Parasexual Cycle
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Vegetative compatibility and heterokaryon formation between different isolates of Colletotrichum lindemuthianum by using the nit mutant system
Colletotrichum lindemuthianum, the causative agent of bean anthracnose, is one of the most common pathogens leading to expressive damage to plants beyond presenting noticeable variability. The knowledge on vegetative compatibility groups (VCGs) is of particular interest in asexual fungi as they subdivide the population in groups that can exchange genetic inf
Brazilian Journal of Microbiology. Publicado em: 2011-03
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2. Genetic and cytological characterization of the somatic recombination in Trichoderma pseudokoningii. / Caracterização genética e citológica da recombinação somática em Trichoderma pseudokoningii.
Com o objetivo de se caracterizar o processo de recombinação somática em Trichoderma pseudokoningii foram feitos cruzamentos via anastomose de hifas entre duas linhagens contrastantes para quatro marcadores de auxotrofia, coloração dos conídios e marcadores de RAPD. Foram feitos quatro cruzamentos, sendo analisados um total de 1052 colônias obtidas a
Publicado em: 2002
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3. The genetic study of sterigmatocystin production in Aspergillus nidulans. / Estudo genético da produção de esterigmatocistina em Apergillus nidulans.
Sterigmatocystin (ST) is a polyketide produced by different species of Aspergillus as well as by other fungus genera such as Bipolaris and Chaetomium. This toxin is characterized as a bifuranoxanthone, whose molecular formula is C18H12O6 and which is frequently found as a contaminant in several food products such as oil-seed grains and cereals. It has carcin
Publicado em: 1999
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4. Parassexualidade e produção de destruxinas em linhagens de metarhizim anisopliae var. anisopliae (Metsch.) sorokin
In this work the main object was the study of destruxlns production, by diploids and segregants obtained through parasexual cycle in Metarhizium anisopliae. The two parantal strains utilized were E-9 (Brazil) and F-84 (USA), which after induction with UV-radiation produced conidial color and auxotrophic mutants. The mutants E-9 am-pir, F-84 vio-tia and F-84
Publicado em: 1988
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5. Completion of a parasexual cycle in Candida albicans by induced chromosome loss in tetraploid strains
The human pathogenic fungus Candida albicans has traditionally been classified as a diploid, asexual organism. However, mating-competent forms of the organism were recently described that produced tetraploid mating products. In principle, the C.albicans life cycle could be completed via a sexual process, via a parasexual mechanism, or by both mechanisms. Her
Oxford University Press.
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6. Heterocaryosis and the Parasexual Cycle in Aspergillus Fumigatus
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7. Genetics of Phytopathogenic Fungi. Xiv. the Parasexual Cycle in PENICILLIUM EXPANSUM
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8. Parasexual genetic analysis of Candida albicans by spheroplast fusion.
Doubly auxotrophic strains of Candida albicans were selected from mutagenized cultures. Spheroplasts prepared from the auxotrophic strains were fused with polyethylene glycol. Prototrophic derivatives formed by this fusion protocol from auxotrophic strains were selected by complementation on minimal medium. These prototrophs had a cell volume twice that of t
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9. Induced parasexual processes in Claviceps sp. strain SD58.
A homokaryotic, clavine alkaloid-producing strain of ergot, Claviceps sp. strain SD 58, was used in an attempt to demonstrate parasexuality. Genetically marked auxotrophic strains were produced by mutation with N-methyl-N'-nitro-N-nitrosoguanidine. Protoplast fusion of pairs of unlike doubly auxotrophic strains and isolation of stable prototrophic fusion pro
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10. Parasexual Genetic Analysis of the Cellular Slime Mold DICTYOSTELIUM DISCOIDEUM A3
Haploid strain A3 of the cellular slime mold Dictyostelium discoideum is valuable for biochemical studies because it is capable of axenic growth. Mutants of A3 temperature-sensitive for growth and resistant to the drugs cycloheximide, acriflavin, or methanol were isolated.—Heterozygous diploid recombinants, formed at low frequency by cell and nuclear fusio
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11. Inheritance of extrachromosomal ribosomal DNA during the asexual life cycle of Dictyostelium discoideum: examination by use of DNA polymorphisms.
Wild-type isolates of Dictyostelium discoideum exhibited differences in the size of restriction fragments of the extrachromosomal 88-kilobase ribosomal DNA (rDNA) palindrome. Polymorphisms in rDNA also were found among strains derived solely from the NC4 wild-type isolate. These variations involved EcoRI fragments II, III, and V; they included loss of the Ec
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12. Genetics of Candida albicans.
Candida albicans is among the most common fungal pathogens. Infections caused by C. albicans and other Candida species can be life threatening in individuals with impaired immune function. Genetic analysis of C. albicans pathogenesis is complicated by the diploid nature of the species and the absence of a known sexual cycle. Through a combination of parasexu