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Aguirre-López B, Suaste-Olmos F, Peraza-Reyes L. The peroxisome protein translocation machinery is developmentally regulated in the fungus Podospora anserina. Microbiol Spectr 2024; 12:e0213923. [PMID: 38088545 PMCID: PMC10782954 DOI: 10.1128/spectrum.02139-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 11/11/2023] [Indexed: 01/13/2024] Open
Abstract
IMPORTANCE Sexual reproduction allows eukaryotic organisms to produce genetically diverse progeny. This process relies on meiosis, a reductional division that enables ploidy maintenance and genetic recombination. Meiotic differentiation also involves the renewal of cell functioning to promote offspring rejuvenation. Research in the model fungus Podospora anserina has shown that this process involves a complex regulation of the function and dynamics of different organelles, including peroxisomes. These organelles are critical for meiosis induction and play further significant roles in meiotic development. Here we show that PEX13-a key constituent of the protein conduit through which the proteins defining peroxisome function reach into the organelle-is subject to a developmental regulation that almost certainly involves its selective ubiquitination-dependent removal and that modulates its abundance throughout meiotic development and at different sexual differentiation processes. Our results show that meiotic development involves a complex developmental regulation of the peroxisome protein translocation system.
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Affiliation(s)
- Beatriz Aguirre-López
- Departamento de Bioquímica y Biología Estructural, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Coyoacán, Mexico
| | - Fernando Suaste-Olmos
- Departamento de Bioquímica y Biología Estructural, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Coyoacán, Mexico
| | - Leonardo Peraza-Reyes
- Departamento de Bioquímica y Biología Estructural, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Coyoacán, Mexico
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Ho WH, Ranghoo VM, Hyde KD, Hodgkiss IJ. Ascal ultrastructural study in Annulatascus hongkongensis sp. nov., a freshwater ascomycete. Mycologia 2019. [DOI: 10.1080/00275514.1999.12061094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Wai-Hong Ho
- Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - V. Mala Ranghoo
- Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Kevin D. Hyde
- Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - I. John Hodgkiss
- Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong
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Austin WL, Frederick L, Roth IL. Scanning Electron Microscope Studies on Ascospores of Homothallic Species of Neurospora. Mycologia 2018. [DOI: 10.1080/00275514.1974.12019582] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- W. Lena Austin
- Department of Biology, Atlanta University, Atlanta, Georgia 30314
| | | | - Ivan L. Roth
- Department of Microbiology, University of Georgia, Athens, Georgia 30601
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Grognet P, Lalucque H, Silar P. The PaAlr1 magnesium transporter is required for ascospore development in Podospora anserina. Fungal Biol 2012; 116:1111-8. [PMID: 23063190 DOI: 10.1016/j.funbio.2012.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 11/28/2022]
Abstract
The PaAlr1 gene encoding a putative plasma membrane magnesium (Mg) transporter in Podospora anserina was inactivated. The PaAlr1(Δ) mutants showed sensitivity to deprivation and excess Mg(2+) and Ca(2+). They also exhibited an autonomous ascospore maturation defect. Mutant ascospores were arrested at an early stage when they contained two nuclei. These data emphasize the role of Mg ions during sexual development in a filamentous fungus.
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Affiliation(s)
- Pierre Grognet
- Univ Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (IED), Paris, France
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The crucial role of the Pls1 tetraspanin during ascospore germination in Podospora anserina provides an example of the convergent evolution of morphogenetic processes in fungal plant pathogens and saprobes. EUKARYOTIC CELL 2008; 7:1809-18. [PMID: 18757568 DOI: 10.1128/ec.00149-08] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Pls1 tetraspanins were shown for some pathogenic fungi to be essential for appressorium-mediated penetration into their host plants. We show here that Podospora anserina, a saprobic fungus lacking appressorium, contains PaPls1, a gene orthologous to known PLS1 genes. Inactivation of PaPls1 demonstrates that this gene is specifically required for the germination of ascospores in P. anserina. These ascospores are heavily melanized cells that germinate under inducing conditions through a specific pore. On the contrary, MgPLS1, which fully complements a DeltaPaPls1 ascospore germination defect, has no role in the germination of Magnaporthe grisea nonmelanized ascospores but is required for the formation of the penetration peg at the pore of its melanized appressorium. P. anserina mutants with mutation of PaNox2, which encodes the NADPH oxidase of the NOX2 family, display the same ascospore-specific germination defect as the DeltaPaPls1 mutant. Both mutant phenotypes are suppressed by the inhibition of melanin biosynthesis, suggesting that they are involved in the same cellular process required for the germination of P. anserina melanized ascospores. The analysis of the distribution of PLS1 and NOX2 genes in fungal genomes shows that they are either both present or both absent. These results indicate that the germination of P. anserina ascospores and the formation of the M. grisea appressorium penetration peg use the same molecular machinery that includes Pls1 and Nox2. This machinery is specifically required for the emergence of polarized hyphae from reinforced structures such as appressoria and ascospores. Its recurrent recruitment during fungal evolution may account for some of the morphogenetic convergence observed in fungi.
