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  • 1970-1974  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Fine structure of the blue-green phycobiont and its relation to the mycobiont in two Gonohymenia lichens (1971)
    Springer
    Archives of microbiology 76 (1971), S. 103-113 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Electron micrographs of the two closely related lichen species Gonohymenia mesopotamica and G. sinaica were examined. It was found that the fine structure and cytokinesis of the phycobiont, Gloeocapsa sp. are not radically different from those of non-lichenized related blue-green algae. The single dissimilarity noted is the lack of polyglucoside bodies in the lichenized state. The contact between the symbionts is by fungal penetration into the algal component, whereby the integrity of both the fungal wall and the four-lamellar structure of the algal cell wall are preserved. Environmental conditions seem to have no effect on the fungus-alga relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411784
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Electron microscopic study of the lichenDermatocarpon hepaticum (Ach.) Th. Fr. (1971)
    Springer
    Protoplasma 73 (1971), S. 457-468 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructure of the alga and fungus of the lichenDermatocarpon hepaticum and their relationship has been studied. The contact between the symbionts was found to be of a different type from that found in other lichen species, and to some extent comparable with the relation of obligate parasites and their host. The anatomy of the thallus and the distribution pattern of the components in the thallus has been revealed by examining serial sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01273946
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structural modifications of the phycobiont in the lichen thallus (1970)
    Springer
    Protoplasma 69 (1970), S. 85-96 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Modifications in the fine structure of the algal component of two lichens,Aspicilia sp. andSquamarina crassa v.crassa, have been studied. It has been pointed out that fungal penetration is not essential for the mutual relationship between the two symbionts of the lichen thallus. The structural changes taking place during the life cycle of the phycobiont of the two lichens examined are not a response to fungal invasion. Careful examinations of serial sections revealed an interesting correlation between the growth pattern of the thallus and the distribution of the algal cells in the algal layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276653
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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