title: Comparative study of plant growth of two poplar tree species irrigated with treated wastewater, with particular reference to accumulation of heavy metals (Cd, Pb, As, and Ni).
abstract: Water is a scarce natural resource around the world which can hamper the socio-economic development of many countries. The Mediterranean area, especially north Africa, is known for its semi-arid to arid climate, causing serious water supply problems. Treated wastewater (TWW) is being used as an alternative strategy for recycling wastewater. It is also a potential source of nutrients for reforestation with certain plant species such as poplar trees, a useful wood resource, and even for phytoremediation purposes. In the present study, we used treated wastewater to irrigate two clones of 1-year-old poplar trees (Populus nigra cv. I-488 and Populus alba cv. MA-104) for 90 days. After a stipulated time, a comparative study was made of the effects of TWW on growth parameters, acquisition of essential minerals (Na, Fe and Zn) and pollutants (Cd, Pb, As and Ni) as well as the enrichment of secondary metabolites such as polyphenolic, flavonoid and tannin compounds which could contribute to the growth and development of poplar plants. The results of this study show that the use of TWW increased P. alba's biomass production by 36% and also enhanced its Cd and Pb accumulation capacity. We also found that P. alba has considerable potential to be used as an alternative plant species for reforestation and/or phytoremediation of toxic metals from contaminated water or effluent.
authors.affiliation: Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, 18080, Granada, Spain.|Agroforestry Unit of the National Institute for Research in Rural Engineering Water and Forestry (INRGREF) of Tunisia, Tunis, Tunisia.|Faculty of Sciences of Bizerte Zarzouna Tunisia, University Tunis Carthage, Zarzouna, Tunisia.
authors.forename: Zarati
authors.initials: Z
authors.lastname: Houda
authors.affiliation: Agroforestry Unit of the National Institute for Research in Rural Engineering Water and Forestry (INRGREF) of Tunisia, Tunis, Tunisia.
authors.forename: Zoubeir
authors.initials: Z
authors.lastname: Bejaoui
authors.affiliation: Agroforestry Unit of the National Institute for Research in Rural Engineering Water and Forestry (INRGREF) of Tunisia, Tunis, Tunisia.
authors.forename: Ali
authors.initials: A
authors.lastname: Albouchi
authors.affiliation: Institut für Radioökologie und Strahlenschutz (IRS), Gottfried Wilhelm Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419, Hannover, Germany.
authors.forename: Dharmendra K
authors.initials: DK
authors.lastname: Gupta
authors.affiliation: Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, 18080, Granada, Spain. javier.corpas@eez.csic.es.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Corpas
mesh_terms: D000352:Africa, Northern; D001673:Biodegradation, Environmental; D004784:Environmental Monitoring; D019216:Metals, Heavy / Q000032:analysis*; D032107:Populus / Q000737:chemistry / Q000254:growth & development*; D059027:Recycling; D012989:Soil Pollutants / Q000032:analysis*; D014197:Trees / Q000378:metabolism; D014865:Waste Disposal, Fluid; D062065:Wastewater
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants; D062065:Wastewater
keywords: Heavy metals; Phytoremediation; Poplar; Wastewater