Trace elements distribution in tropical tree rings through high-resolution imaging using LA-ICP-MS analysis.

Autor: Amais RS; Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil. Electronic address: renata_amais@yahoo.com.br., Moreau PS; Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil., Francischini DS; Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil., Magnusson R; Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil., Locosselli GM; Institute of Botany, Avenida Miguel Stefano, 04301-902, São Paulo, SP, Brazil., Godoy-Veiga M; University of São Paulo, Institute of Biosciences, Department of Botany, Rua do Matão, 277, São Paulo, SP, 05508-090, Brazil., Ceccantini G; University of São Paulo, Institute of Biosciences, Department of Botany, Rua do Matão, 277, São Paulo, SP, 05508-090, Brazil., Ortega Rodriguez DR; University of São Paulo, Luiz de Queiroz College of Agriculture, Department of Forest Sciences, Piracicaba, Brazil., Tomazello-Filho M; University of São Paulo, Luiz de Queiroz College of Agriculture, Department of Forest Sciences, Piracicaba, Brazil., Arruda MAZ; Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil.
Jazyk: angličtina
Zdroj: Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) [J Trace Elem Med Biol] 2021 Dec; Vol. 68, pp. 126872. Date of Electronic Publication: 2021 Oct 06.
DOI: 10.1016/j.jtemb.2021.126872
Abstrakt: Background: The distribution of trace elements in tree rings although poorly known may be useful to better understand environmental changes, pollution trends, long-term droughts, forest dieback processes, and biology of trees.
Method: Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is used for imaging micronutrients and potentially toxic elements distribution, allowing the investigation of trace elements at high spatial resolution within the tree rings. To ensure a more efficient determination of micronutrients and potentially toxic elements, LA-ICP-MS instrumental conditions were optimized and carbon, a major element in wood, is used as an internal standard during analysis to correct for random fluctuations.
Results: Spatial distributions maps of Ba, Cu, Fe, Mn, Ni, and Pb in growth layers of six tropical tree species were built-up using the LA-iMageS software, namely: Amburana cearensis (Fabaceae), Cedrela fissilis (Meliaceae), Hymenaea courbaril (Fabaceae), Maclura tinctoria (Moraceae), Parapiptadenia zehntneri (Fabaceae), Peltogyne paniculata (Fabaceae). A correlation between the trace element composition and different cell types (parenchyma, fiber, and vessel) was distinctly observed. It was observed a general pattern of Ba, Cu, Ni, Mn, and Pb accumulation mainly in the axial parenchyma and vessels. But the elemental composition of xylem cells is strongly species dependent. The multivariate analysis also points to a distinct accumulation of minerals between heartwood and sapwood in the same species.
Conclusions: Imaging both essential and deleterious element distributions in the tree rings may improve visualization and can effectively contribute to understanding the lifetime metabolism of trees and evaluating the effects of environmental changes related to climatic seasonality, pollution, and future paleoclimate reconstructions.
(Copyright © 2021 Elsevier GmbH. All rights reserved.)
Databáze: MEDLINE
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