The nuclear division and parasexual cycle inPenicillium

Fjeld, Asbjørn; Laane, Morten M.

doi:10.1007/bf00958930

Cited by 7 publications

(1 citation statement)

References 29 publications

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“…The parasexual cycle initiates with heterokaryose, occurring through anastomosis of vegetative cells; followed by nuclear fusion, which gives rise to heterozygous diploids putatives and terminates with recombinant production by mitotic recombination and haplodization (6,10,18,19,44). Spontaneous anastosis between different species can be hindered by the vegetative incompatibility among different strains.…”

Section: Introductionmentioning

confidence: 99%

Isolation of recombinant strains with enhanced pectinase production by protoplast fusion between Penicillium expansum and Penicillium griseoroseum

Varavallo¹,

Queiroz²,

Lana³

et al. 2007

Braz. J. Microbiol.

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Protoplast fusion between complementary auxotrophic and morphological mutant strains of Penicillium griseoroseum and P. expansum was induced by polyethylene glycol and calcium ions (Ca 2+ ). Fusant strains were obtained in minimal medium and a prototrophic strain, possibly diploid, was chosen for haplodization with the fungicide benomyl. Different recombinant strains were isolated and characterized for occurrence of auxotrophic mutations and pectinolytic enzyme production. The fusant prototrophic did not present higher pectinase production than the parental strains, but among 29 recombinants analyzed, four presented enhanced enzyme activities. The recombinant RGE27, which possesses the same auxotrophic and morphologic mutations as the P. griseoroseum parental strain, presented a considerable increase in polygalacturonase (3-fold) and pectin lyase production (1.2-fold).

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Section: Introductionmentioning

confidence: 99%

Isolation of recombinant strains with enhanced pectinase production by protoplast fusion between Penicillium expansum and Penicillium griseoroseum

Varavallo¹,

Queiroz²,

Lana³

et al. 2007

Braz. J. Microbiol.

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Ultrastruktur des Kern‐assoziierten Körperchens (“centriolar plaque”, “MTOC”, “KCE”) während der Interphase in der Konidie von Aspergillus nidulans

Künkel

1974

J of Basic Microbiology

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Elektronenmikroskopische Untersuchungen aufgebrochener Konidien von A. nidulans führten nach Glutaraldehyd‐Osmium‐Fixierung zum Nachweis eines Kern‐assoziierten Körperchens (KK) am Interphasekern. Es liegt dem Nucleolus gegenüber in einer Invagination der Kernhülle und besteht aus zwei stärker kontrastierten diskoiden Einheiten, die durch einen schwächer kontrastierten strukturierten Mittelteil verbunden sind. Im Kerninneren, dem KK benachbart, treten elektronendichte Bereiche auf, die mit den diskoiden Einheiten in Verbindung zu stehen scheinen. Eine Verbindung des Mittelteils mit der Kernhülle fehlt. Wiederholt wurde eine Assoziation zwischen dem KK und multivesikulären Körpern beobachtet, deren mögliche Bedeutung diskutiert wird.

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Ultrastruktur des Kern-assoziierten Körperchens (“centriolar plaque”, “MTOC”, “KCE”) während der Interphase in der Konidie vonAspergillus nidulans

Künkel¹

1974

Z Allg Mikrobiol

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The nuclear division and parasexual cycle inPenicillium

Cited by 7 publications

References 29 publications

Isolation of recombinant strains with enhanced pectinase production by protoplast fusion between Penicillium expansum and Penicillium griseoroseum

Isolation of recombinant strains with enhanced pectinase production by protoplast fusion between Penicillium expansum and Penicillium griseoroseum

Ultrastruktur des Kern‐assoziierten Körperchens (“centriolar plaque”, “MTOC”, “KCE”) während der Interphase in der Konidie von Aspergillus nidulans

Ultrastruktur des Kern-assoziierten Körperchens (“centriolar plaque”, “MTOC”, “KCE”) während der Interphase in der Konidie vonAspergillus nidulans

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