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Title: | Effect of selenium and soil pH on cadmium phytoextraction by Urochloa decumbens grown in Oxisol | Authors: | BORGO, Lucelia Rabelo, Flavio Henrique Silveira Rossi, Monica Lanzoni dos Santos, Felipe Hipolito Nogueira, Maria Luiza Ginez Alleoni, Luis Reynaldo Ferracciu Linhares, Francisco Scaglia VANGRONSVELD, Jaco Lavres, Jose |
Issue Date: | 2023 | Publisher: | ELSEVIER | Source: | JOURNAL OF HAZARDOUS MATERIALS, 447 (Art N° 130771) | Abstract: | It has been speculated that selenium (Se) supply can affect cadmium (Cd) 'availability' and increase the Cd tolerance of plants used for phytoextraction, in a pH-dependent process. Thus, we evaluated the interaction Cd-Se and the effects of soil pH in this interaction on plant availability of Cd and phytoextraction efficiency of Urochloa decumbens cv. Basilisk grown in Oxisol. Two soil concentrations of Cd (0.93 and 3.6 mg kg-1) and Se (<0.2 and 1 mg kg-1) and two soil pH (0.01 mol L-1 CaCl2) conditions (4.1 and 5.7) were considered. At both pH, Se supply increased the exchangeable fraction of Cd and decreased the residual Cd fraction. At pH 4.1, the growth of U. decumbens was impaired by Se addition, regardless of Cd exposure. The lower root growth and tillering of U. decumbens exposed to Cd disappeared at pH 5.7 due to uptake of low Se concentrations. Thus, the toxic or beneficial effects of Se on growth of U. decumbens used for Cd phytoextraction depend on the amount of Se assimilated. The Cd phytoextraction efficiency of U. decumbens was not improved by Se supply, regardless of soil pH. Therefore, we cannot recommend the application of Se to increase Cd phytoextraction by this grass. | Notes: | Borgo, L (corresponding author), Ctr Energia Nucl Agr, Lab Isotopos Estaveis, Ave Centenario 303,Sao Dimas,Caixa Postal 96, BR-13400970 Piracicaba, SP, Brazil. borglucelia@gmail.com |
Keywords: | Ionome;Root growth;Selenate;Signal grass;Toxicity;Tropical soils | Document URI: | http://hdl.handle.net/1942/40030 | ISSN: | 0304-3894 | e-ISSN: | 1873-3336 | DOI: | 10.1016/j.jhazmat.2023.130771 | ISI #: | 000964209100001 | Rights: | 2023 Elsevier B.V. All rights reserved. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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Effect of selenium and soil pH on cadmium phytoextraction by Urochloa decumbens grown in Oxisol.pdf Restricted Access | Published version | 1.77 MB | Adobe PDF | View/Open Request a copy |
Effect of selenium.pdf Until 2025-04-05 | Peer-reviewed author version | 5.35 MB | Adobe PDF | View/Open Request a copy |
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