Armillaria. Armillaria, genus of about 35 species of parasitic fungi in the family Physalacriaceae (order Agaricales), found throughout northern North America and Europe, principally in forests of hardwoods or mixed conifers.
Where are basidiomycota found?
Basidiomycota are found in virtually all terrestrial ecosystems, as well as freshwater and marine habitats (Kohlmeyer and Kohlmeyer, 1979; Hibbett and Binder, 2001). Basidiomycota have a huge impact on human affairs and ecosystem functioning.
Where are club fungi found?
The basidia, which are the reproductive organs of these fungi, are often contained within the familiar mushroom, commonly seen in fields after rain, on the supermarket shelves, and growing on your lawn. The fruiting bodies of a basidiomycete form a ring in a meadow, commonly called “fairy ring” (Figure 1).
What are the characteristics of phylum Basidiomycetes?
Salient features
- Basidiomycetes are characterized primarily by producing their sexual spores, termed basidiospores (typically 4 in number), on the outside of a specialized, microscopic, spore producing structure called the basidium.
- Basidiospores are haploid but can be either uninucleate or multinucleate upon maturity.
What is the function of the Basidiocarp?
basidiocarp, also called basidioma, in fungi, a large sporophore, or fruiting body, in which sexually produced spores are formed on the surface of club-shaped structures (basidia).
What are the characteristics of agaricales?
Characteristics. Basidiocarps of the agarics are typically fleshy, with a stipe, often called a stem or stalk, a pileus (or cap) and lamellae (or gills), where basidiospores are produced. This is the stereotypical structure of a mushroom.
Where does meiosis occur in basidiomycetes?
In basidiomycetes, karyogamy and meiosis takes place in Basidium.
Where does meiosis take place in basidiomycota?
In summary, meiosis takes place in a diploid basidium. Each one of the four haploid nuclei migrates into its own basidiospore. The basidiospores are ballistically discharged and start new haploid mycelia called monokaryons.
Where does meiosis occur in mushroom?
mushroom cap
Meiosis occurs in the cells of the mushroom cap and produce haploid spores which complete the lifecycle.
How are basidia formed?
The basidia is itself formed by plasmogamy between mycelia from two different spores. Plasmogamy results in binucleate hyphae, that is, hyphae with two types of nuclei, one from each parent. In the gills of the fruiting body, some cells undergo fusion of these two nuclei. These now diploid cells are the basidia.
Where are basidiocarp found?
basidiocarp, also called basidioma, in fungi, a large sporophore, or fruiting body, in which sexually produced spores are formed on the surface of club-shaped structures (basidia). Basidiocarps are found among the members of the phylum Basidiomycota (q.v.), with the exception of the rust and smut fungi.
What is basidiocarp composed of?
In its simplest form, a basidiocarp consists of an undifferentiated fruiting structure with a hymenium on the surface; such a structure is characteristic of many simple jelly and club fungi. In more complex basidiocarps, there is differentiation into a stipe, a pileus, and/or various types of hymenophores.
Is Basidiomycota a parasite or saprophytic?
The fungi comprising the phylum Basidiomycota commonly are known as basidiomycetes. It is a large phylum that includes forms commonly known as mushrooms, boletes, puffballs, earthstars, stinkhorns, birds-nest fungi, jelly fungi, bracket or shelf fungi, and rust and smut fungi. Both parasite and saprophytic.
What is the importance of basidiomycetes?
The basidiomycetes is an important group of fungi including harmful as well as many useful species. It has edible mushrooms in one side and poisonous mushrooms, smut fungi etc on other side. Rust and smut fungi are two groups of parasites causing plant diseases that destroy many millions of dollars worth of crops annually.
How many types of mushrooms are in the order Agaricales?
The order Agaricales, also known as gilled mushrooms (for their distinctive gills), or euagarics, contains some of the most familiar types of mushrooms. The order has about 4,000 identified species, or one quarter of all known homobasidiomycetes.
What are the three stages of mycelia in basidiomycetes?
The mycelium of most basidiomycetes passes through three distinct stages of development: the primary, the secondary, and the tertiary – before the fungus completes its life cycle. Primary mycelia: Also known as homokaryon to emphasize the fact that all the nuclei are identical, usually develops upon the germination of a basidiospore.
