of a paddy field

Garnier, Jérémie; Garnier, Jean‐Marie; Vieira, C. L.; Akerman, Alisson; Chmeleff, Jérôme; Ruiz, Roman; Poitrasson, Franck

doi:10.1016/j.scitotenv.2016.08.202

Cited by 40 publications

(62 citation statements)

References 51 publications

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“…To remove soil particles, weak salt solutions, ultrapure, and ice-cold water (18.2 MΩ.cm) are used ( Tang et al, 2016 ). Salt solutions or weak acids can be further used to extract the apoplastic root pool prior to isotope ratio analysis (e.g., Tang et al, 2016 ; Garnier et al, 2017 ). However, both the washing procedure and the extractant used may significantly impact the isotope ratios of the different root pools.…”

Section: Methods For Isotope Analyses Of Plantsmentioning

confidence: 99%

“…Plants preferentially take up heavy Fe from phytoavailable soil pools (Δ 56 Fe plant-phytoavailable −0.11 to +1.36‰, Garnier et al, 2017 ; Wu et al, 2019 ; Liu et al, 2019 ; Chen et al, 2021 ; Figure 6 ). Plant Fe acquisition from soils includes the dissolution of Fe(III) minerals and root membrane transport, but the Fe acquisition strategy differs among plant species ( Connorton et al, 2017 ).…”

Section: Isotope Fractionation In Plantsmentioning

confidence: 99%

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Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

et al. 2022

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This work critically reviews stable isotope fractionation of essential (B, Mg, K, Ca, Fe, Ni, Cu, Zn, Mo), beneficial (Si), and non-essential (Cd, Tl) metals and metalloids in plants. The review (i) provides basic principles and methodologies for non-traditional isotope analyses, (ii) compiles isotope fractionation for uptake and translocation for each element and connects them to physiological processes, and (iii) interlinks knowledge from different elements to identify common and contrasting drivers of isotope fractionation. Different biological and physico-chemical processes drive isotope fractionation in plants. During uptake, Ca and Mg fractionate through root apoplast adsorption, Si through diffusion during membrane passage, Fe and Cu through reduction prior to membrane transport in strategy I plants, and Zn, Cu, and Cd through membrane transport. During translocation and utilization, isotopes fractionate through precipitation into insoluble forms, such as phytoliths (Si) or oxalate (Ca), structural binding to cell walls (Ca), and membrane transport and binding to soluble organic ligands (Zn, Cd). These processes can lead to similar (Cu, Fe) and opposing (Ca vs. Mg, Zn vs. Cd) isotope fractionation patterns of chemically similar elements in plants. Isotope fractionation in plants is influenced by biotic factors, such as phenological stages and plant genetics, as well as abiotic factors. Different nutrient supply induced shifts in isotope fractionation patterns for Mg, Cu, and Zn, suggesting that isotope process tracing can be used as a tool to detect and quantify different uptake pathways in response to abiotic stresses. However, the interpretation of isotope fractionation in plants is challenging because many isotope fractionation factors associated with specific processes are unknown and experiments are often exploratory. To overcome these limitations, fundamental geochemical research should expand the database of isotope fractionation factors and disentangle kinetic and equilibrium fractionation. In addition, plant growth studies should further shift toward hypothesis-driven experiments, for example, by integrating contrasting nutrient supplies, using established model plants, genetic approaches, and by combining isotope analyses with complementary speciation techniques. To fully exploit the potential of isotope process tracing in plants, the interdisciplinary expertise of plant and isotope geochemical scientists is required.

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Section: Methods For Isotope Analyses Of Plantsmentioning

confidence: 99%

Section: Isotope Fractionation In Plantsmentioning

confidence: 99%

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

et al. 2022

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“…Iron plaques formation is a critical process to control metal uptake via root. They are formed during oxidation of Fe 2+ in anoxic, waterlogged conditions at the root surface by O 2 diffusing through the aerenchym Aucour et al, 2017;Garnier et al, 2017). In Sepetiba Bay, a previous study of seedlings of L. racemosa showed that almost 90% of Zn in the roots are associated with iron plaque and only a minor fraction is stored in the root tissues .…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Zinc isotopes as tracers of anthropogenic sources and biogeochemical processes in contaminated mangroves

Araújo

Machado

Weiß

et al. 2018

Applied Geochemistry

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Recent work has shown that variations in zinc (Zn) isotope ratios enable us to identify contamination sources in the terrestrial environment and uptake processes in higher plants. Here in this study, we demonstrate that this also holds true for mangrove forests, which play an important role in the biogeochemical cycling of metals in tropical coastal ecosystems and that are seriously threatened by anthropogenic pollution. To this end, we determined zinc concentration and isotope composition (expressed using the δ66Zn notation relative to the JMC 3-0749-L standard) in sediments and tree leaves collected from a mangrove close to Rio de Janeiro in Brazil. The δ66ZnJMC values of sediments vary between +0.36 and + 0.84‰ and fall on a mixing line between detrital terrestrial sources (characterized with δ66ZnJMC = +0.28 ± 0.12‰, 2σ) and metallurgical ore sources (δ66ZnJMC = +0.86‰ ±0.15‰, 2σ). Leaves of Laguncularia racemose, in contrast, showed δ66ZnJMC values ranging between +0.08 and + 0.23‰, suggesting that processes including uptake, translocation and bioavailability in the rhizosphere control the isotope composition of zinc in the mangrove plant. Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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“…occurring in the complex soil system (Garnier et al 2017, Thompson et al, 2007. In contrast, most soils that developed under oxic conditions only display a small variation in bulk solid phase δ 56 Fe values of 0.08‰ (Podzols show variations in δ 56 Fe values of up to 0.6‰; Poitrasson et al, 2008;Wiederhold et al, 2007b).…”

Section: Fe Isotopesmentioning

confidence: 99%

Isotopic variation of dissolved and colloidal iron and copper in a carbonatic floodplain soil after experimental flooding

et al. 2017

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Many floodplain soils worldwide are contaminated by present and past industrial and mining activities. During flooding redox potential decreases, triggering the release of dissolved and colloidal metals. We used an anaerobic microcosm incubation to simulate flooding of a carbonate-rich floodplain soil for 40 days. Soil solution samples were extracted to determine the release of dissolved (<0.02 µm) and colloidal fractions (0.02-10 µm). We analyzed stable isotope ratios of colloidal and dissolved Fe and Cu representing two groups of metals with different release behavior; release of Fe was steadily increasing, while Cu peaked sharply after flooding and decreased afterwards. The temporal trend of δ 56 Fe values of total Fe in

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Iron isotope fingerprints of redox and biogeochemical cycling in the soil-water-rice plant system of a paddy field

Cited by 40 publications

References 51 publications

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

Zinc isotopes as tracers of anthropogenic sources and biogeochemical processes in contaminated mangroves

Isotopic variation of dissolved and colloidal iron and copper in a carbonatic floodplain soil after experimental flooding

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