title: Biochemical and physiological responses of rice (Oryza sativa L.) grown on different sewage sludge amendments rates.
abstract: Using sewage sludge, a biological residue from sewage treatment processes, in agriculture is an alternative disposal technique of waste. To study the biochemical and physiological responses of Rice (Oryza sativa L.) grown on different sewage sludge amendments (SSA) rates a field experiment was conducted by mixing sewage sludge at 0, 3, 4.5, 6, 9, 12 kg m(-2) rate to the agricultural soil. Rate of photosynthesis and stomatal conductance increased in plants grown at different SSA rate. Chlorophyll and protein contents also increased due to different SSA rates. Lipid peroxidation, ascorbic acid, peroxidase activity and proline content increased, however, thiol and phenol content decreased in plants grown at different SSA rates. The study concludes that for rice plant sewage sludge amendment in soil may be a good option as plant has adequate heavy metal tolerance mechanism showed by increased rate of photosynthesis and chlorophyll content and various antioxidant levels.
authors.affiliation: Ecology Research Laboratory, Department of Botany, Banaras Hindu University, Varanasi 221005, India. rajeevprataps@gmail.com
authors.forename: R P
authors.initials: RP
authors.lastname: Singh
authors.forename: M
authors.initials: M
authors.lastname: Agrawal
mesh_terms: D001205:Ascorbic Acid / Q000378:metabolism; D003247:Conservation of Natural Resources; D004305:Dose-Response Relationship, Drug; D004785:Environmental Pollutants / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D005506:Food Contamination / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D015227:Lipid Peroxidation / Q000187:drug effects; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D012275:Oryza / Q000187:drug effects / Q000502:physiology*; D010544:Peroxidases / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects; D010940:Plant Proteins / Q000378:metabolism; D011392:Proline / Q000378:metabolism; D012722:Sewage / Q000009:adverse effects / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D019216:Metals, Heavy; D010940:Plant Proteins; D012722:Sewage; D011392:Proline; D010544:Peroxidases; D001205:Ascorbic Acid