Effect of veterinary antibiotics on the seed germination of indica rice varieties

Abstract

The effect of three antibiotics with different action modes (namely, tetracycline, amoxicillin and trimethoprim) on three different rice ( Oryza sativa L.) varieties. Each antibiotic test had 6 treatments with tetracycline and amoxicillin concentrations of 0, 1, 10, 100, 1000, 10000 mg/L. The trimethoprim test also had 6 treatments with varying concentrations of 0,1,10, 50,100, 500 mg/L. The range of phytotoxicity of the antibiotics was on three types of indigenous rice species at the concentration of EC50 0.2 > 10,000 mg/L. None of the antibiotics caused a significant decrease in seed germination for three types of rice plant species. Compared with seedling vigor index, shoot and total length measurements, root elongation was consistently the most sensitive end point. The additional use of screening assays for evaluating environmental impacts of antibiotics can provide insight into relative species sensitivity and serve as a basis by which to screen the potential for toxic effects of novel compounds to plants.