title: In vitro assessment on the impact of soil arsenic in the eight rice varieties of West Bengal, India.
abstract: Rice is an efficient accumulator of arsenic and thus irrigation with arsenic-contaminated groundwater and soil may induce human health hazard via water-soil-plant-human pathway. A greenhouse pot experiment was conducted on three high yielding, one hybrid and four local rice varieties to investigate the uptake, distribution and phytotoxicity of arsenic in rice plant. 5, 10, 20, 30 and 40 mg kg(-1) dry weights arsenic dosing was applied in pot soil and the results were compared with the control samples. All the studied high yielding and hybrid varieties (Ratna, IET 4094, IR 50 and Gangakaveri) were found to be higher accumulator of arsenic as compared to all but one local rice variety, Kerala Sundari. In these five rice varieties accumulation of arsenic in grain exceeded the WHO permissible limit (1.0 mg kg(-1)) at 20 mg kg(-1) arsenic dosing. Irrespective of variety, arsenic accumulation in different parts of rice plant was found to increase with increasing arsenic doses, but not at the same rate. A consistent negative correlation was established between soil arsenic and chlorophyll contents while carbohydrate accumulation depicted consistent positive correlation with increasing arsenic toxicity in rice plant.
authors.affiliation: Department of Environmental Science, University of Kalyani, West Bengal, India; Kanchrapara College, Kanchrapara, North 24 Parganas, West Bengal, India. Electronic address: piyal_green@yahoo.co.in.
authors.forename: Piyal
authors.initials: P
authors.lastname: Bhattacharya
authors.forename: Alok C
authors.initials: AC
authors.lastname: Samal
authors.forename: Jayjit
authors.initials: J
authors.lastname: Majumdar
authors.forename: Satabdi
authors.initials: S
authors.lastname: Banerjee
authors.forename: Subhas C
authors.initials: SC
authors.lastname: Santra
mesh_terms: D057914:Agricultural Irrigation; D000383:Agriculture / Q000379:methods; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry* / Q000633:toxicity; D002241:Carbohydrates / Q000737:chemistry; D002734:Chlorophyll / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods; D005506:Food Contamination; D060587:Groundwater; D007194:India; D012275:Oryza / Q000737:chemistry* / Q000235:genetics / Q000254:growth & development; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D013045:Species Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D002241:Carbohydrates; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D001151:Arsenic