title: Divergent RNA editing frequencies in hornwort mitochondrial nad5 sequences.
abstract: Hornwort mitochondrial genomes have some of the highest rates of RNA editing among plants. Comparison of eleven partial mitochondrial nad5 genomic and cDNA sequences from diverse taxa of hornworts reveal 125 edited sites in only 1107 nt. No single sample exhibits more than half of these sites. Ten of the 11 hornwort taxa have between 35 and 54 edited sties each; whereas, the eleventh taxon, Leiosporoceros, which represents a potential sister taxa to all other hornworts, has only eight sites. Comparison of multiple cDNA sequences from several individuals reveals the presence of many immature transcripts showing the heterogonous nature of the progression of editing. Phylogenetic analyses of hornwort genomic and cDNAs sequences reveal that 65 of the 94 phylogenetically informative sites within the hornwort clade are edited positions.
authors.affiliation: Department of Biology, 185 South Forge Street, University of Akron, Akron OH 44325-3908, USA. rjduff@uakron.edu
authors.forename: R Joel
authors.initials: RJ
authors.lastname: Duff
mesh_terms: D049936:Anthocerotophyta / Q000235:genetics*; D018076:DNA, Complementary / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics*; D018745:Genome, Plant / Q000235:genetics*; D024101:Mitochondrial Proteins / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D017393:RNA Editing / Q000235:genetics*; D017422:Sequence Analysis, DNA / Q000379:methods
chemical_list: D018076:DNA, Complementary; D004272:DNA, Mitochondrial; D024101:Mitochondrial Proteins; D010940:Plant Proteins