Molecular evolution of the trnTUGU-trnFGAA region in Bryophytes

Plant Biology
Dietmar Quandt, Michael Stech

Abstract

Structure, variability, and molecular evolution of the trnT-F region in the Bryophyta (mosses and liverworts) is analyzed based on about 200 sequences of the trnT-L spacer and trnL 5' exon, 1000 sequences of the trnL intron, and 800 sequences of the trnL 3' exon and trnL-F spacer, including comparisons of lengths, GC contents, sequence similarities, and functional elements. Mutations occurring in the trnL 5' and 3' exons, including compensatory base pair changes, and a transition in the trnL anticodon in Takakia lepidozioides, are discussed. All three non-coding regions display a mosaic structure of highly variable elements (V1 - V3 in the trnT-L spacer, V4/V5 corresponding to stem-loop regions P6/P8 in the trnL intron, and V6/V7 in the trnL-F spacer) and more conserved elements. In the trnL intron this structure is a consequence of the defined secondary structure necessary for correct splicing, whereas in both spacers conserved regions are restricted to promoter elements. At least the highly variable regions in the trnT-L spacer and stem-loop region P8 of the trnL intron seem to evolve independently in the major bryophyte lineages and are therefore not suitable for high taxonomic level phylogenetic reconstructions. In mosses, ...Continue Reading

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Citations

Jul 21, 2010·PloS One·Barbara A WhitlockPaul A Groff
Mar 23, 2011·Bioinformation·Sankar JagarlamudiRajasekhar Pinnamaneni
Nov 1, 2008·Molecular Ecology Resources·Chad D WattsScot A Kelchner
Oct 27, 2009·Molecular Phylogenetics and Evolution·Ute WahrmundVolker Knoop
Sep 18, 2004·Plant Biology·D Quandt, M Stech
Aug 10, 2017·Royal Society Open Science·E M BiersmaP Convey
Jul 12, 2005·Molecular Phylogenetics and Evolution·Dietmar Quandt, Michael Stech
Sep 1, 2021·Molecular Phylogenetics and Evolution·Julia BechtelerMartin Nebel
Feb 16, 2010·Molecular Phylogenetics and Evolution·Neil E Bell, Jaakko Hyvönen

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