title: RDNA methylation in Hypericum perforatum diploids and tetraploids.
abstract: The effect of the gene dosage on the expression of rRNAs was studied in Hypericum perforatum. The methylation levels of rDNA were analysed using the isoschizomers MspI and HpaII and eleven additional methylation-sensitive enzymes. No differences in rDNA methylation were observed between diploids and tetraploids at an early ontogenetic stage.
authors.affiliation: Institute of Biology and Ecology, Faculty of Science, P. J. Safárik University, Mánesova 23, 04167 Kosice, Slovakia. janaha@kosice.upjs.sk
authors.forename: Jana
authors.initials: J
authors.lastname: Halusková
authors.forename: Benye
authors.initials: B
authors.lastname: Liu
authors.forename: Ludger
authors.initials: L
authors.lastname: Beerhues
mesh_terms: D019175:DNA Methylation; D018744:DNA, Plant / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics*; D004171:Diploidy; D020902:Hypericum / Q000235:genetics*; D011123:Polyploidy
chemical_list: D018744:DNA, Plant; D004275:DNA, Ribosomal