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Potential of Panicum aquanticum Poir. (Poaceae) for the phytoremediation of aquatic environments contaminated by lead.

Authors
  • Pires-Lira, Marinês F1
  • de Castro, Evaristo M2
  • Lira, Jean Marcel S3
  • de Oliveira, Cynthia4
  • Pereira, Fabrico J3
  • Pereira, Marcio P2
  • 1 Department of Biology, Federal University of Lavras, CP 3037, 37200-000, Lavras, Minas Gerais, Brazil. Electronic address: [email protected] , (Brazil)
  • 2 Department of Biology, Federal University of Lavras, CP 3037, 37200-000, Lavras, Minas Gerais, Brazil. , (Brazil)
  • 3 Institute of Natural Sciences, Federal University of Alfenas, 37130-001, Alfenas, Minas Gerais, Brazil. , (Brazil)
  • 4 Department of Soil Science, Federal University of Lavras, CP 3037, 37200-000, Lavras, Minas Gerais, Brazil. Electronic address: [email protected] , (Brazil)
Type
Published Article
Journal
Ecotoxicology and Environmental Safety
Publisher
Elsevier
Publication Date
Feb 21, 2020
Volume
193
Pages
110336–110336
Identifiers
DOI: 10.1016/j.ecoenv.2020.110336
PMID: 32092581
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Aquatic environments contaminated by lead (Pb) are a problem in many regions of world. Since Pb has high toxicity, the identification of species for phytoremediation is important for the recovery of these areas. Thus, the phytoremediation potential of Panicum aquaticum Poir. (Poaceae) was evaluated. The anatomical and physiological responses of P. aquaticum were assessed under different concentrations of Pb [0.0, 0.5, 1.0, 2.0, 4.0, and 8.0 mM of Pb(NO3)2]. Plant growth, anatomy of roots and leaves, root uptake, root to shoot translocation, and the concentration and accumulation of Pb in organs were analyzed. Regarding leaf anatomy, Pb treatment led to changes in epidermis thickness, stomatal density, stomatal diameter, and sclerenchymal area. Endoderm thickness was increased at the highest concentrations of Pb, which may be related to reduced translocation and shoot accumulation. The roots of P. aquaticum presented increased absorption (2279 μg g-1 DW-1 of Pb). In conclusion, P. aquaticum was found to have potential for the phytoremediation of areas contaminated with Pb. Copyright © 2020 Elsevier Inc. All rights reserved.

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