Ultrastructure ofAspergillus nidulans conidia and conidial lomasomes

Weisberg, S. H.; Turian, G.

doi:10.1007/bf01281011

Cited by 24 publications

(5 citation statements)

References 35 publications

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“…,4 variety of multimembrane bodies were observed at this stage, including mitochondria within autophagic vacuoles and, occasionally, lomasome-like bodies resembling those described by Weisberg & Turian (1971). In mature spores normal organelles were found, suggesting that autophagy in the immature spore had reduced the number of organelles without eliminating any type.…”

Section: P T P O L I V E Rmentioning

confidence: 76%

Conidiophore and Spore Development in Aspergillus nidulans

Oliver

1972

Journal of General Microbiology

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S U M M A R YConidiophore development was studied in wild-type and structurally defective mutants of Aspergillus nidulans. Cytoplasmic vesicles were found concentrated at growing apices. Plasmalemmasomes occurred frequently in the subapical and basal cytoplasm of growing sterigmata and near their developing septa ; after septum formation they were flattened against the septa and the wall of the older cell and were associated with lomasomes. At this stage the wall developed a superficial lamina; the basipetally budding spore chain was invested from its initiation by a continuation of this lamina. The lamina was also associated with a dense network in the medium around the basal mycelium. The inner, secondary wall of the conidiophore became more electron-lucent with age; the continuity between this wall and the single wall of the sterigmata suggested this structure to be the site of action of the bristle locus. Pigmentation of wild-type and mutant conidiophores was associated with an electron-dense modification of the outer, primary wall. Stratification of the spore wall was indicated only by the similar development of a layer of electron-dense material. Cytoplasmic microfilaments were observed in all parts of the colony.

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Section: P T P O L I V E Rmentioning

confidence: 76%

Conidiophore and Spore Development in Aspergillus nidulans

Oliver

1972

Journal of General Microbiology

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“…It is not unreasonable to suppose that during the process of conidia budding from the phialide, mtDNA is being replicated in the mitochondria included in the conidium and that HmbB is crucial for this process. There is no work extant on the fate of mitochondria during conidiogenesis in any species of Aspergillus except from some early electron microscopy work, which does not address specifically this issue but visualized mitochondria in conidia and confirmed the accumulation of mitochondria in the vesicle (Weisberg and Turian, ; Sewall et al ., ). Nuclear division during conidial budding from phialide has been compared to that occurring in budding in S. cerevisiæ (Timberlake, ).…”

Section: Discussionmentioning

confidence: 99%

A dually located multi‐HMG‐box protein of Aspergillus nidulans has a crucial role in conidial and ascospore germination

Karácsony

Gácser

Vágvölgyi

et al. 2014

Molecular Microbiology

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SummarySeven HMG-box proteins of Aspergillus nidulans have been identified in the genomic databases. Three of these have the characteristics of non-specific DNAbinding proteins. One of these, AN1267 (HmbB), comprises one canonical HMG-box in its C-terminus and upstream of the canonical box two structurally related boxes, to be called Shadow-HMG-boxes. This protein defines, together with the Podospora anserina mtHMG1, a clade of proteins present in the Pezizomycotina, with orthologues in some of the Taphrinomycotina. HmbB localizes primarily to the mitochondria but occasionally in nuclei. The deletion of the cognate gene results in a number of pleiotropic effects, including those on hyphal morphology, sensitivity to oxidative stress, absence of sterigmatocystin production and changes in the profile of conidial metabolites. The most striking phenotype of deletion strains is a dramatic decrease in conidial and ascospore viability. We show that this is most likely due to the protein being essential to maintain mitochondrial DNA in spores.

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“…Serial sections have distinguished these paramural organelles, termed lomasomes (309), from multiple, localized infoldings of the plasmalemma which are referred to as plasmalemmasomes (200). Lomasomes have been suggested to contribute to the synthesis of new wall material (182,200,278,435,451), particularly during secondary thickening of the wall of thallic conidia discussed below (95,96). The details of how lomasomal vesicles participate in wall biosynthesis are still unknown.…”

Section: Blastic Developmentmentioning

confidence: 99%

Models of cell differentiation in conidial fungi.

Cole¹

1986

Microbiological Reviews

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Ultrastructure ofAspergillus nidulans conidia and conidial lomasomes

Cited by 24 publications

References 35 publications

Conidiophore and Spore Development in Aspergillus nidulans

Conidiophore and Spore Development in Aspergillus nidulans

A dually located multi‐HMG‐box protein of Aspergillus nidulans has a crucial role in conidial and ascospore germination

Models of cell differentiation in conidial fungi.

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