Biodegradation, Environmental, Oxidative Stress, Mustard Plant - enzymology, Thiobarbituric Acid Reactive Substances - metabolism, Hydrogen Peroxide - metabolism, Soil Pollutants - toxicity, Catalase - metabolism, Mercury - toxicity, Lipid Peroxidation - drug effects, Water - chemistry, Geologic Sediments - chemistry, Mustard Plant - metabolism, Superoxide D...