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Development-dependent inheritance of 5-azacytidine-induced epimutations in triticale: analysis of rDNA expression patterns.
- Source :
- Chromosome Research; Nov1997, Vol. 5 Issue 7, p445-450, 6p
- Publication Year :
- 1997
-
Abstract
- Genomic imprinting of rye origin rDNA sequences in triticale is modulated by DNA methylation responsible for ontogenic expression patterns of those sequences. Considering the dynamic nature of these phenomena, we evaluated the influence of plant development on the inheritance of modified rye rDNA expression patterns. DNA hypomethylation was induced in triticale by 5-azacytidine (5AC) treatments at distinct developmental stages of M<subscript>1</subscript> plants, and expression patterns were analysed in M<subscript>2</subscript>. The activity of rye origin rRNA genes in progeny of untreated and 5AC-treated plants was evaluated by silver staining in meristematic root tip cells and in meiocytes at diplotene. In the progeny of 5AC-treated plants, a significant increase in rye rDNA expression was observed, contrasting with the residual activity in untreated plants. Significant differential effects of 5AC treatments were observed in M<subscript>2</subscript> plants and correlated with the M<subscript>1</subscript> plant developmental stage in which DNA hypomethylation was induced. Hypotheses to explain the origin of those differences are discussed here. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09673849
- Volume :
- 5
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Chromosome Research
- Publication Type :
- Academic Journal
- Accession number :
- 50021029
- Full Text :
- https://doi.org/10.1023/A:1018460828720