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Abstract
Sporulation of the baker's yeast Saccharomyces cerevisiae is a response to nutrient depletion that allows a single diploid cell to give rise to four stress-resistant haploid spores. The formation of these spores requires a coordinated reorganization of cellular architecture. The construction of the spores can be broadly divided into two phases. The first is the generation of new membrane compartments within the cell cytoplasm that ultimately give rise to the spore plasma membranes. Proper assembly and growth of these membranes require modification of aspects of the constitutive secretory pathway and cytoskeleton by sporulation-specific functions. In the second phase, each immature spore becomes surrounded by a multilaminar spore wall that provides resistance to environmental stresses. This review focuses on our current understanding of the cellular rearrangements and the genes required in each of these phases to give rise to a wild-type spore.
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Affiliation(s)
- Aaron M Neiman
- Department of Biochemistry and Cell Biology, SUNY Stony Brook, Stony Brook, New York 11794-5215, USA.
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9
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Abstract
The ultrastructure of ascospore wall formation in the pyrenomycete Sordaria brevicollis was studied in developing asci at progressive time intervals. From early spore delimitation through final stage of maturation, the wall of the ascospore differentiated into four composite layers, the periascosporium the delineation ascosporium, the subascosproium, and the endoascosproium, While ascospores were at the hyaline stage of development,they possessed only the periascosporium and delineation ascosporium as their wall components. At about 7 to 8 days from the initiation of the cross, the spores developed a yellow color, and this coloration was always associated with the elaboration of the subascorsporium just internal to the ascosporium. Asthe spores continued to progressively darken in color, the subascosporium was seen to increase in complexity, electron density, and thickness. Soon after the formation of the subascosporium, the endoascosporium began to develop de novo and was, therefore, the last wall layer formed as the spore approached maturity.
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Farley J, Jersild R, Niederpruem D. Ultrastructural aspects of ascosporulation inArthroderma quadrifidum (=Trichophyton terrestre). Med Mycol 1976. [DOI: 10.1080/00362177685190491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Tyson K, Griffiths D. Developmental morphology and fine strucutre of Placoasterella baileyi. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/s0007-1536(76)80053-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
Ascospore delimitation in Saccharomyces cerevisiae is initiated by a pair of unit membranes between which the spore wall is subsequently laid down.
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Illingworth RF, Rose AH, Beckett A. Changes in the lipid composition and fine structure of Saccharomyces cerevisiae during ascus formation. J Bacteriol 1973; 113:373-86. [PMID: 4569408 PMCID: PMC251640 DOI: 10.1128/jb.113.1.373-386.1973] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Eighty to ninety percent of vegetative cells of Saccharomyces cerevisiae DCL 740 incubated in KCl-acetate medium form asci, the majority of which are four-spored. Ascospores are visible in asci after about 24 hr, and spore formation is complete after about 48 hr. The dry weight of the cells increases by about 75% during 48 hr of incubation, while the lipid content of the cells increases by a factor of four. The increase in lipid content is attributed mainly to an increased synthesis of sterol esters and triacylglycerols and to a lesser extent of phospholipids. The phospholipid and sterol compositions do not change appreciably, but there is a marked increase in the proportion of unsaturated fatty acid residues in ascan lipids. Uniformly labeled (14)C-acetate is incorporated mainly into sterol esters and triacylglycerols and phospholipids. Pulse-labeling by adding acetate-U-(14)C to sporulating cultures and harvesting after a further 6 hr of incubation reveal two main periods of acetate incorporation, namely between 0 and 18 hr, and between 24 and 30 hr. Electron micrographs of thin sections through developing asci show that the principal changes in fine structure occur between 18 and 24 hr and include the appearance of numerous electron-transparent vesicles which become aligned around the meiotic nucleus, and the laying down of extensive endoplasmic reticulum membranes. Changes in fine structure are discussed in relation to the alterations in lipid content and composition of asci.
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Garrison R, Lane J, Johnson D. Ultrastructural studies on the cleistothecium ofAjellomyces dermatitidis. Med Mycol 1973. [DOI: 10.1080/00362177385190271] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Lutley M, Wilson IM. Development and fine structure of ascospores in the marine fungus Ceriosporopsis halima. ACTA ACUST UNITED AC 1972. [DOI: 10.1016/s0007-1536(72)80089-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Alloway JM, Wilson IM. Fine structure of spore degeneration in Podospora arizonensis. ACTA ACUST UNITED AC 1972. [DOI: 10.1016/s0007-1536(72)80152-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Simonet JM, Zickler D. Mutations affecting meiosis in Podospora anserina. I. Cytological studies. Chromosoma 1972; 37:327-51. [PMID: 4340133 DOI: 10.1007/bf00319874] [Citation(s) in RCA: 47] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Mainwaring HR. The fine structure of ascospore wall formation in Sordaria fimicola. ARCHIV FUR MIKROBIOLOGIE 1972; 81:126-35. [PMID: 5015589 DOI: 10.1007/bf00412323] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Observations on the fine structure of ascospores of marine fungi: Halosphaeria appendiculata, Torpedospora radiata and Corollospora maritima. ACTA ACUST UNITED AC 1972. [DOI: 10.1016/s0007-1536(72)80005-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hypoxylon rubiginosum: Cytology of the ascus and surface morphology of the ascospore. Mycopathologia 1969. [DOI: 10.1007/bf02052673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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