In this article we will discuss about the evolution of thallus in lower fungi with the help of diagrams. In the simplest and primitive members, which are aquatic, there is no mycelium. The thallus in these forms is microscopic and unicellular. In Olpidium endogenum, it consists of a tiny mass of naked, uninucleate protoplast which enters the host cell, enlarges [...]
The following points highlight the two main kinds of mycelia in fungi. The kinds are: 1. Aseptate Mycelium 2. Septate Mycelium. Kind # 1. Aseptate Mycelium (Fig. 1.2): In the algal fungi (Phycomycetes) the mycelium in the vegetative phase usually lacks internal partitions of any kind. The hyphae are thus multinucleate and aseptate. The mycelium is a continuous mass. It [...]
This article throws light upon the seven different types of modifications of hyphae mycelium with their diagrams. The types are: 1. Plectenchyma 2. Rhizomorph 3. Sclerotium (PI. Sclerotia) 4. Stromata 5. Pseudosclerotium (pi. pseudosclerotia) 6. Appressorium (pl. Appressoria) 7. Haustorium (pl. Haustoria). Type # 1. Plectenchyma (Fig. 1.12): A false tissue formed by aggregation of hyphae is known as Plectenchyma. [...]