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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Cell type-specific loss of atp6 RNA editing in cytoplasmic male sterile Sorghum bicolor.

RNA editing and cytoplasmic male sterility are two important phenomena in higher plant mitochondria. To determine whether correlations might exist between the two, RNA editing in different tissues of Sorghum bicolor was compared employing reverse transcription-PCR and subsequent sequence analysis. In etiolated shoots, RNA editing of transcripts of plant mitochondrial atp6, atp9, nad3, nad4, and rps12 genes was identical among fertile or cytoplasmic male sterile plants. We then established a protocol for mitochondrial RNA isolation from plant anthers and pollen to include in these studies. Whereas RNA editing of atp9, nad3, nad4, and rps12 transcripts in anthers was similar to etiolated shoots, mitochondrial atp6 RNA editing was strongly reduced in anthers of the A3Tx398 male sterile line of S. bicolor. atp6 transcripts of wheat and selected plastid transcripts in S. bicolor showed normal RNA editing, indicating that loss of atp6 RNA editing is specific for cytoplasmic male sterility S. bicolor mitochondria. Restoration of fertility in F1 and F2 lines correlated with an increase in RNA editing of atp6 transcripts. Our data suggest that loss of atp6 RNA editing contributes to or causes cytoplasmic male sterility in S. bicolor. Further analysis of the mechanism of cell type-specific loss of atp6 RNA editing activity may advance our understanding of the mechanism of RNA editing.[1]


  1. Cell type-specific loss of atp6 RNA editing in cytoplasmic male sterile Sorghum bicolor. Howad, W., Kempken, F. Proc. Natl. Acad. Sci. U.S.A. (1997) [Pubmed]
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