Basidia
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Basidiosporogênese em Agaricus brasiliensis / Basidiosporogenesis in Agaricus brasiliensis
O cogumelo Agaricus brasiliensis S. Wasser et al. é um fungo nativo do Brasil que apresenta grande perspectiva de utilização e consumo devido às suas propriedades nutricionais e medicinais, entretanto, estudos sobre a biologia básica da espécie são escassos. Este trabalho teve por objetivo estudar o processo de basidiosporogênese e a variação do n�
Publicado em: 2009
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2. Light microscopy of basidia, basidiospores, and nuclei in spores and hyphae of Filobasidiella neoformans (Cryptococcus neoformans).
Three hypha-forming strains of Cryptococcus neoformans were induced to form basidia and basidiospores. Light microscopy showed that basidia formed at the ends of terminal hyphal cells and were able to produce from a few to many basidiospores. The morphology of the sexual structures indicated that these strains belonged to the recently described perfect state
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3. Study on development of Agaricus bisporus by fluorescent microscopy and scanning electron microscopy.
Two strains of Agaricus bisporus have been investigated by fluorescent microscopy and scanning electron microscopy. Somatic nuclei, stained with auramin O and examined by fluorescent microscopy, appear to be randomly distributed, divide asynchronously, and assume a nonclassical or "two-track" configuration during mitotic metaphase. A similar configuration ha
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4. Localization of Acid Phosphatase Activity in the Basidia of Coprinus micaceus
Gill lamellae from the young fruiting bodies of the basidiomycete Coprinus micaceus possess cytoplasmic particles with cytochemically demonstrable acid phosphatase activity; they are presumed to be lysosomes.
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5. Bsn-t Alleles from French Field Strains of Agaricus bisporus
In the Agaricus bisporus desert population in California, the dominant Bsn-t allele determines the production of tetrasporic basidia and homokaryotic spores (n) that characterize a heterothallic life cycle. Strains belonging to a French population have the Bsn-b/b genotype that results in bisporic basidia that produce heterokaryotic spores (n + n) which char
American Society for Microbiology.
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6. Dark Dependence of Meiosis at Elevated Temperatures in the Basidiomycete Coprinus lagopus
Under continuous-light regimen Coprinus lagopus can enter and complete meiosis at 25 C, but is unable to do so at 35 C. The temperature-sensitive and the dark-dependent period is 10 hr before karyogamy. It is conjectured that the basidia are programmed for the initiation of meiosis during that 10-hr period.
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7. The Rad9 Gene of Coprinus Cinereus Encodes a Proline-Rich Protein Required for Meiotic Chromosome Condensation and Synapsis
The rad9 gene of Coprinus cinereus is essential for the normal completion of meiosis. We examined surface-spread preparations of wild-type and rad9-1 nuclei from the meiotic stages of karyogamy through metaphase I, and we determined the primary sequence, structure, and meiotic expression of the rad9 gene. In wild-type C. cinereus, karyogamy is followed by co
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8. Dimorphism and haploid fruiting in Cryptococcus neoformans: association with the alpha-mating type.
Cryptococcus neoformans is a major opportunistic fungal pathogen in AIDS and other immunosuppressed patients. We have shown that wild-type haploid C. neoformans can develop an extensive hyphal phase under appropriate conditions. Hyphae produced under these conditions are monokaryotic, possess unfused clamp connections, and develop basidia with viable basidio
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9. Multiple roles of Spo11 in meiotic chromosome behavior
Spo11, a type II topoisomerase, is likely to be required universally for initiation of meiotic recombination. However, a dichotomy exists between budding yeast and the animals Caenorhabditis elegans and Drosophila melanogaster with respect to additional roles of Spo11 in meiosis. In Saccharomyces cerevisiae, Spo11 is required for homolog pairing, as well as
Oxford University Press.
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10. Inheritance of Restriction Fragment Length Polymorphisms in Agaricus Brunnescens
The cultivated mushroom, Agaricus brunnescens, is secondarily homothallic; most basidia produce only two basidiospores, each of which receives two of the four post meiotic nuclei. The segregation of restriction fragment length polymorphisms (RFLPs) detected by four plasmid probes carrying single-copy nuclear DNA of Agaricus was followed in seven parental str
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11. Localization of the Mating Type Gene in Agaricus bisporus
The cultivated mushroom Agaricus bisporus is secondarily homothallic. Most basidia produce two basidiospores, each of which receives two of the four postmeiotic nuclei. Usually, the two packaged nuclei carry compatible mating types. Previous studies suggested that there may be only a single mating type locus in A. bisporus. In this study, we determined wheth
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12. Sexual Cycle of Cryptococcus neoformans var. grubii and Virulence of Congenic a and α Isolates
Cryptococcus neoformans is a human-pathogenic fungus that has evolved into three distinct varieties that infect most prominently the central nervous system. A sexual cycle involving haploid cells of a and α mating types has been reported for two varieties (C. neoformans var. neoformans, serotype D, and C. neoformans var. gattii, serotypes B and C), yet the
American Society for Microbiology.