Transfer Factors (Fv) of 238U, 226Ra, 234Th, 210Po and 210Pb from five different agricultural soils in semi-arid region (Syria) to four different barley genotypes were studied in an agricultural potted experiment. The geometric mean of the Fv values were (0.08) for 210Pb, and (0.02) for 210Po, while it ranged from 0.18 to 0.42 ,from 0.08 to 0.15 and from 0.22 to 0.4 for 238U, 234Th and 226Ra, respectevily. The Fv values of 238U and 226Ra were within the recommended global medians, while the Fv values of 234Th, 210Pb and 210Po were higher. There is no clear relationship between the soil properties and Fv of all studied radionuclides to barley genotypes. Moreover, the expression of glutathione (GSH) gene, which is belived to be involoved in heavy metal removal was generally low in all studied varieties grown in all soil types.
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