Transmission of mitochondrial DNA in Ustilago violacea

Wilch, Gerhard; Ward, Steven; Castle, Alan J.

doi:10.1007/bf00351473

Cited by 33 publications

(21 citation statements)

References 36 publications

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“…The number of mating types is then maintained down to two, except in rare cases where a complex hierarchy has been established between several mating types (Hurst and Hamilton 1992). Interestingly, mitochondria are in fact transmitted by one of the mating types, in Microbotryum (Wilch et al 1992;and our unpublished data) and in other fungi (Barr et al 2005). Other hypotheses for why the number of mating types does not increase despite balancing selection include the existence of sheltered load (Uyenoyama 2005).…”

Section: Discussionmentioning

confidence: 77%

Ancient Trans-specific Polymorphism at Pheromone Receptor Genes in Basidiomycetes

et al. 2009

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In the majority of sexual organisms, reproduction occurs almost exclusively through the combination of distinct and alternate forms, called sexes or mating types. In some fungi, there can be dozens to hundreds of alternate alleles that determine compatible mating types. Such extensive polymorphism is expected to be maintained by balancing selection, and in extreme cases may give rise to trans-specific polymorphism. Here, we analyzed sequences of two pheromone receptors in the Microbotryum fungal species complex (Basidiomycota), which has only two alternate mating types. Several lines of evidence strongly suggest that the pheromone receptors are two allelic sequences acting to determine the alternate A1 and A2 mating types required for mating in Microbotryum. Phylogenetic trees of pheromone receptors in the Microbotryum species complex indicated a trans-specific polymorphism: the Microbotryum sequences from a given mating type were all more similar to the pheromone receptors of distantly related classes of fungi than to the alternate pheromone receptor in the Microbotryum species. A phylogenetic tree built using other known pheromone receptors from basidiomycetes showed that trans-specific polymorphism is widespread. The pheromone receptor alleles from Microbotryum appeared as the oldest, being at least 370 million years old. This represents the oldest known trans-specific polymorphism known in any organism so far, which may be due to the existence of sex chromosomes, obligate sexuality, mitochondrial inheritance linked to the mating type, and a highly selfing mating system in Microbotryum.

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Section: Discussionmentioning

confidence: 77%

Ancient Trans-specific Polymorphism at Pheromone Receptor Genes in Basidiomycetes

et al. 2009

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“…During this sequence, the extranuclear genomes, including mtDNAs, generally do not recombine, because of their strict uniparental inheritance (Birky 1978(Birky , 1983(Birky , 1994. Most fungi and other eukaryotic microbes are characterised by predominantly maternal inheritance of their cytoplasmic DNAs, as has been reported in many cases (Rowlands and Turner 1976;Brasier and Kirk 1986;Martin 1989;Specht et al 1992;Wilch et al 1992;Lee and Taylor 1993;Whittaker et al 1994;Chung et al 1996;Coenen et al 1996). There are only a few exceptions known where paternal inheritance of extranuclear genomes also occurs.…”

Section: Introductionmentioning

confidence: 90%

Recombination of mitochondrial DNAs following transmission of mitochondria among incompatible strains of black Aspergilli

Kevei¹,

Töth²,

Coenen

et al. 1997

Mol Gen Genet

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Successful intra- and interspecific mitochondrial transfers were performed by polyethylene glycol (PEG)-induced protoplast fusion among incompatible strains belonging to the Aspergillus niger species aggregate. The mitochondrial DNAs (mtDNAs) of the strains examined were of three main types based on their restriction fragment length polymorphism (RFLP) profiles. mtDNA types 1 and 2 correspond to A. niger and A. tubingensis species, respectively, while type 3 is represented by some Brazilian wild-type isolates (possibly a distinct species or subspecies). mtDNA types 1 and 2 could be further divided into several subgroups (1a-1e and 2a-2f). All these strains, representing different RFLP groups or subgroups, were fully incompatible with respect to nuclear complementation. The transfer experiments were carried out under selection pressure, using a mitochondrial oligomycin-resistant mutant of mtDNA type 1a as donor. Following fusion mitochondrial oligomycin-resistant progenies were recovered in the presence of oligomycin by selecting for the nuclear phenotypes of the oligomycin-sensitive recipient strains. All attempted transfers were successful, and resulted in different varieties of resistant recombinant mitochondrial progenies at various frequencies. Within the group of strains of mtDNA type 1, the transfer of oligomycin-resistant mitochondria resulted in the appearance of a single recombinant type of RFLP profile in each case. The recombination events were more complex when the transfer of oligomycin resistance occurred between strains representing different species (mtDNA groups 1a-->2 and 1a-->3). A great variety of recombinant mtDNA RFLP profiles appeared. Explanation for this phenomenon are discussed on the basis of preliminary physical mapping data.

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“…Biparental inheritance has called into question the strictness of maternal inheritance, leading to an energetic debate (Barr et al 2005). Uniparental inheritance of mitochondria has been observed in the fungi Microbotryum violaceum (Wilch et al 1992) and Schizophyllum commune (Specht et al 1992), even though their gametes are almost identical in size (isogamy). Decreases have been observed in the mtDNA of flowering plants (Corriveau and Coleman 1991;Nagata et al 1999).…”

Section: Maternal Inheritance and The Selective Digestion Hypothesis:mentioning

confidence: 98%

Maternal inheritance of mitochondria: multipolarity, multiallelism and hierarchical transmission of mitochondrial DNA in the true slime mold Physarum polycephalum

Moriyama

Kawano

2010

J Plant Res

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Direct evidence of digestion of paternal mitochondrial DNA (mtDNA) has been found in the true slime mold Physarum polycephalum. This is the first report on the selective digestion of mtDNA inside the zygote, and is striking evidence for the mechanism of maternal inheritance of mitochondria. Moreover, two mitochondrial nuclease activities were detected in this organism as-candidates for the nucleases responsible for selective digestion of mtDNA. In the true slime mold, there is an additional-feature of the uniparental inheritance of mitochondria.Although mitochondria are believed to be inherited from the maternal lineage in nearly all eukaryotes, the mating types of the true slime mold P. polycephalum is not restricted to two: there are three mating loci--matA, matB,and matC--and these loci have 16, 15, and 3 alleles,-respectively. Interestingly, the transmission patterns of mtDNA are determined by the matA locus, in a hierarchical-fashion (matA hierarchy) as follows: matA7[matA2[matA11[matA12[matA15/matA16[matA1[matA6.The strain possessing the higher status of matA would be the mtDNA donor in crosses. Furthermore, we have found that some crosses showed biparental inheritance of mitochondria.This review describes the phenomenon of hierarchical transmission of mtDNA in true slime molds, and discusses the presumed molecular mechanism of maternal and biparental inheritance.

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Transmission of mitochondrial DNA in Ustilago violacea

Cited by 33 publications

References 36 publications

Ancient Trans-specific Polymorphism at Pheromone Receptor Genes in Basidiomycetes

Ancient Trans-specific Polymorphism at Pheromone Receptor Genes in Basidiomycetes

Recombination of mitochondrial DNAs following transmission of mitochondria among incompatible strains of black Aspergilli

Maternal inheritance of mitochondria: multipolarity, multiallelism and hierarchical transmission of mitochondrial DNA in the true slime mold Physarum polycephalum

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