دورية أكاديمية
Is arsenite more toxic than arsenate in plants?
| العنوان: | Is arsenite more toxic than arsenate in plants? |
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| المؤلفون: | Coelho DG; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., Marinato CS; Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., de Matos LP; Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., de Andrade HM; Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., da Silva VM; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., Santos-Neves PH; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., Araújo SC; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil., Oliveira JA; Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brasil. jalves@ufv.br. |
| المصدر: | Ecotoxicology (London, England) [Ecotoxicology] 2020 Mar; Vol. 29 (2), pp. 196-202. Date of Electronic Publication: 2020 Jan 26. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Kluwer Academic Publishers Country of Publication: United States NLM ID: 9885956 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-3017 (Electronic) Linking ISSN: 09639292 NLM ISO Abbreviation: Ecotoxicology Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 1999- : Boston : Kluwer Academic Publishers Original Publication: London : Chapman & Hall, |
| مواضيع طبية MeSH: | Arsenates/*toxicity , Arsenites/*toxicity , Environmental Pollutants/*toxicity , Plants/*drug effects, Araceae/physiology ; Biodegradation, Environmental ; Malondialdehyde ; Superoxide Dismutase/metabolism |
| مستخلص: | In order to evaluate the differential absorption and toxicity of arsenate (As V ) and arsenite (As III ), Lemna valdiviana plants were grown in a nutrient solution and subjected to 0.0 (control); 0.5; 1.0; 1.5; 2.0; 3.0; 4.0; 5.0 and 7.5 mg L -1 of As III or As V for three days. Exposure to both chemical forms resulted in As bioaccumulation, although As III -grown plants showed higher As content in tissues. In As V -grown plants, the relative growth rate (RGR) decreased to 50%, at a concentration of 4.0 mg L -1 , while for treatments with As III , the same decrease was observed at 1.0 mg L -1 . The tolerance index decreased with increasing concentrations, with lower values for As III . Plants treated with As III showed increased superoxide anion levels, whilst higher levels of hydrogen peroxide were present in AsV-treated plants. Moreover, malondialdehyde (MDA) levels were higher for plants subjected to As III when compared to As V at lower concentrations. Concentrations of 1 mg L -1 of As III and 4 mg L -1 of As V showed equivalent MDA levels. Superoxide dismutase and catalase activities were increased at low concentrations and were inhibited at higher concentrations of As III and As V , whereas peroxidase activity was positively modulated by increased As III or As V concentrations. In conclusion, L. valdiviana plants took up and accumulated arsenic as As III or As V , demonstrating the potential for phytoremediation of this metalloid. Furthermore, As III -exposed plants showed enhanced toxicity when compared to As V , at the same applied concentration, although toxicity was more related to internal As concentrations, regardless of the chemical form applied. |
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| فهرسة مساهمة: | Keywords: Aquatic macrophyte; Arsenic tolerance; Lemna valdiviana; Oxidative stress; Phytoremediation |
| المشرفين على المادة: | 0 (Arsenates) 0 (Arsenites) 0 (Environmental Pollutants) 4Y8F71G49Q (Malondialdehyde) EC 1.15.1.1 (Superoxide Dismutase) |
| تواريخ الأحداث: | Date Created: 20200127 Date Completed: 20200325 Latest Revision: 20200930 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1007/s10646-019-02152-9 |
| PMID: | 31982987 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 1573-3017 |
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| DOI: | 10.1007/s10646-019-02152-9 |