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FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak

Though the dictyosome of the Golgi apparatus appears to be generally distributed in plant and animal cells, it is here described for the first time in the fungi. The present report illustrates, in electron micrographs of thin sections, the characteristic structure of the Golgi dictyosome in a specia...

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Autores principales: Moore, Royall T., McAlear, James H.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1963
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2106189/
https://www.ncbi.nlm.nih.gov/pubmed/19866617
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author Moore, Royall T.
McAlear, James H.
author_facet Moore, Royall T.
McAlear, James H.
author_sort Moore, Royall T.
collection PubMed
description Though the dictyosome of the Golgi apparatus appears to be generally distributed in plant and animal cells, it is here described for the first time in the fungi. The present report illustrates, in electron micrographs of thin sections, the characteristic structure of the Golgi dictyosome in a special cell type of a supporting pseudo-tissue (the inner ectal excipulum) of a highly evolved Ascomycete, Neobulgaria pura (Fr.) Petrak, a monotypic discomycete. This organelle may secrete the gelatinous matrix filling the cup formed by the inner ectal excipulum. All the other cells in this species appear more typical of fungal cells; i.e., they have no dictyosome and, unlike the cup-forming cells, they show characteristic continuities of the plasma membrane with the perinuclear cisternae. The dictyosome, in those cells in which it appears in this fungus, is formed by a series of vesiculations of the outer component of the nuclear envelope that align to form a stack of sacs. The sacs near the nucleus are flattened (by what appears to be an intermembrane cement) while those near the plasma membrane are more distended. These observations suggest three possibilities: first, fungi may be more closely related to other eukaryotic cells than previously suspected from electron microscopic studies; second, the outer nuclear membrane may have been the primitive precursor of the dictyosome; and third, the inverse relationship of the occurrence of the nuclear membrane plasma membrane continuities and the dictyosome suggests that the latter may have evolved as a means of removing from the cell the products of reactions occurring on a discontinuous membrane system.
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spelling pubmed-21061892008-05-01 FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak Moore, Royall T. McAlear, James H. J Cell Biol Article Though the dictyosome of the Golgi apparatus appears to be generally distributed in plant and animal cells, it is here described for the first time in the fungi. The present report illustrates, in electron micrographs of thin sections, the characteristic structure of the Golgi dictyosome in a special cell type of a supporting pseudo-tissue (the inner ectal excipulum) of a highly evolved Ascomycete, Neobulgaria pura (Fr.) Petrak, a monotypic discomycete. This organelle may secrete the gelatinous matrix filling the cup formed by the inner ectal excipulum. All the other cells in this species appear more typical of fungal cells; i.e., they have no dictyosome and, unlike the cup-forming cells, they show characteristic continuities of the plasma membrane with the perinuclear cisternae. The dictyosome, in those cells in which it appears in this fungus, is formed by a series of vesiculations of the outer component of the nuclear envelope that align to form a stack of sacs. The sacs near the nucleus are flattened (by what appears to be an intermembrane cement) while those near the plasma membrane are more distended. These observations suggest three possibilities: first, fungi may be more closely related to other eukaryotic cells than previously suspected from electron microscopic studies; second, the outer nuclear membrane may have been the primitive precursor of the dictyosome; and third, the inverse relationship of the occurrence of the nuclear membrane plasma membrane continuities and the dictyosome suggests that the latter may have evolved as a means of removing from the cell the products of reactions occurring on a discontinuous membrane system. The Rockefeller University Press 1963-01-01 /pmc/articles/PMC2106189/ /pubmed/19866617 Text en Copyright © Copyright, 1963, by The Rockefeller Institute Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Moore, Royall T.
McAlear, James H.
FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title_full FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title_fullStr FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title_full_unstemmed FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title_short FINE STRUCTURE OF MYCOTA : 4. The Occurrence of the Golgi Dictyosome in the Fungus Neobulgaria pura (Fr.) Petrak
title_sort fine structure of mycota : 4. the occurrence of the golgi dictyosome in the fungus neobulgaria pura (fr.) petrak
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2106189/
https://www.ncbi.nlm.nih.gov/pubmed/19866617
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