Complementation in balanced heterokaryons and heterozygous diploids of Aspergillus nidulans
نویسندگان
چکیده
منابع مشابه
Radiation effects and mitotic recombination in diploids of Aspergillus nidulans.
NTENSE gamma-radiation of conidia has been found to produce a very high I frequenc y of abnormal, sectoring colonies in heterozygous diploids of Aspergillus nidulans (=FER 1960). To obtain information about the nature of the radiation effects which cause the formation of colonies with many large segregant sectors, a detailed analysis of a relatively small number of such sectoring colonies has b...
متن کاملSexual diploids of Aspergillus nidulans do not form by random fusion of nuclei in the heterokaryon.
The sexual stage of Aspergillus (Emericella) nidulans consists of cleistothecia containing asci, each with eight ascospores. The fungus completes the sexual cycle in a homokaryotic or a heterokaryotic mycelium, respectively. The common assumption for the last 50 years was that different nuclear types are not distinguishable when sexual development is initiated. When cultured on a medium limited...
متن کاملPresumptive heterokaryons in Aspergillus fonsecaeus.
Raper and Fennell (1953) studied heterokaryon formation in Aspergillus fonsecaeus Thom and Raper, strain NRRL 67, a carbonaceous black species of the Aspergillus niger group (Thom and Raper, 1945) which produces large multinucleate conidia. Eleven various color, nutritional and morphological mutants (figure. 1) were produced by ultraviolet irradiation of the wild strain. The mutants were paired...
متن کاملAspergillus nidulans
Light-dependent conidiation in the filamentous ascomycete, Aspergillus nidulans, is contingent on the allelic state of the velvet (veA) gene. Light dependence is abolished by a mutation in this gene (veAl) , which allows conidiation to occur in the absence of light. We have isolated and characterized six extragenic suppressors of veAl that restore the light-dependent conidiation phenotype. Alle...
متن کاملMitosis in Aspergillus nidulans.
Mitosis in growing hyphae of haploid and diploid Aspergillus nidulans has been studied with the light microscope in Helly-fixed preparations. At the periphery of the nucleus a sharply defined granule is invariably found which has strong affinity for acid fuchsin. Mitosis begins with the duplication of this granule and the development inside the nucleus of a gradually lengthening fibre between t...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1964
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s001667230000118x