title: Response of antioxidants in sunflower (Helianthus annuus L.) grown on different amendments of tannery sludge: its metal accumulation potential.
abstract: The interaction of metals present in tannery waste and their tolerance in the plants of sunflower (Helianthus annuus L.) was studied in the present paper under field conditions. Effects of 100% tannery sludge and various amendments of tannery sludge (10%, 25%, 35%, 50%, 75%) along with one set of control were studied on the physiological and biochemical parameters of the plant along with their metal accumulation potential after 30, 60 and 90d after sowing. The plants of H. annuus were found effective in the accumulation of metals (Cr, Fe, Zn and Mn) in roots, shoots and leaves, however, the level of toxic metal, Cr was found below detection limit in the seeds of the plant. The oil was extracted from the seeds of the plant and the level of oil content was increased up to 35% tannery sludge as compared to control followed by decrease at higher tannery sludge ratio. An increase in the chlorophyll, protein, cysteine, non-protein thiol and sugar contents was observed at the lower amendment of tannery sludge at initial exposure periods followed by decrease than their respective controls. Malondialdehyde content in the roots and leaves was increased beyond 50% sludge amendments at all the exposure periods as compared to control. However, proline and ascorbic acid contents of the roots and leaves of the plant increased at all the exposure periods and sludge amendments, compared to their respective controls.
authors.affiliation: Ecotoxicology and Bioremediation, Environmental Sciences Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India. sinha_sarita@rediffmail.com
authors.forename: Shraddha
authors.initials: S
authors.lastname: Singh
authors.forename: Rohit
authors.initials: R
authors.lastname: Saxena
authors.forename: Kavita
authors.initials: K
authors.lastname: Pandey
authors.forename: Kavita
authors.initials: K
authors.lastname: Bhatt
authors.forename: Sarita
authors.initials: S
authors.lastname: Sinha
mesh_terms: D000704:Analysis of Variance; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism; D050260:Carbohydrate Metabolism; D002734:Chlorophyll / Q000378:metabolism; D003545:Cysteine / Q000378:metabolism; D006368:Helianthus / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D007194:India; D008315:Malondialdehyde / Q000378:metabolism; D019216:Metals, Heavy / Q000493:pharmacokinetics* / Q000633:toxicity*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D011392:Proline / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D012639:Seeds / Q000378:metabolism; D013054:Spectrophotometry, Atomic; D013438:Sulfhydryl Compounds / Q000378:metabolism; D013633:Tanning; D013997:Time Factors; D014866:Waste Products / Q000032:analysis
chemical_list: D000975:Antioxidants; D019216:Metals, Heavy; D011506:Proteins; D013438:Sulfhydryl Compounds; D014866:Waste Products; D002734:Chlorophyll; D008315:Malondialdehyde; D011392:Proline; D003545:Cysteine; D001205:Ascorbic Acid