title: Phytoremediation potential of chromium-containing tannery effluent-contaminated soil by native Indian timber-yielding tree species.
abstract: Twenty-six native Indian tree species that are used for the enhanced tree cover program of the forest department (Government of Tamilnadu, India) were screened for phytoremediation of tannery effluent-contaminated soil containing high chromium content. Out of 26 tree species tested, 10 timber-yielding tree species were selected for further phytoremediation monitoring. After a series of treatments with tannery effluent sludge, the chromium content was measured in the plant parts. The saplings of Acacia auriculiformis, Azadirachta indica, Albizzia lebbeck, Dalbergia sisso, and Thespesia populnea were identified as efficient bioaccumulators of chromium from Cr-contaminated soil. Acacia auriculiformis accumulates higher amounts of Cr in both the root and stem. Dalbergia sisso and T. populnea were found to accumulate higher quantity of Cr in the roots, whereas A. indica, A. richardiana, and A. lebbeck accumulate Cr in their stem. The stress response of the plant species was assessed by quantifying the antioxidative enzymes such as catalase, superoxide dismutase, glutathione reductase, and DHAR. Activity of all the enzymes was observed to gradually increase following treatment with tannery effluent sludge.
authors.affiliation: a Department of Bioresource and Food Science , Konkuk University , Seoul , Korea.
authors.forename: Muthu
authors.initials: M
authors.lastname: Manikandan
authors.affiliation: b Center for Advanced Studies in Botany , University of Madras , Chennai , India.
authors.forename: Vijayaraghavan
authors.initials: V
authors.lastname: Kannan
authors.affiliation: b Center for Advanced Studies in Botany , University of Madras , Chennai , India.
authors.forename: Kanimozhi
authors.initials: K
authors.lastname: Mahalingam
authors.affiliation: c Department of Biotechnology , Indian Institute of Madras , Chennai , India.
authors.forename: A
authors.initials: A
authors.lastname: Vimala
authors.affiliation: a Department of Bioresource and Food Science , Konkuk University , Seoul , Korea.
authors.forename: Sechul
authors.initials: S
authors.lastname: Chun
mesh_terms: D001673:Biodegradation, Environmental; D002374:Catalase / Q000378:metabolism; D002857:Chromium / Q000032:analysis*; D005980:Glutathione Reductase / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis*; D013482:Superoxide Dismutase / Q000378:metabolism; D014197:Trees; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D002857:Chromium; D010088:Oxidoreductases; D002374:Catalase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase; C020666:glutathione dehydrogenase (ascorbate)
keywords: Chromium; phytoremediation; tannery effluent; timber yielding; tree species