Genotoxicity of municipal landfill leachate on root tips of Vicia faba.
The genotoxicity of municipal landfill leachate was studied using the Vicia faba root-tip cytogenetic bioassay. Results show that landfill leachates collected in different seasons decreased the mitotic index (MI) and caused significant increases of micronucleus (MN) frequencies and anaphase aberration (AA) frequencies in a concentration-dependent manner (concentration expressed as 'chemical oxygen demand' measured by the method of potassium dichromate oxidation (COD(Cr))). In addition, a seasonal difference in genotoxicity induced by leachate was observed. The results confirm that leachate is a genotoxic agent in plant cells and imply that exposure to leachate in the aquatic environment may pose a potential genotoxic risk to organisms. The results also show that the V. faba cytogenetic bioassay is efficient, simple and reproducible in genotoxicity studies of leachate, and that there is a correlation between the genotoxicity and the chemical measurement (COD(Cr)) of leachate.
Sang
Nan
N
College of Environment and Resource, Shanxi University, Taiyuan, Shanxi 030006, PR China. sangnan_lgkcarl@163.com
Li
Guangke
G
D004785:Environmental Pollutants / Q000633:toxicity*; D015162:Micronucleus Tests; D009153:Mutagens / Q000633:toxicity*; D018517:Plant Roots / Q000187:drug effects*; D012037:Refuse Disposal; D012621:Seasons; D031307:Vicia faba / Q000187:drug effects*
D004785:Environmental Pollutants; D009153:Mutagens