Recombination: Meiotic Recombination in Fungi

Röhr, Heike; Ståhl, Ulf; Kües, Ursula

doi:10.1007/978-3-642-60458-4_13

Cited by 3 publications

(4 citation statements)

References 311 publications

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“…Synchronization of karyogamy and meiosis occurs through light impulses (286,324) and is thought to be a consequence of spore liberation by autodigestion of the cap, since this limits the time during which mature basidiospores can be produced on the gills (53,55). This unique property of synchronizing basidial development has made the fungus a classical object for studying meiosis (100,283,389,391,419). Each mushroom cap contains 10 7 to 10 8 meiotic cells (404), which provides sufficient material for cytological and biochemical analysis at any stage.…”

Section: Developmental Processes In the Basidiamentioning

confidence: 99%

“…Their correction is completed by breakage-reunion before mid-to late pachytene (175), when DNA repair synthesis occurs extensively (286). Recombination nodules, small, dense proteinaceous structures connected to chiasmata and recombination processes (283,326,419,534), are readily identified in the central region of the SC (Fig. 11).…”

Section: Developmental Processes In the Basidiamentioning

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: Developmental Processes In the Basidiamentioning

confidence: 99%

Section: Developmental Processes In the Basidiamentioning

confidence: 99%

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Kües

2000

Microbiol Mol Biol Rev

435

336

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“…Species within the genus Lentinula , and in fact most Basidiomycete fungi, exist in the dikaryotic state during vegetative growth 14 . This is a life stage where each cell is home to two nuclei, one from each of the parental strains.…”

Section: Introductionmentioning

confidence: 99%

“…In brief, during meiosis homologous chromosomes pair, replicate, then separate. The pairing of homologous chromosomes allows for crossing-over events in which genetic material is exchanged between them 14 . This crossing-over is one of the sources of genetic variation derived through sexual recombination.…”

Section: Introductionmentioning

confidence: 99%

Macrosynteny analysis between Lentinula edodes and Lentinula novae-zelandiae reveals signals of domestication in Lentinula edodes

Smith

2021

Sci Rep

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The basidiomycete fungus Lentinula novae-zelandiae is endemic to New Zealand and is a sister taxon to Lentinula edodes, the second most cultivated mushroom in the world. To explore the biology of this organism, a high-quality chromosome level reference genome of L. novae-zelandiae was produced. Macrosyntenic comparisons between the genome assembly of L. novae-zelandiae, L. edodes and a set of three genome assemblies of diverse species from the Agaricomycota reveal a high degree of macrosyntenic restructuring within L. edodes consistent with signal of domestication. These results show L. edodes has undergone significant genomic change during the course of its evolutionary history, likely a result of its cultivation and domestication over the last 1000 years.

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Bogdanov

2003

Russian Journal of Genetics

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Recombination: Meiotic Recombination in Fungi

Cited by 3 publications

References 311 publications

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Life History and Developmental Processes in the BasidiomyceteCoprinus cinereus

Macrosynteny analysis between Lentinula edodes and Lentinula novae-zelandiae reveals signals of domestication in Lentinula edodes

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