Abstract
This research involved testing the mutagenic ability of the volatile oil of Mentha longifolia on the conidia of fungus Aspergillus amstelodami .the inhibitory effect of different concentrations of volatile oil of Mentha were investigated so the percentage of inhibition were 20.89%-65.5% of concentrations(0.008-0.1) ml/ml. The mutagenicity of four sublethal concentrations (0.03 , 0.04 , 0.05 and 0.06 ml/ml) were tested by using three methods namly pretreatment, growth mediated and plate incorporation method, Non of the concentrations tested of volatile oil of M. longifolia were showed any mutagenic effect on conidia of fungus A. amstelodami ,so we can consider the volatile oil of M. longifolia is genetically safe .
