Titlebook: Ascomycete Systematics; Problems and Perspec David L. Hawksworth Book 1994 Springer Science+Business Media New York 1994 Ascomycetes.evolut

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Thallic Mycelial and Cytological Characters in Ascomycete Systematics minor importance. In comparison to other cryptogams, the degree of differentiation in lichen thalli is high while the number of specialized cells and tissues is low. Differentiation is often achieved by multifunctionality and low determination of structures. This variability of characteristics redu

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Can We Recognize Monophyletic Groups among Hyphomycetes?tinctive or conservative as to suggest either monophyly or strong convergence in certain groups of anamorph-genera. A number of these groups are discussed and illustrated, with confirmatory or confounding evidence from the known teleomorphs.

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Secondary Metabolites as a Tool in Ascomycete Systematics: Lichenized Fungiday they take on a new importance as markers in genetic studies and for the analysis of gene flow and reproductive isolation. Lichen systematics has been much hampered in that artificial crosses are not possible. Refined methods of thin-layer chromatography and high-performance liquid chromatography

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Asci and Ascospores in Ascomycete Systematicsaracteristics are considered. The relative constancy in several types of ascus seems to indicate that they can be used to define taxa of a rather high level. Conversely, ascospore wall structure is probably more dependent on external variations and has to be used only to define lower systematic leve