Mitochondrial Genome Organization and Expression in Plants

Abstract

The higher plant mitochondrial genome contains in the order of 50 proteins coding genes scattered throughout the genome and while much of the genome is transcribed, regulatory control is primarily exercised posttranscriptionally at the level of the ribonucleic acid (RNA) or protein turnover. In some plant species aberrant recombination events in the mitochondrial genome generate novel open reading frames, expressed as variant polypeptides, which in some cases lead to failure to produce functional pollen, a trait that has been exploited in plant breeding to produce F1 hybrid crops.

Keywords: plant mitochondria; genome structure; posttranscriptional processing; RNA editing

References

Forde BG and Leaver CJ (1980) Nuclear and cytoplasmic genes controlling synthesis of variant mitochondrial polypeptides in male‐sterile maize. Proceedings of the National Academy of Sciences of the USA 77: 418–422.

Gagliardi D, Perrin R, Marechal‐Drouard L, Grienenberger J‐M and Leaver CJ (2001) Plant mitochondrial polyadenylated mRNAs are degraded by a 3′ to 5′ exoribonuclease activity which proceeds unimpeded by stable secondary structures. Journal of Biological Chemistry 276: 43541–43547.

Giegé P, Sweetlove LJ, Cognat V and Leaver CJ (2005) Coordination of nuclear and mitochondrial genome expression during mitochondrial biogenesis in Arabidopsis. The Plant Cell 17: 1497–1512.

Knoop V (2004) The mitochondrial DNA of land plants: peculiarities in phylogenetic perspective. Current Genetics 46: 123–139.

Lister R, Hulett JM, Lithgow T and Whelan J (2005) Protein import into mitochondria: origins and functions today. Molecular Membrane Biology 22: 87–100.

Okada S and Brennicke A (2006) Transcript levels in plant mitochondria show a tight homeostasis during day and night. Molecular Genetics and Genomics 276: 71–78.

Small ID and Peeters N (2000) The PPR motif – a TPR‐related motif prevalent in plant organellar proteins. Trends in Biochemical Sciences 25: 46–47.

Unseld M, Marienfeld J, Brandt P and Brennicke A (1997) The mitochondrial genome in Arabidopsis thaliana contains 57 genes in 366,924 nucleotides. Nature Genetics 15: 57–61.

van der Merwe JA, Takenaka M, Neuwirt J, Verbitskiy D and Brennicke A (2006) RNA editing sites in plant mitochondria can share cis‐elements. FEBS Letters 580: 268–272.

Further Reading

Binder S and Brennicke A (2003) Gene expression in plant mitochondria: transcriptional and posttranscriptional control. Philosophical Transactions of the Royal Society London B 358: 181–189.

Covello PS and Gray MW (1993) On the evolution of RNA editing. Trends in Genetics 9: 265–268.

Knoop V and Brennicke A (2002) Molecular Biology of the plant mitochondrion. CRC Reviews in Plant Science 21: 111–126.

Oda K, Yamato K, Ohta E et al. (1992) Gene organization deduced from the complete sequence of liverwort Marchantia polymorpha mitochondrial DNA: a primitive form of plant mitochondrial genome. Journal of Molecular Biology 223: 1–7.

Small ID and Peeters N (2000) The PPR motif ‐ a TPR‐related motif prevalent in plant organellar proteins. Trends in Biochemical Sciences 25: 46–47.

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How to Cite close
Brennicke, Axel, and Leaver, Christopher J(Jan 2007) Mitochondrial Genome Organization and Expression in Plants. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1002/9780470015902.a0003825]