Produção Nacional
Revisado por pares
A low-cost and environmentally-friendly potential procedure for inorganic-As remediation based on the use of fungi isolated from rice rhizosphere
2015; Elsevier BV; Volume: 4; Issue: 1 Linguagem: Inglês
10.1016/j.jece.2015.12.029
ISSN2213-3437
AutoresBruno Lemos Batista, Camila Veronez Barião, Juliana Maria Oliveira Souza, Ana Carolina Cavalheiro Paulelli, Bruno Alves Rocha, Anderson Rodrigo Moraes de Oliveira, Fabiana Roberta Segura, Gilberto Úbida Leite Braga, Ludmilla Tonani, Márcia Regina von Zeska Kress, Fernando Barbosa,
Tópico(s)Chromium effects and bioremediation
ResumoRice, a staple food for over half of the world's population, represents a significant dietary source of inorganic arsenic. Thus, it is of great importance to reduce the levels of inorganic arsenic in rice with minimal cost and efficiency. Based on this, the present study focused on the isolation and identification of fungi present in soil rhizosphere to be used as a low-cost and environmentally-friendly procedure for inorganic arsenic remediation. Soil samples, from rice production areas, were evaluated in matter of toxic and essential elements (Pb, Cd, Ni, Mn, Se, Co, Cr, Ba, Rb, U, Cs, V, Cu, Fe, Mg, Zn) by inductively coupled mass spectrometry (ICP-MS). The isolated and identified filamentous fungi were Penicillium sp., Aspergillus sp., Trichoderma sp., Cladosporium sp., Rhizopus sp. and Westerdykella sp. Fungi were submitted to As3+ exposure in Czapeck growth media, and the biomass and broth of each fungus were analyzed by high performance liquid chromatography coupled to ICP-MS. The results have shown capacity of arsenic biotransformation and accumulation. Arsenic-tolerance test (0–50 mg l−1 As3+) has shown that the most arsenic-tolerant genera were Penicillium sp. and Aspergillus sp. Our data led us to believe that filamentous fungi may influence on arsenic biogeochemistry in rice paddy soils and further these microorganisms might be potentially used for bioremediation.
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