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Somatic mutations in tradescantia stamen hairs exposed to ethyl methanesulfonate



Somatic mutations in tradescantia stamen hairs exposed to ethyl methanesulfonate



Environmental and Experimental Botany 18(1): 19-26



Young inflorescences of Tradescantia (BNL clone 02) heteroxygous for flower color were treated with O (water), 0.1 or 0.5% EMS [ethyl methanesulfonate] solutions for 2, 4, 8 or 16 h. The frequency of somatic pink mutations in the stamen hairs scored 10-18 days after treatments was higher with the higher concentration of EMS and increased with lengthening duration of the treatment. The mutation frequency was also found to be clearly a function of the EMS dose in % .cntdot. h. The frequency of mutation increases with EMS dose; on a log-log graph the slopes were 1.37 or 1.31, when the mutation frequency was expressed as the number of pink mutant events per 103 hairs or per 105 cell divisions, respectively. That the slopes are steeper than 1 suggests the involvement of 2-break deletions, but the possibility of insufficient penetration of EMS in cases of shorter treatments cannot be ruled out. The mutation frequencies observed were somewhat comparable to those induced by 0.25-10 rad of sparsely ionizing radiations at various dose rates.

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Accession: 006437580

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DOI: 10.1016/0098-8472(78)90016-3



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