A review of the structure and organization of the mitochondrial genome of higher plants

Lonsdale, David

doi:10.1007/bf00029655

Cited by 87 publications

(21 citation statements)

References 36 publications

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“…Recombinationally active repeats have been characterized in a number of plant mtDNAs, most notably those of wheat [14,15,20], maize [22,23], and Brassica [32,33]. The discovery of such repeats has prompted a model of a multipartite plant mitochondrial genome, in which the entire sequence complexity is contained within a single circular molecule (the "master chromosome") that may be resolved into a number of subgenomic circular molecules by homologous recombination between direct repeats in the master circle [21,33,34].…”

Section: Introductionmentioning

confidence: 99%

Multiple sequence rearrangements accompanying the duplication of a tRNAPro gene in wheat mitochondrial DNA

1988

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In the course of isolating tRNA genes from wheat mtDNA, we have found the same tRNA(Pro) gene in two different Hind III restriction fragments, H-P1 (0.7 kbp) and H-P2 (1.7 kbp). Sequences immediately flanking these duplicate genes are closely related, although not identical; sequence comparisons suggest that multiple rearrangements have occurred in the vicinity of the H-P2 tRNA(Pro) gene, relative to the H-P1 version. The chimeric nature of H-P2 is emphasized by the presence of sequences that are also found upstream of the wheat mitochondrial 26S rRNA gene, as well as sequences derived from chloroplast DNA. Comparison of H-P2 with H-P1 plus upstream sequences provides some insight into possible molecular events that might have generated H-P2. In particular, such comparisons suggest a model in which the homologous sequences in H-P2 are seen to be derived from H-P1 plus upstream sequences as a result of an intragenomic, site-specific rearrangement event, followed by amplification of the product, its fixation in the mitochondrial genome, and subsequent sequence divergence (single base changes as well as insertions/deletions of up to 50 nucleotides). The results reported here implicate particular primary sequence motifs in certain of the rearrangements that characterize H-P2.

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Section: Introductionmentioning

confidence: 99%

Multiple sequence rearrangements accompanying the duplication of a tRNAPro gene in wheat mitochondrial DNA

1988

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“…Although the coding capacity of mitochondria is quite limited in fungi and animals, the mitochondrial genomes of higher plants are considerably larger, ranging from 218 kilobases (kb) in Brassica (2) to 2500 kb in muskmelon (3), with the maize genome estimated to be approximately 570 kb (4). This larger genome of plants does encode at least one additional protein, the a subunit of the F1 ATPase (5,6), which is encoded in the nucleus of fungi and animals (1).…”

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confidence: 99%

Maize mitochondria synthesize organ-specific polypeptides.

Newton¹,

Walbot²

1985

Proc. Natl. Acad. Sci. U.S.A.

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We detected both quantitative and qualitative organ-specific differences in the total protein composition of mitochondria of maize. Labeling ofisolated mitochondria from each organ demonstrated that a few protein differences are due to changes in the polypeptides synthesized by the organelle. The synthesis of developmental stage-specific mitochondrial polypeptides was found in the scutella of developing and germinating kernels. The approximately 13-kDa polypeptide synthesized by mitochondria from seedlings of the Texas (T) male-sterile cytoplasm was shown to be constitutively expressed in all organs of line B37T tested. Methomyl, an insecticide known to inhibit the growth of T sterile plants, was shown to be an effective inhibitor of protein synthesis in mitochondria from T plants.

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“…Repeated sequences have been associated with sites of recombination in the mitochondrial genome in other plant species (20,21). Such recombination events can result in subgenomic circles that contain portions of the complete mitochondrial genome (22). The submolar stoichiometry of the 6.0-kb Pst I fragment suggests that it may reside on a molecule distinct from the master mitochondrial genome.…”

Section: Discussionmentioning

confidence: 99%

Mitochondrial DNA rearrangement associated with fertility restoration and cytoplasmic reversion to fertility in cytoplasmic male sterile Phaseolus vulgaris L

Mackenzie

Pring

Bassett

et al. 1988

Proc. Natl. Acad. Sci. U.S.A.

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GeneticsMitochondrial DNA rearrangement associated with fertility restoration and cytoplasmic reversion to fertility in cytoplasmic male sterile Phaseolus vulgaris L. ABSTRACTRestoration of pollen fertility to cytoplasmic male sterile (CMS) Phaseolus vulgaris by a nuclear restorer gene provides a system for studying nuclear-cytoplasmic interactions. Introduction of a nuclear restorer gene to this CMS line of P. vulgaris (CMS-Sprite) results in a mitochondrial genome rearrangement similar to that observed upon spontaneous cytoplasmic reversion to fertility. Three spontaneous heritable cytoplasmic revertants were derived from CMS-Sprite. Five fully fertile restored lines were also produced by using restorer line R-351 (BC3F3 populations).Comparison of the mitochondrial DNA restriction patterns of CMS-Sprite, the three fertile revertants, and the five restored lines revealed loss of a 6.0-kilobase (kb) Pst I fragment in all restored and revertant lines. Southern hybridizations with a 1.3-kb BamHI clone, internal to the 6.0-kb Pst I fragment, as a probe revealed two configurations of 6.0-kb homologous sequences in the sterile cytoplasm; one of the configurations was lost upon reversion or restoration. Mitochondrial DNA rearrangement has thus been observed upon restoration by a nuclear restorer gene in this CMS system.

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A review of the structure and organization of the mitochondrial genome of higher plants

Cited by 87 publications

References 36 publications

Multiple sequence rearrangements accompanying the duplication of a tRNAPro gene in wheat mitochondrial DNA

Multiple sequence rearrangements accompanying the duplication of a tRNAPro gene in wheat mitochondrial DNA

Maize mitochondria synthesize organ-specific polypeptides.

Mitochondrial DNA rearrangement associated with fertility restoration and cytoplasmic reversion to fertility in cytoplasmic male sterile Phaseolus vulgaris L

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