Low doses of 131I (5 to 100 nCi) were applied to the inflorescence of Tradescantia clone 02 and the mutational events were observed in the stamen hair cells. A linear dose-effect relationship was obtained over this very low dose range. However, environmental condition may cause fluctuation in mutation frequency; therefore, it is suggested that great caution has to be paid to elucidate the validity of this monitoring system.
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Tano et al. (1979) studied this question.
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