title: Phytoremediation potential of Helianthus annuus L in sewage-irrigated Indo-Gangetic alluvial soils.
abstract: The study of phytoremediation potential of Helianthus annuus L was conducted in the sewage-irrigated Indo-Gangetic alluvial soils, India. Calcium @ 1.0% and Zn @ 40 ppm enhanced the yield of H. annuus L and minimized the toxicity of Cr in the investigated soils. The study indicated that H. annuus L is highly sensitive to Cr and Zn in terms of metallic pollution; and may be used as indicator plant. For Cr-phytoremediation, humic acid treatment @ 500 mL/acre induced the Cr-accumulation in roots (p < 0.007) and in shoots (p < 0.015), which was recorded 3.21 and 3.16 mg/kg in root and shoot of H. annuus L, respectively. We suggest that H. annuus L fulfils the necessary condition for efficiently increasing species bioaccumulation after soil treatment with humic acid in Cr-polluted sewage-irrigated soils through soil- plant rhizospheric processes.
authors.affiliation: Sheila Dhar Institute of Soil Science, Department of Chemistry, University of Allahabad, Allahabad, India.
authors.forename: Dinesh
authors.initials: D
authors.lastname: Mani
authors.forename: Bechan
authors.initials: B
authors.lastname: Sharma
authors.forename: Chitranjan
authors.initials: C
authors.lastname: Kumar
authors.forename: Niraj
authors.initials: N
authors.lastname: Pathak
authors.forename: Shiv
authors.initials: S
authors.lastname: Balak
mesh_terms: D057914:Agricultural Irrigation; D001673:Biodegradation, Environmental; D018533:Biomass; D002118:Calcium / Q000494:pharmacology*; D002857:Chromium / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D006368:Helianthus / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D006812:Humic Substances; D007194:India; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D012722:Sewage; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D015032:Zinc / Q000494:pharmacology*
chemical_list: D006812:Humic Substances; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D002857:Chromium; D015032:Zinc; D002118:Calcium