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  • Electronic Resource  (5)
  • Fungus  (3)
  • Fungi  (2)
  • Development  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Development of the discharge apparatus in the fungus Entophlyctis (1976)
    Springer
    Archives of microbiology 111 (1976), S. 59-71 
    Details
    ISSN: 1432-072X
    Keywords: Fungus ; Microscopy ; Discharge apparatus ; Morphogenesis ; Extracellular material ; Taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Correlative light and electron microscopic observations were used to reconstruct the morphological events involved in the development of the discharge apparatus of Entophlyctis zoosporangia. A discharge plug formed as vesicles containing fibrillar material fused with the plasma membrane and deposited their matrices between the plasma membrane and zoosporangial wall. At the apex of the enlarging plug, the zoosporangial wall lost its microfibrillar appearance, became diffuse, and left an inoperculate discharge pore. The discharge plug exuded through this pore and then expanded into a sphere which rested at the tip of the discharge papilla or tube. After the release of the discharge plug, the number of fibrilla containing vesicles decreased and abundant endoplasmic reticulum appeared in the cytoplasm below the plug. Granular material then accumulated at the interface of the discharge plug and the plasma membrane. This was the endo-operculum. A single layer of endoplasmic reticulum subtended the area of plasma membrane which the endo-operculum covered. Later, dictyosomes appeared in the cytoplasm below the endo-operculum. Fusion of Golgi vesicles with the plasma membrane below the endo-operculum coincided with the initiation of cytoplasmic cleavage. This sequence of events indicates that, unlike the discharge plug, the endo-operculum does not originate by vesicular addition of preformed material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446550
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructural cytochemistry of the diaminobenzidine reaction in the aquatic fungus Entophlyctis variabilis (1977)
    Springer
    Archives of microbiology 114 (1977), S. 123-136 
    Details
    ISSN: 1432-072X
    Keywords: Fungus ; Cytochemistry ; Microbodies ; Development ; Entophlyctis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ultrastructural localization of peroxidatic activity was investigated in the chytrid Entophlyctis variabilis with the 3,3′-diaminobenzidine (DAB) cytochemical prodedure. The subcellular distribution of reaction product varied with changes in pH of the DAB medium and with the developmental stage of the fungus. Incubations in the DAB reaction medium at pH 9.2 produced an electron dense reaction product within single membrane bounded organelles which resembled microbodies but which varied in shapes from elongate to oval. At this pH the cell wall also stained darkly. When the pH of the DAB medium was lowered to pH 8.2 or 7.0, DAB oxidation product was localized within mitochondrial cristae as well as in microbodies and zoosporangial walls. As soon as zoospores were completely cleaved out of the zoosporangial cytoplasm, endoplasmic reticulum (ER) also stained. When the wall appeared around the encysted zoospore, ER staining was no longer found. The influence of the catalase inhibitor, aminotriazole, and the inhibitors of heme enzymes, sodium azide and sodium cyanide, on the staining patterns within cells incubated in the DAB media indicates that microbody staining is due to both catalase and peroxidase, mitochondrial staining is due to cytochrome c, and ER staining is due to peroxidase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410773
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Terminology and nomenclature of protist cell surface structures (1994)
    Springer
    Protoplasma 181 (1994), S. 1-28 
    Details
    ISSN: 1615-6102
    Keywords: Protists ; Algae ; Fungi ; Protozoa ; Cell surface structures ; Terminology ; Nomenclature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The use of a precise terminology is important to the unambiguous exchange of information in the multidisciplinary area of protistology. In this paper we attempt to establish clear definitions, give illustrations, and comment on the different terms used for cell surface structures of protists and related organisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666386
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  • 4
    Electronic Resource
    Electronic Resource
    Isolation and ultrastructural identification of membranes from the fungusGilbertella persicaria (1982)
    Springer
    Protoplasma 111 (1982), S. 87-106 
    Details
    ISSN: 1615-6102
    Keywords: Fungi ; Gilbertella persicaria ; Membranes ; Mitochondria ; Organelle isolation ; Plasma membrane ; Ultrastructure ; Vacuoles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Methods are described for isolating and identifying subcellular membranes from walled hyphae ofGilbertella persicaria. Differences in thickness and symmetry of membranes and in contents of vesicles were used to distinguish different types of membranes. Mitochondria, vacuoles, plasma membrane, and vesicles with attached ribosomes from homogenized germlings equilibrated at the 1.2/1.4 M interface in discontinuous sucrose gradients. Accelerated flotation in centrifuged Ficol-sucrose gradients resulted in the additional separation of the mixed membranes into three fractions: one contained predominantly intact mitochondria, another was composed of vacuoles and vesicles coated with ribosomes, and a third was enriched in plasma membranes. Based upon morphometric analysis, these fractions contained 92% mitochondria, 53% vacuoles, and 89% plasma membranes, respectively. The source of vesicles coated with ribosomes was investigated since rapidly growing hyphae ofG. persicaria contained little rough endoplasmic reticulum as compared with other classes of membranes. Reconstruction from electron micrographs of mitochondrial fragmentation and vesiculation suggested that most of the ribosome-coated vesicles originated from disrupted mitochondria rather than from rough endoplasmic reticulum. The study demonstrates the utility of ultrastructural markers to identify membranesin vitro independent of, or as an adjunct to, cytochemical and biochemical markers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01282067
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  • 5
    Electronic Resource
    Electronic Resource
    Cross-linking bridges associated with the microbody-lipid globule complex inChytriomyces aureus andChytriomyces hyalinus (1982)
    Springer
    Protoplasma 112 (1982), S. 181-188 
    Details
    ISSN: 1615-6102
    Keywords: Fungus ; Zoospore ; Ultrastructure ; Membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Determining how the orientation and association among organelles are maintained within zoospores of theChytridiales is important to understanding the control of zoospore motility. Zoospores of the aquatic fungi,Chytriomyces aureus andC. hyalinus, contain microbody-lipid globule complexes with an elongate microbody adjacent to the portion of a lipid globule facing the cell's interior and a fenestrated cisterna (the rumposome) opposed to the surface of the lipid globule toward the plasma membrane. Mitochondria are intimately associated with the microbody. Electron microscopy of the microbody-lipid globule complex fixed in glutaraldehyde and osmium tetroxide, with or without tannic acid, reveals cross-linking bridges connecting the rumposome to the plasma membrane, to the microbody, and to microtubules of the rootlet extending from the kinetosome. It is concluded that these bridges are responsible, at least in part, for the consistent location of the microbody-lipid globule complex in the zoospore body. The possible role of the rumposome as a receptor organelle is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284092
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