Abstract
Objective
The study aims to determine the Lethal Dose 50 (LD50) of Echeveria varieties as induced by chemical mutagens.
Methods
Three cultivated varieties from Echeveria species, namely ‘Brave,’ ‘Viyant,’ and ‘Snow bunny,’ were induced with chemical mutagens: colchicine, ethyl methanesulfonate (EMS), methyl methanesulfonate (MMS), and sodium azide (NaN3). Each mutagen was diluted to different concentrations: colchicine (0.2%, 0.4%, 0.6%, 0.8%, 1.0%), NaN3 (0.02%, 0.04%, 0.06%, 0.08%, 0.1%), EMS, and MMS (0.1%, 0.2%, 0.3%, 0.4%, 0.5%). Soaking durations for each concentration level were 3, 6, 9, and 12 h. The survival rate and phenotypic data for mutated plants per variety in response to chemical mutagens were collected.
Results
The LD50 evaluation revealed maximum concentration and treatment duration vary per varieties. Regardless of varieties, EMS-treated leaf cuttings had the highest survival rate. However, upon phenotypic evaluation, the results revealed that mutagenic plants were only taken from those treated with colchicine.
Conclusion
The use of colchicine to produce mutated succulents should be further investigated at the molecular level. The results of the study are highly beneficial for mutation breeding programs for other succulent varieties or other related crops.
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Acknowledgements
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2017R1C1B5017830).
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Raisa Aone M. Cabahug, My Khanh Tran Thi Ha, Ki-Byung Lim, and Yoon-Jung Hwang declare that they have no conflict of interest.
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Cabahug, R.A.M., Ha, M.K.T.T., Lim, KB. et al. LD50 determination and phenotypic evaluation of three Echeveria varieties induced by chemical mutagens. Toxicol. Environ. Health Sci. 12, 1–9 (2020). https://doi.org/10.1007/s13530-020-00049-3
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DOI: https://doi.org/10.1007/s13530-020-00049-3