What is the life cycle of Basidiomycota?
The lifecycle of basidiomycetes includes sexual and asexual reproduction (Figure 2). Most fungi are haploid through most of their life cycles, but the basidiomycetes produce both haploid and dikaryotic mycelia, with the dikaryotic phase being dominant.
Which is the dominant stage of the Basidiomycetes life cycle?
Mating in Basidiomycota involves fusion of haploid cells, but fusion of the nuclei is usually delayed until the basidia are formed. Thus, the dominant phase of the life cycle in most Basidiomycota is a dikaryon, in which the two nuclei brought together in mating exist side-by-side in each cell (Fig. 3A).
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.
What type of lifecycle do fungi have?
In the life cycle of a sexually reproducing fungus, a haploid phase alternates with a diploid phase. The haploid phase ends with nuclear fusion, and the diploid phase begins with the formation of the zygote (the diploid cell resulting from fusion of two haploid sex cells).
When in the basidiomycota life cycle is this organism 2n?
When the basidia cells combine their nuclei, the process is called karyogamy, and it results in a diploid cell – denoted as 2n. This diploid cell is now called a zygote, just like humans start out as zygotes when egg and sperm meet.
What is the difference between an ascus and a Basidium?
The ascus is a sac-like structure that bears reproductive cells. These cells produce sexual spores. Basidium is a club-shaped structure having sexual cells that produce sexual spores.
How many spores develop in basidia?
four
A basidium usually bears four sexual spores called basidiospores; occasionally the number may be two or even eight. In a typical basidium, each basidiospore is borne at the tip of a narrow prong or horn called a sterigma (pl. sterigmata), and is forcibly discharged upon maturity.
Which form within the basidiomycota life cycle is diploid?
Does mucor reproduce by conjugation?
Option C : Mucor is a type of fungus seen in soil and plant leaves. They belongs to the category of phycomycetes and they undergoes asexual reproduction by zoospores or aplanospores….
| (1) | (2) |
|---|---|
| Mucor | Agaricus |
| Reproduction by conjugation | Parasitic fungus |
| Ascomycetes | Basidiomycetes |