• Margaret E. Barr
Part of the The Mycota book series (MYCOTA, volume 7A)


The fungi that constitute the Ascomycota undergo meiosis after the formation of a short-lived zygote and produce meiospores by free-cell formation within a meiosporangium termed the ascus. They exhibit bipolar sexual compatibility. They have a two-layered cell wall that with transmission electron microscopy (TEM) is composed of inner electron-opaque and outer electron-lucent layers. Within this assemblage of organisms, which contains the greatest numbers of fungi, a splendid diversity has developed. Many ideas on the complexities of variation in taxa and argu- ments concerning their relationships may be gained from the proceedings of the NATO Advanced Research Workshop on Ascomycete Systematics (Hawksworth 1994). A formal outline of classification for families and higher taxa in the Ascomycota, based on molecular evidence, is presented by Eriksson and Winka (1997, 1998). The following is a simplified version that outlines some of the features that appear to be important and provides a summary of the orders of Ascomycota.


Fermentation Peri Alkaloid Chitin Aspergillus 


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© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Margaret E. Barr
    • 1
  1. 1.SidneyCanada

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