NDLI: Ecotype Allelic Variation in C-to-U Editing Extent of a Mitochondrial Transcript Identifies RNA-Editing Quantitative Trait Loci in Arabidopsis1

Content Provider	PubMed Central
Author	Stéphane, Bentolila Chateigner-boutin, Anne-laure Hanson, Maureen R.
Copyright Year	2005
Abstract	In higher plants, RNA editing is a posttranscriptional process that converts C to U in organelle mRNAs. Although RNA editing in mitochondria occurs much more frequently than in chloroplasts, editing of exogenously supplied RNA substrates in vitro and in organello has shown that editing in the two organelles shares some common features. In particular, the 20 nucleotides upstream of the editing site play an important role in specifying the C to be edited. Biochemical approaches have allowed the identification of features of cis-sequences necessary for RNA editing to occur, but have failed to identify any of the components of the mitochondrial editing machinery. In order to implement a genetic approach for identification of editing factors, we have identified a polymorphism in the editing efficiency of a mitochondrial site between two ecotypes of Arabidopsis (Arabidopsis thaliana), Columbia (Col) and Landsberg erecta (Ler). In rosette leaves, an editing site within the ccb206 mitochondrial gene is more highly edited in Col than in Ler. Depending on the development stage and tissue analyzed, the difference in editing extent varies between the two ecotypes; for example, in floral buds, editing extent does not differ. Single-point regression analysis of the editing efficiency in a sample of recombinant inbred lines derived from a cross between Col and Ler allowed the identification of two quantitative trait loci controlling this trait. A member of the pentatricopeptide repeat protein family that carries a putative mitochondrial transit sequence has been identified near a major quantitative trait locus on chromosome 4.
Related Links	http://dx.doi.org/10.1104/pp.105.069013
Ending Page	2016
Page Count	11
Starting Page	2006
File Format	PDF
ISSN	00320889
e-ISSN	15322548
Journal	Plant Physiology
Issue Number	4
Volume Number	139
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2005-12-01
Access Restriction	Open
Rights Holder	American Society of Plant Biologists
Subject Keyword	Plant Science Genetics Physiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics Physiology Plant Science

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