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A zygospore is a diploid reproductive stage in the life cycle of many fungi and protists.Zygospores are created by the nuclear fusion of haploid cells. In fungi, zygospores are formed in zygosporangia after the fusion of specialized budding structures, from mycelia of the same (in homothallic fungi) or different mating types (in heterothallic fungi), and may be chlamydospores. [1]
An immature zygosporangium of the Rhizopus fungus forming from two fused gametangia, showing a "yoke" shape.. The name Zygomycota refers to the zygosporangia characteristically formed by the members of this clade, in which resistant spherical spores are formed during sexual reproduction.
The central cell, called the zygosporangium, is destined to become a spore. The zygosporangium is a unique structure to the Zygomycota and is easily recognizable in microscopy due to its characteristic dark color and spiky shape. The nuclei join in a process called karyogamy to form a zygote, which grows into a mature diploid zygomycete. A ...
The haploid nuclei within the zygosporangium then fuse into diploid nuclei. [5] When conditions improve, the zygosporangium germinates, undergoes meiosis and produces a sporangium, which releases spores.
Produced by zygosporangium: Zygomycetes: Zygospores on Rhizopus: Ascospores: Produced by ascus: Ascomycetes: Ascospores of Didymella Rabiei: Basidiospores: Produced by basidium: Basidiomycetes: Typical reproductive structure of a basidiomycete, including the basidiospore and basidium: Aecispores: Produced by aecium: Rusts and Smuts Aecia on ...
At the point where two complementary gametangia fuse, a thick-walled, spherical zygosporangium develops. The zygosporangium typically contains a single zygospore. Nuclear karyogamy and meiosis (sexual recombination) occur within it.
A sporangium at the end of a germ tube. Originates by germination of an oospore or of a zygosporangium. [158] germ tube Germ tubes forming in Candida albicans, at 600x magnification A short hypha that sprouts from the germ pore during germination. If conditions are favorable, will form a full mycelium.
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