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 puccinia graminis with the help of suitable diagrams. Dikaryophase in the Life Cycle of Puccinia: This phase in the life cycle of Puccinia is confined to the primary host which is wheat. It consists of dikaryotic mycelium and two spore stages, uredineal and telial. 1. Dikaryotic Mycelium: It is [...]
In this article we will discuss about the similarities and dissimilarities between rusts and smuts. Similarities between Rusts and Smuts: (i) The mycelium in both passes through two stages, the monokaryotic (primary) stage and the dikaryotic (secondary) stage. (ii) The dikaryotic mycelium is of greater importance. It is usually perennial in both. It is intercellular and obtains nourishment by means [...]