The following points highlight the four main types of lichen thallus. The types are: 1. Crustose (Crustaceous) Lichens 2. Foliose (Foliaceous) Lichens 3. Fruticose Lichens 4. Squamulose Lichens. Type # 1. Crustose (Crustaceous) Lichens: The thallus is of insignificant size. It is flat, thin usually without any distinct lobes. It is just like a thin layer or crust closely attached [...]
In this article we will discuss about the life cycle of melampsora with the help of suitable diagrams. Mycelium of Melampsora: The mycelium is intercellular, septate, branched, dikaryotic, subepidermal and usually found within the parenchymatous tissues of the host. Life-Cycle of Melampsora: M. lini infecting several species of Linum is an autoecious rust. Although uredinial and telial stages are very [...]
The following points highlight the five important genera of family pucciniaceae. The genera are: 1. Gymnosporangium 2. Hemileia 3. Phragmidium 4. Ravenalia 5. Uromyces. Genera # 1. Gymnosporangium: Represented by 57 species, the genus is restricted to temperate regions. Most of the species are heteroecious and demicyclic, the telial stage occurs on Gymnosperms while aecial cups are formed on dicotyledons. [...]