Recombination:Organelle DNA of Plants and Fungi: Inheritance and Recombination

Röhr, Heike; Kües, Ursula; Ståhl, Ulf

doi:10.1007/978-3-642-59940-8_2

Cited by 26 publications

(11 citation statements)

References 267 publications

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“…Usually, such mixed dikaryotic mycelia rapidly segregate for one mitochondrial type. Although mitochondrial inheritance in C. cinereus is basically uniparental, recombined mitochondrial DNA is occasionally found in places of hyphal anastomosis (23,75,117,118,306; for a recent review of mitochondrial inheritance and recombination, see reference 420).…”

Section: Monokaryons and Dikaryonsmentioning

confidence: 99%

“…Meiosis, on the other hand, has been postulated to be an evolutionary consequence of the selfish behavior of mitochondria that use meiosis to distribute within populations (181). It is probably not an accident that genes encoding mitochondrial functions have been kept in close proximity to mating-type genes or directly incorporated into mating-type loci in various organisms (420), including C. cinereus (81). Following hyphal fusion, mitochondria are not exchanged between two mycelia of C. cinereus.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

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Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Kües

2000

Microbiol Mol Biol Rev

435

336

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SUMMARY Coprinus cinereus has two main types of mycelia, the asexual monokaryon and the sexual dikaryon, formed by fusion of compatible monokaryons. Syngamy (plasmogamy) and karyogamy are spatially and temporally separated, which is typical for basidiomycetous fungi. This property of the dikaryon enables an easy exchange of nuclear partners in further dikaryotic-monokaryotic and dikaryotic-dikaryotic mycelial fusions. Fruiting bodies normally develop on the dikaryon, and the cytological process of fruiting-body development has been described in its principles. Within the specialized basidia, present within the gills of the fruiting bodies, karyogamy occurs in a synchronized manner. It is directly followed by meiosis and by the production of the meiotic basidiospores. The synchrony of karyogamy and meiosis has made the fungus a classical object to study meiotic cytology and recombination. Several genes involved in these processes have been identified. Both monokaryons and dikaryons can form multicellular resting bodies (sclerotia) and different types of mitotic spores, the small uninucleate aerial oidia, and, within submerged mycelium, the large thick-walled chlamydospores. The decision about whether a structure will be formed is made on the basis of environmental signals (light, temperature, humidity, and nutrients). Of the intrinsic factors that control development, the products of the two mating type loci are most important. Mutant complementation and PCR approaches identified further genes which possibly link the two mating-type pathways with each other and with nutritional regulation, for example with the cAMP signaling pathway. Among genes specifically expressed within the fruiting body are those for two galectins, β-galactoside binding lectins that probably act in hyphal aggregation. These genes serve as molecular markers to study development in wild-type and mutant strains. The isolation of genes for potential non-DNA methyltransferases, needed for tissue formation within the fruiting body, promises the discovery of new signaling pathways, possibly involving secondary fungal metabolites.

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Section: Monokaryons and Dikaryonsmentioning

confidence: 99%

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Kües

2000

Microbiol Mol Biol Rev

435

336

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“…The chloroplast genome is assumed to be maternally inherited in S. purpurea, as it is maternally inherited in most angiosperms (51,52). Cycling conditions were 94°C (5 min); then for 30 cycles 94°C (1 min), 55°C (45 s), 72°C (1 min), and a final extension at 72°C (5 min).…”

Section: Methodsmentioning

confidence: 99%

Domestication of a Mesoamerican cultivated fruit tree, Spondias purpurea

Miller

Schaal

2005

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

110

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Contemporary patterns of genetic variation in crops reflect historical processes associated with domestication, such as the geographic origin(s) of cultivated populations. Although significant progress has been made in identifying several global centers of domestication, few studies have addressed the issue of multiple origins of cultivated plant populations from different geographic regions within a domestication center. This study investigates the domestication history of jocote (Spondias purpurea), a Mesoamerican cultivated fruit tree. Sequences of the chloroplast spacer trnG-trnS were obtained for cultivated and wild S. purpurea trees, two sympatric taxa (Spondias mombin var. mombin and Spondias radlkoferi), and two outgroups (S. mombin var. globosa and Spondias testudinus). A phylogeographic approach was used and statistically significant associations of clades and geographical location were tested with a nested clade analysis. The sequences confirm that wild populations of S. purpurea are the likely progenitors of cultivated jocote trees. This study provides phylogeographic evidence of multiple domestications of this Mesoamerican cultivated fruit tree. Haplotypes detected in S. purpurea trees form two clusters, each of which includes alleles recovered in both cultivated and wild populations from distinct geographic regions. Cultivated S. purpurea populations have fewer unique trnG-trnS alleles than wild populations; however, five haplotypes were absent in the wild. The presence of unique alleles in cultivation may reflect contemporary extinction of the tropical dry forests of Mesoamerica. These data indicate that some agricultural habitats may be functioning as reservoirs of genetic variation in S. purpurea.crop origins ͉ Mesoamerica ͉ phylogeography ͉ genetic variation

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“…Since the chloroplast genome is largely maternally transmitted in angiosperms (Sears, 1980;Corriveau and Coleman, 1988;Zhang et al, 2003), these types of applications assume maternal inheritance (Birky, 1995(Birky, , 2001, though this assumption is only rarely tested. In fact, occasional paternal or biparental inheritance has been shown in some species (Sears, 1980;Corriveau and Coleman, 1988;Reboud and Zeyl, 1994;Rö hr et al, 1998;Hansen et al, 2007;McCauley et al, 2007). Thus, when it occurs, paternal or biparental inheritance of the chloroplast genome could lead to incorrect conclusions in studies involving seed dispersal, hybrid origins and evolutionary relationships should maternal inheritance be assumed.…”

Section: Introductionmentioning

confidence: 99%

Detection of rare paternal chloroplast inheritance in controlled crosses of the endangered sunflower Helianthus verticillatus

2008

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A variety of questions in population and evolutionary biology are studied using chloroplast DNA (cpDNA). The presumed maternal inheritance in angiosperms allows for certain assumptions and calculations to be made when studying plant hybridization, phylogeography, molecular systematics and seed dispersal. Further, the placement of transgenes in the chloroplast to lessen the probability of 'escape' to weedy relatives has been proposed since such genes would not move through pollen. In many studies, however, strict maternal inheritance is assumed but not tested directly, and some studies may have sample sizes too small to be able to detect rare paternal leakage. Here, we study the inheritance of cpDNA simple sequence repeats in 323 offspring derived from greenhouse crosses of the rare sunflower Helianthus verticillatus Small. We found evidence for rare chloroplast paternal leakage and heteroplasmy in 1.86% of the offspring. We address the question of whether one can extrapolate the mode of chloroplast transmission within a genus by comparing our results to the findings of another sunflower species study. The findings of occasional paternal transmission of the chloroplast genome are discussed in the framework of using these markers in studies of population and evolutionary biology both in Helianthus and other angiosperms.

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Recombination:Organelle DNA of Plants and Fungi: Inheritance and Recombination

Cited by 26 publications

References 267 publications

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Domestication of a Mesoamerican cultivated fruit tree, Spondias purpurea

Detection of rare paternal chloroplast inheritance in controlled crosses of the endangered sunflower Helianthus verticillatus

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