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Time dependent uptake, bioaccumulation and biotransformation of cell free crude extract microcystins from Lake Amatitlán, Guatemala by Ceratophyllum demersum, Egeria densa and Hydrilla verticillata.

Authors :
Romero-Oliva CS
Contardo-Jara V
Pflugmacher S
Source :
Toxicon : official journal of the International Society on Toxinology [Toxicon] 2015 Oct; Vol. 105, pp. 62-73. Date of Electronic Publication: 2015 Aug 29.
Publication Year :
2015

Abstract

Recent studies evidence that macrophytes can uptake and bioaccumulate microcystins (MC) from contaminated environments, suggesting their use in phytoremediation. In the present study Ceratophyllum demersum, Egeria densa and Hydrilla verticillata were exposed to cell free crude extracts (CE) containing three MC congeners MC-LR, MC-RR and MC-YR at a total MC concentration of 104.4 ± 7.6 μg/L from Lake Amatitlán, Guatemala. Time dependent total glutathione (tGSH), glutathione disulfide (GSSG), disappearance of MC from exposure medium and macrophyte uptake as well as calculated uptake and biotransformation rates and bioconcentration factors (BCF) were monitored after 1, 4, 8 hours (h) and 1, 3, 7 and 14 days (d). Results showed that tGSH concentrations in all exposed macrophytes were enhanced by CE. Disappearance of 62.1 ± 13, 40.8 ± 3.1 and 37.8 ± 3.5 μg/L total MCs from exposure mediums with E. densa, H. verticillata and C. demersum were observed after 1 h. Followed by the total elimination of MCs in exposure medium from H. verticillata after 14 d. Highest MC bioaccumulation capacity (BCF), was observed in E. densa followed by C. demersum and H. verticillata. The here presented results imply the strong MC phytoremediation potential of the evaluated macrophytes.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-3150
Volume :
105
Database :
MEDLINE
Journal :
Toxicon : official journal of the International Society on Toxinology
Publication Type :
Academic Journal
Accession number :
26325293
Full Text :
https://doi.org/10.1016/j.toxicon.2015.08.017