Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/120328
Autor(es): | Fernandes J.P. Almeida C.M.R. Andreotti F. Barros L. Almeida T. Mucha A.P. |
Título: | Response of microbial communities colonizing salt marsh plants rhizosphere to copper oxide nanoparticles contamination and its implications for phytoremediation processes |
Editor: | Elsevier |
Data de publicação: | 2017 |
Resumo: | This study aimed to investigate Cu oxide nanoparticles (CuO NP) effect on microbial communities associated with salt marsh plants (Halimione portulacoides and Pragmites australis) rhizosphere and its implications for phytoremediation processes. Experiments were conducted, under controlled conditions, over one week. Rhizosediment soaked in the respective elutriate (a simplified natural medium) with or without plants, was doped with CuO NP or with Cu in ionic form. Microbial community in rhizosediments was characterized in terms of abundance (by DAPI) and structure (by ARISA). Metal uptake by plants was evaluated by measuring Cu in plant tissues (by atomic absorption spectroscopy). Results revealed significant metal uptake but only in plant roots, which was significantly lower (H. portulacoides) or not significant (P. australis) when the metal was in NP form. Microbial community structure was significantly changed by the treatment (absence/presence of Cu, ionic Cu or CuO NP) as showed by multivariate analysis of ARISA profiles and confirmed by analysis of similarities (Global test - one way ANOSIM). Moreover, in P. australis rhizosediments microbial abundance, bacterial richness and diversity indexes were significantly affected (increased or decreased) due to metal presence whereas in H. portulacoides rhizosediment microbial abundance showed a significant decrease, particularly when the metal was in NP form. Accordingly, Cu presence affected the response of the rhizosphere microbial community and in some cases that response was significantly different when Cu was in NP form. The response of the microbial communities to Cu NP might also contribute to the lower metal accumulation by plants when the metal was in this form. So, Cu NP may cause disturbances in ecosystems functions, ultimately affecting phytoremediation processes. These facts should be considered regarding the use of appropriate salt marshes plants to remediate moderately impacted areas such as estuaries, where NPs can be found. © 2017 Elsevier |
Assunto: | Absorption spectroscopy Bioremediation Copper Copper oxides Ecology Ecosystems Microorganisms Multivariant analysis Nanoparticles Remediation Social sciences Soils Wetlands Atomic absorption spectroscopy Bacterial community structure Copper oxide nanoparticles Halimione portulacoides Microbial community structures Multi variate analysis Phytoremediation Rhizosphere microbial communities Metals copper copper ion copper oxide nanoparticle community structure copper compound microbial community nanoparticle phytoremediation plant pollutant rhizosphere saltmarsh Article atomic absorption spectrometry bioaccumulation community structure controlled study estuary Halimione portulacoides microbial colonization microbial community microbial diversity nonhuman phytoremediation plant metabolism plant tissue population abundance Pragmites australis rhizosphere rhizospheric microorganism salt marsh species richness vascular plant Bacteria (microorganisms) Halimione portulacoides Phragmites australis |
URI: | https://hdl.handle.net/10216/120328 |
Fonte: | Science of the Total Environment, vol. 581-582, p. 801-810 |
Informação Relacionada: | info:eu-repo/grantAgreement/FCT/5876/147268/PT |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | restrictedAccess |
Aparece nas coleções: | CIIMAR - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Fernandes JP_2017.pdf Restricted Access | 1.07 MB | Adobe PDF | Request a copy |
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.