Role of Geitlerinema sp. DE2011 and Scenedesmus sp. DE2009 as bioindicators and immobilizers of chromium in a contaminated natural environment
Millach, Laia (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Solé Cornellà, Antoni (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Esteve, Isabel (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)

Date:	2015
Abstract:	The aim of this work was to study the potential of the two phototrophic microorganisms, both isolated from Ebro Delta microbial mats, to be used as bioindicators and immobilizers of chromium. The results obtained indicated that (i) the Minimum Metal Concentration (MMC) significantly affecting Chlorophyll a intensity in Geitlerinema sp. DE2011 and Scenedesmus sp. DE2009 was 0. 25 µM and 0. 75 µM, respectively, these values being lower than those established by current legislation, and (ii) Scenedesmus sp. DE2009 was able to immobilize chromium externally in extracellular polymeric substances (EPS) and intracellularly in polyphosphate (PP) inclusions. Additionally, this microorganism maintained high viability, including at 500 µM. Based on these results, we postulate that Geitlerinema sp. DE2011 and Scenedesmus sp. DE2009 are good chromium-indicators of cytotoxicity and, further, that Scenedesmus sp. DE2009 plays an important role in immobilizing this metal in a contaminated natural environment.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Bioindicators ; Chromium ; Geitlerinema ; Scenedesmus
Published in:	BioMed research international, Vol. 2015 (2015) , article ID 519769, ISSN 2314-6133

DOI: 10.1155/2015/519769
PMID: 26167488

12 p, 4.7 MB

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