Table of Contents
What structure is typical of the Basidiomycetes?
Basidiomycota are typically filamentous fungi composed of hyphae. Most species reproduce sexually with a club-shaped spore-bearing organ (basidium) that usually produces four sexual spores (basidiospores).
Is a Hypha that ends in a Sporangium?
Sporangiophores are hyphae that are simple, unbranched tubular threads with rounded sporangia at their ends.
How are basidiospores produced?
A basidiospore is a reproductive spore produced by Basidiomycete fungi, a grouping that includes mushrooms, shelf fungi, rusts, and smuts. Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidia.
What do you call specialized roots like hyphae?
As a mold develops, the hyphae accumulate into a visible mass which is called a MYCELIUM. In some molds the lower hyphae will form small root-like structures called RHIZOIDS which help anchor the hyphae to the food source.
Which of the following is a basidium forming fungi?
Basidiomycota. The Basidiomycota bear their sexual spores externally on a usually club-shaped structure called a basidium, which is often borne on or in a fruiting body called a basidiocarp or basidiome (Fig.
What does a diploid cell inside a basidium produce as a result of meiosis?
Before spores can be produced, the two nuclei in the basidia fuse, making a diploid cell. The fusion of the nuclei in dikaryotic cells is called karyogamy. The resulting diploid cell then divides by meiosis to produce four haploid basidiospores, also shown in Figure above.
Which of the following is Basidium forming fungi?
Basidiomycota. The Basidiomycota bear their sexual spores externally on a usually club-shaped structure called a basidium, which is often borne on or in a fruiting body called a basidiocarp or basidiome (Fig. 7).
Which fungal group forms sporangia?
Asexual sporangia are commonly produced by the Chytridiomycota and Zygomycota. Although some similar structures, such as asci, are produced by members of the Dikarya they are never called sporangia and instead have their own special terms.
What structure is formed when plants and fungi weave their roots and hyphae together?
The hyphae enter the root and create swellings (vesicles) for nutrient storage structures where nutrients are transferred between fungus and plant (arbuscules). The names of these two structures are combined into “vesicular-arbuscular mycorrhizae” (VAM), the term for the most common type of mycorrhizal association.
Does rhizopus have septa in Sporangiophore?
The lack of septa enables the mold to be named coenocytic. Coenocytic means that the mold is a multinucleate cell enclosed by one cell wall that contains chitin. In asexual reproduction, special non-motile hyphae called sporangiophores produce sporangia that form in an upright fashion.
What kind of body does a basidium have?
Alternative Title: basidia. Basidium, in fungi (kingdom Fungi), the organ in the members of the phylum Basidiomycota (q.v.) that bears sexually reproduced bodies called basidiospores.
What is the function of the basidium in fungi?
Basidium, in fungi (kingdom Fungi), the organ in the members of the phylum Basidiomycota (q.v.) that bears sexually reproduced bodies called basidiospores. The basidium serves as the site of karyogamy and meiosis, functions by which sex cells fuse, exchange nuclear material, and divide to
Where are the spore bearing basidiums located on a mushroom?
Schematic showing a basidiomycete mushroom, gill structure, and spore-bearing basidia on the gill margins. A basidium (pl., basidia) is a microscopic sporangium (or spore-producing structure) found on the hymenophore of fruiting bodies of basidiomycete fungi which are also called tertiary mycelium, developed from secondary mycelium.
Is the basidium a stalked or sessile cell?
Sometimes the basidium ( metabasidium) develops from a probasidium, which is a specialized cell which is not elongated like a typical hypha. The basidium may be stalked or sessile.