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• W92865863 abstract "Research Article1 January 1994free access Nuclear restoration of cytoplasmic male sterility in sunflower is associated with the tissue-specific regulation of a novel mitochondrial gene. F. Monéger F. Monéger Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author C.J. Smart C.J. Smart Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author C.J. Leaver C.J. Leaver Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author F. Monéger F. Monéger Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author C.J. Smart C.J. Smart Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author C.J. Leaver C.J. Leaver Department of Plant Sciences, University of Oxford, UK. Search for more papers by this author Author Information F. Monéger1, C.J. Smart1 and C.J. Leaver1 1Department of Plant Sciences, University of Oxford, UK. The EMBO Journal (1994)13:8-17https://doi.org/10.1002/j.1460-2075.1994.tb06230.x PDFDownload PDF of article text and main figures. ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InMendeleyWechatReddit Figures & Info We have previously shown that cytoplasmic male sterility in sunflower is associated with the insertion into the mitochondrial DNA of a novel open reading frame (ORF) located 3′ to the atpA gene. Here, we show that in mitochondria from the sterile line, this novel ORF (ORF522) is cotranscribed with atpA. We have identified the product of the ORF522 as being a 15 kDa protein previously observed in sterile plant mitochondria by in organello translation. Both Western blot analysis and in organello translation assays show reduced levels of the 15 kDa polypeptide upon restoration of fertility. Interestingly, this reduction is tissue specific since it is only observed in the male florets from restored hybrid plants. These results suggest that the 15 kDa novel polypeptide is probably responsible for the CMS phenotype. Northern blot analysis using RNA from both seedlings and male florets shows a flower-specific reduction in the level of the ORF522 transcript in the restored hybrid line. The reduction is not due to a reduced transcription rate as demonstrated by ‘run-on’ experiments using mitochondria isolated from male florets. This suggests that the product of the nuclear restorer gene acts at the post-transcriptional level to destabilize the novel mitochondrial transcript in a tissue-specific manner and restore male fertility. Previous ArticleNext Article Volume 13Issue 11 January 1994In this issue RelatedDetailsLoading ..." @default.
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• W92865863 title "Nuclear restoration of cytoplasmic male sterility in sunflower is associated with the tissue-specific regulation of a novel mitochondrial gene." @default.
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• W92865863 doi "https://doi.org/10.1002/j.1460-2075.1994.tb06230.x" @default.
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