Coupling nickel chemical speciation and isotope ratios to decipher nickel dynamics in the Rinorea cf. bengalensis -soil
- PDF / 1,616,688 Bytes
- 19 Pages / 547.087 x 737.008 pts Page_size
- 103 Downloads / 167 Views
REGULAR ARTICLE
Coupling nickel chemical speciation and isotope ratios to decipher nickel dynamics in the Rinorea cf. bengalensis-soil system in Malaysian Borneo I. O. Zelano & C. Cloquet & A. van der Ent & G. Echevarria & R. Gley & G. Landrot & S. Pollastri & F. Fraysse & E. Montargès-Pelletier Received: 14 March 2019 / Accepted: 17 April 2020 # Springer Nature Switzerland AG 2020
Abstract Aims. Rinorea cf. bengalensis is a Ni hyperaccumulator which occurs in Sabah (Malaysia), on Borneo Island, that is able to accumulate considerable amounts of Ni and influences the Ni cycle in surface soil layers, both in terms of Ni concentration and Ni isotopic composition. In this study, the biogeochemical processes underpinning Ni isotopic Responsible Editor: Juan Barcelo. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04541-0) contains supplementary material, which is available to authorized users. I. O. Zelano : C. Cloquet CRPG, UMR 7358, CNRS-Université de Lorraine, 15 rue Notre-Dame-des-Pauvres, BP20, 54501 Vandœuvre-lès-Nancy, France I. O. Zelano (*) : R. Gley : F. Fraysse : E. Montargès-Pelletier LIEC, UMR 7360, CNRS Université de Lorraine, 15 avenue du Charmois, 54500, Vandœuvre-lès-Nancy, France e-mail: [email protected] A. van der Ent Sustainable Minerals Institute, The University of Queensland, St Lucia QLD 4072, Australia
fractionation in the soil-plant system and the mechanisms regulating Ni homeostasis in R. cf. bengalensis plants were elucidated. Methods Two specimens of R. cf. bengalensis of different ages and associated surface soils were collected from ultramafic soils in Sabah. Soil mineralogy, Ni concentrations, speciation and isotopic signatures were subsequently determined in plant and soil samples. Results Nickel in R. cf. bengalensis leaves is mainly complexed with citrate. Soil Ni available fractions have different δ60Ni values depending on the Ni bearing phases. Rinorea cf. bengalensis specimens take up lighter Ni isotopes and a pronounced isotopic fractionation within the plant is observed, especially in the young specimen. Conclusions The results suggest that the observed fractionation in the young plant can be attributable to kinetic effects (lighter isotopes move faster), which become less evident in the older specimen, as Ni is redistributed and homogenized through phloem loading and unloading processes. Keywords Ni . Ultramafic soil . Hyperaccumulator plants . Isotopic fractionation . Chemical speciation
G. Echevarria LSE, UMR 1120 INRA Université de Lorraine, 2 avenue de la Forêt de Haye, 54500 Vandœuvre-lès-Nancy, France
Introduction G. Landrot Synchrotron SOLEIL, CEA CNRS, l’Orme des Merisiers, Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France S. Pollastri CERIC – ERIC, Strada Statale 14, 34149 Trieste, Basovizza, Italy
Ultramafic rocks are mantle rocks characterized by a specific composition with low silica, high contents of mafic minerals (Fe and Mg oxides). Soils derived from the alteration of ultramafic rocks pose e
Data Loading...
