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Silicon alleviates Cd stress of wheat seedlings (Triticum turgidum L. cv. Claudio) grown in hydroponics.
Environ Sci Pollut Res Int. 2016 Jan; 23(2):1414-27.ES

Abstract

We investigated the potential role of silicon in improving tolerance and decreasing cadmium (Cd) toxicity in durum wheat (Triticum turgidum L. durum) either through a reduced Cd uptake or exclusion/sequestration in non-metabolic tissues. For this, plants were grown in hydroponic conditions for 10 days either in presence or absence of 1 mM Si and for 11 additional days in various Cd concentrations (0, 0.5, 5.0 and 50 μM). After harvesting, morphological and physiological parameters as well as elemental concentrations were recorded. Cadmium caused reduction in growth parameters, photosynthetic pigments and mineral nutrient concentrations both in shoots and roots. Shoot and root contents of malate, citrate and aconitate increased, while contents of phosphate, nitrate and sulphate decreased with increasing Cd concentrations in plants. Addition of Si to the nutrient solution mitigated these adverse effects: Cd concentration in shoots decreased while concentration of Cd adsorbed at the root cell apoplasmic level increased together with Zn uptake by roots. Overall, total Cd uptake decreased in presence of Si. There was no co-localisation of Cd and Si either at the shoot or at the root levels. No Cd was detected in leaf phytoliths. In roots, Cd was mainly detected in the cortical parenchyma and Si at the endodermis level, while analysis of the outer thin root surface of the plants grown in the 50 μM Cd + 1 mM Si treatment highlighted non-homogeneous Cd and Si enrichments. These data strongly suggest the existence of a root localised protection mechanism consisting in armoring the root surface by Si- and Cd-bearing compounds and in limiting root-shoot translocation.

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Authors+Show Affiliations

Rizwan M
Department of Environmental Sciences and Engineering, Government College University, Faisalabad, 38000, Pakistan. Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545, Aix en Provence, France.
Meunier JD
Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545, Aix en Provence, France.
Davidian JC
Biochimie & Physiologie Moléculaire des Plantes, UMR CNRS-INRA-Université Montpellier II-Montpellier SupAgro, Place Viala, 34060, Montpellier, Cedex 2, France.
Pokrovsky OS
Geoscience and Environment Toulouse (GET), UMR 5563 CNRS, 14 Avenue Edouard Belin, 31400, Toulouse, France. BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russia.
Bovet N
Nano-Science Center, Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark.
Keller C
Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545, Aix en Provence, France. keller@cerege.fr.

MeSH

CadmiumHydroponicsPhotosynthesisPlant LeavesPlant RootsSeedlingsSiliconTriticum

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26370813

Citation

Rizwan, M, et al. "Silicon Alleviates Cd Stress of Wheat Seedlings (Triticum Turgidum L. Cv. Claudio) Grown in Hydroponics." Environmental Science and Pollution Research International, vol. 23, no. 2, 2016, pp. 1414-27.
Rizwan M, Meunier JD, Davidian JC, et al. Silicon alleviates Cd stress of wheat seedlings (Triticum turgidum L. cv. Claudio) grown in hydroponics. Environ Sci Pollut Res Int. 2016;23(2):1414-27.
Rizwan, M., Meunier, J. D., Davidian, J. C., Pokrovsky, O. S., Bovet, N., & Keller, C. (2016). Silicon alleviates Cd stress of wheat seedlings (Triticum turgidum L. cv. Claudio) grown in hydroponics. Environmental Science and Pollution Research International, 23(2), 1414-27. https://doi.org/10.1007/s11356-015-5351-4
Rizwan M, et al. Silicon Alleviates Cd Stress of Wheat Seedlings (Triticum Turgidum L. Cv. Claudio) Grown in Hydroponics. Environ Sci Pollut Res Int. 2016;23(2):1414-27. PubMed PMID: 26370813.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silicon alleviates Cd stress of wheat seedlings (Triticum turgidum L. cv. Claudio) grown in hydroponics. AU - Rizwan,M, AU - Meunier,J-D, AU - Davidian,J-C, AU - Pokrovsky,O S, AU - Bovet,N, AU - Keller,C, Y1 - 2015/09/15/ PY - 2015/07/08/received PY - 2015/09/01/accepted PY - 2015/9/16/entrez PY - 2015/9/16/pubmed PY - 2016/9/16/medline KW - Anions KW - Cd KW - Durum wheat KW - Mineral nutrients KW - Photosynthetic pigments KW - SEM-EDX KW - Si KW - Triticum turgidum KW - XPS KW - μXRF SP - 1414 EP - 27 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 23 IS - 2 N2 - We investigated the potential role of silicon in improving tolerance and decreasing cadmium (Cd) toxicity in durum wheat (Triticum turgidum L. durum) either through a reduced Cd uptake or exclusion/sequestration in non-metabolic tissues. For this, plants were grown in hydroponic conditions for 10 days either in presence or absence of 1 mM Si and for 11 additional days in various Cd concentrations (0, 0.5, 5.0 and 50 μM). After harvesting, morphological and physiological parameters as well as elemental concentrations were recorded. Cadmium caused reduction in growth parameters, photosynthetic pigments and mineral nutrient concentrations both in shoots and roots. Shoot and root contents of malate, citrate and aconitate increased, while contents of phosphate, nitrate and sulphate decreased with increasing Cd concentrations in plants. Addition of Si to the nutrient solution mitigated these adverse effects: Cd concentration in shoots decreased while concentration of Cd adsorbed at the root cell apoplasmic level increased together with Zn uptake by roots. Overall, total Cd uptake decreased in presence of Si. There was no co-localisation of Cd and Si either at the shoot or at the root levels. No Cd was detected in leaf phytoliths. In roots, Cd was mainly detected in the cortical parenchyma and Si at the endodermis level, while analysis of the outer thin root surface of the plants grown in the 50 μM Cd + 1 mM Si treatment highlighted non-homogeneous Cd and Si enrichments. These data strongly suggest the existence of a root localised protection mechanism consisting in armoring the root surface by Si- and Cd-bearing compounds and in limiting root-shoot translocation. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/26370813/Silicon_alleviates_Cd_stress_of_wheat_seedlings__Triticum_turgidum_L__cv__Claudio__grown_in_hydroponics_ DB - PRIME DP - Unbound Medicine ER -