In this article we will discuss about the origin and evolution of ascomycetes. The phylogeny of Ascomycetes is still uncertain. The supporters of polyphyletic origin of fungi from the various classes of algae derive the Ascomycetes from the red algae (presumably the Florideae). The floridean hypothesis was first proposed by Sachs in 1875. The-adherents of this hypothesis such as Thaxter [...]
In this article we will discuss about:- 1. Genus of Cercospora 2. Mycelium of Cercospora 3. Reproduction. Genus of Cercospora: The form-genus Cercospora includes about 3,800 form-species. Majority of them are plant pathogens which cause leaf spot diseases of higher plants of economic value (Fig. 16.11 A). Commonly the leaf spot disease is called the tikka disease. C. personata and [...]
In this article we will discuss about the reproduction in ascobolus with the help of suitable diagrams. Mycelium of Ascobolus: The mycelium of the fungus is well developed and ramifies in the substratum forming complex hyphal masses. The mycelium is septate with multinucleate cells and branched. The complex hyphal mass absorbs the food material from the substratum and supplies to [...]