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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Planta 72 (1966), S. 29-42 
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Kulturversuche mit der Erdflechte Endocarpon pusillum im Labor bestätigen die oft angezweifelten Beobachtungen und Ergebnisse von Stahl (1877). Eine reproduzierbare Kultur dieser Flechte im Labor von Spore zu Spore ist möglich. Bereits nach zwei Monaten läßt sich eine Differenzierung in Rinde, Algenschicht, Mark und Rhizinen erkennen; nach 5-6 Monaten sind reife, keimfähige Ascosporen vorhanden. Beobachtungen bei der Sporengewinnung zeigten, daß die Ascosporen bis zu einer Höhe von 5 cm ausgeschleudert werden. Der Sporenabschuß kann dabei mehrere Tage anhalten und zu dichten Sporenaussaaten führen. Die Thallusentwicklung (Keimung der Ascosporen, Umwandlung der Hymenialgonidien in Thallusgonidien, Bildung von Thallusinitialen, Prothalli und Primärthalli) und die Bildung reifer Perithecien mit keimfähigen Sporen in Laborkulturen wird beschrieben und abgebildet. Die Frage der speziellen Eignung schnellwüchsiger kleiner Erdflechten für die Laborkultur und das Problem der “Flechtensynthese” wird diskutiert.
    Notes: Summary Culture experiments with the lichen Endocarpon pusillum corroborate the often doubted observations and results of Stahl (1877). It is possible to cultivate this lichen in the laboratory from spore to spore. After two months a differentiation into cortex, algae-layer, medulla and rhizines is developed and after 5–6 months the formation of mature and germinable ascospores is finished. Observations of the spore dispersal showed that the ascospores are ejected up to 5 cm. The spore dispersal can endure for some days and in this way produces a compact dissemination. The thallus development (germination of ascospores, transformation of hymenialalgae into thallus-algae, development of thallus initials, prothalli and primary thalli) and the formation of mature perithecia with germinable ascospores in laboratory cultures is described and illustrated. The opinion that such quickly growing and developing epigaeic lichens are especially suitable for laboratory cultures is emphasized and the problem of “lichensynthesis” is discussed in relation to the results of the experiments.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Antonie van Leeuwenhoek 69 (1996), S. 203-209 
    ISSN: 1572-9699
    Keywords: Abies ; Pinus ; Trimmatostroma ; conifer pathology ; epiphytes ; needle fungi ; stone fungi ; microcolonial fungi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Trimmatostroma abietis from the needles of conifers and from stone, mostly in Germany, is described. On the natural substrate it is characterized by stromatic conidiomata. Conidia are mostly two-celled, are arranged in long chains, and originate by intercalary dilatation of fertile hyphae. The wide morphological plasticity of the fungus and its physiological profile are described. Its occurrence as a saprophyte and possibly opportunistic pathogen on plants and as an invader of environments with low water activity, particularly stone surfaces, are discussed. Relationships with other taxa are outlined.
    Type of Medium: Electronic Resource
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