EFFECT OF SOME TOXIC ELEMENTS ON GERMINATION OF ERUCA SATIVA SEEDS

Abstract

The effect of some Toxic elements which included Lead, Cadmium, Mercury, Arsenic and Tin on germination of rocket seeds (Eruca sativa) was studied at concentrations:1,10,100,500,1000 mg/L in sterilized distilled water to cover a wide range of concentrations including those found at natural environments and those found in contaminated environments on germination of Eruca sativa seeds. Germination process extended for 5 days and then germinated seeds were counted. Results showed that there is an inverse relationship between element concentrations and the number of germinated seeds, so the correlation coefficient had negative value. For Lead ( r = -0.912 ), Cadmium ( r= -0.945 ), Mercury (r = - 0.929 ), Arsenic ( r = -0.51 ) and Tin ( r= -0.983 ). The pHs of solutions influenced the germination but at low extent and their correlation coefficients were non significant (p≤0.05) except that of arsenic. According to the results obtained by this study the elements can be ranked for their negative affect as follows: Lead < Tin < Mercury < Cadmium < Arsenic.