PMID: 18709922Aug 20, 2008Paper

Physiological responses of Juncus effusus (Rush) to chromium and relevance for wastewater treatment in constructed wetlands

International Journal of Phytoremediation
H GruberK-J Appenroth

Abstract

Constructed wetlands are increasingly applied for industrial wastewater treatment. However, current knowledge of the stress responses of helophytes to selected toxicants such as dichromate is limited. The goal of the experiments presented here was to characterize the physiological response of Juncus effusus to different concentrations of dichromate dependent upon the growth and constitution of the plants. The growth parameters, shoot length, and dry weight already were strongly affected at low dichromate concentrations of approximately 34 microM. Concentrations of 340 microM impaired chlorophyll fluorescence and a decrease in chlorophyll a started at concentrations higher than 170 microM dichromate. The concentrations of chlorophyll b and carotenoids also were influenced negatively. Thus, the reduction of the pigment content started before any obvious influence on the chlorophyll fluorescence. The highest concentration of dichromate, which caused no permanent inhibition of growth and photosynthesis, was found to be 17 microM K2Cr2O7. In principle, J. effusus is suitable for constructed wetlands to treat chromium-containing wastewater. Because the stress resistance of J. effusus is limited, the maximum concentration of dichromat...Continue Reading

References

May 1, 1978·Canadian Journal of Microbiology·S L SnyderJ M Sheil
Apr 1, 1969·Physiological Reviews·W Mertz
May 12, 2001·FEMS Microbiology Reviews·C CervantesR Moreno-Sánchez
Sep 22, 2001·Journal of Hazardous Materials·S RengarajS H Moon
Apr 23, 2003·Ecotoxicology and Environmental Safety·Nirupama Mallick, F H Mohn

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Citations

May 9, 2013·Carbohydrate Research·Garima BaliArthur J Ragauskas
Aug 28, 2014·Journal of Hazardous Materials·Helen DimitroulaNicolas Kalogerakis
Jun 17, 2015·Ecology and Evolution·Stefan G Michalski, Walter Durka

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