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 [...]
Learn about the comparison among P. Graminis, P. Recondita and P. Striiformis. Comparison # P. Graminis: 1. Causes black rust of wheat attacking the stems most severely. 2. Generally appears in March in Northern India and the last week of November in South India 3. Uredosori appear on leaves, stems and ears. 4. Uredopustules are red or brown in colour, [...]
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 [...]