Antibiotic-induced DNA methylation changes in calluses of Arabidopsis thaliana (original) (raw)
Abstract
This study was carried out to determine the involvement of the antibiotic kanamycin, commonly used as a selective agent in transformation protocols, in the phenomenon of somaclonal variation. Both genetic and epigenetic events were looked for. Two complementary approaches were used to evaluate global methylation changes in the genome of callus derived from the leaves of Arabidopsis thaliana L.; immunolabelling using monoclonal-antibodies raised against 5-methylcytosine in order to define the relative abundance of methylated cytosine; the analysis of methylation-sensitive polymorphism technique (MSAP) to assess methylation changes at CCGG sequences. In addition, the same samples were analysed using AFLPs in order to determine the extent of genomic change with respect to callus grown in the absence of kanamycin and plants grown from seed. The use of kanamycin as a selective agent caused extensive methylation changes in the genome with both hyper- and hypomethylation events seen. However, the net result was genome-wide hypomethylation: this effect was dosage dependent; the higher the dose, the greater the effect. At the same time, sequence mutation was detected.
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Authors and Affiliations
- Dipartimento di Biologia, Sezione di Botanica Generale, Universita di Milano, Via Celoria 26, 20133, Milano, Italy
Mauro Bardini, Mark Winfield & Francesco Sala - Dipartimento di Scienze dell Ambiente e del Territorio, Universita degli Studi di Milano- Bicocca, P.zza della Scienza n. 1, 20126, Milano, Italy
Mauro Bardini, Massimo Labra, Mark Winfield & Francesco Sala
Authors
- Mauro Bardini
- Massimo Labra
- Mark Winfield
- Francesco Sala
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Bardini, M., Labra, M., Winfield, M. et al. Antibiotic-induced DNA methylation changes in calluses of Arabidopsis thaliana.Plant Cell, Tissue and Organ Culture 72, 157–162 (2003). https://doi.org/10.1023/A:1022208302819
- Issue date: February 2003
- DOI: https://doi.org/10.1023/A:1022208302819