Bioconcentration and Intracellular Storage of Hexachlorobenzene in Charophytes and Their Potential Role in Monitoring and Remediation Actions.

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Authors

SCHNEIDER S. C. NIZZETTO Luca

Year of publication 2012
Type Article in Periodical
Magazine / Source Environmental Science and Technology
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1021/es302185g
Field Soil contamination adn decontamination incl. pesticides
Keywords 2-PHOTON EXCITATION MICROSCOPY; ORGANIC-CHEMICALS; WATER; MACROPHYTES; CHARA; LAKE; PHYTOPLANKTON; ACCUMULATION; PHENANTHRENE; POLLUTANTS
Description We investigated the bioaccumulation of hexachlorobenzene (HCB, LogK(OW)5.5) in a benthic charophycean macro_alga: Chara rudis. Chara species are a group of common freshwater algae with a complex body structure encompassing a protective layer of cortex cells surrounding large internode cells. The charophyte cell wall has many features in common with that of higher plants; therefore, they are useful models to investigate bioaccumulation mechanisms in general. We found that HCB diffused through the cortex and reached the cytoplam of internode cells. More than 90% of the HCB mass found in the organism was in the cortex and 10% in the internode cell cytoplasm. The cortex reached a pseudoequilibrium partitioning with water, and the bioconcentration factor was in the same range aquatic organisms such as phytoplankton. Charophytes are therefore very efficient accumulators of hydrophobic compounds. Based on the structural and ecological features of charophytes, we speculated on their possible use as biomonitors and bioremediation tools.
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