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Urediniospore

 

 
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Urediniospore
 
 
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Urediniospores are the thinner-walled spore
Spore

In biology, a spore is a reproduction structure that is adapted for biological dispersal and surviving for extended periods of time in unfavorable conditions....
s of some fungi: (rusts
Rust (fungus)

Rusts are fungi of the order Uredinales. Many of these species are plant parasites. Some are superficially similar to the smut , although their relation to each other is not clear....
 and smuts
Smut (fungus)

The smuts are fungus, mostly Ustilaginomycetes , that cause plant disease.Smuts affect grasses, notably including cereal crops such as maize. They initially attack the plant's reproductive system, forming galls which darken and burst, releasing fungal spores which infect other plants nearby....
), from which the basidium
Basidium

A basidium is a microscopic, spore-producing structure found on the hymenophore of fruiting bodies of basidiomycete fungi. The presence of basidia is one of the main characteristic features of the Basidiomycota....
 arises.








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Urediniospores are the thinner-walled spore
Spore

In biology, a spore is a reproduction structure that is adapted for biological dispersal and surviving for extended periods of time in unfavorable conditions....
s of some fungi: (rusts
Rust (fungus)

Rusts are fungi of the order Uredinales. Many of these species are plant parasites. Some are superficially similar to the smut , although their relation to each other is not clear....
 and smuts
Smut (fungus)

The smuts are fungus, mostly Ustilaginomycetes , that cause plant disease.Smuts affect grasses, notably including cereal crops such as maize. They initially attack the plant's reproductive system, forming galls which darken and burst, releasing fungal spores which infect other plants nearby....
), from which the basidium
Basidium

A basidium is a microscopic, spore-producing structure found on the hymenophore of fruiting bodies of basidiomycete fungi. The presence of basidia is one of the main characteristic features of the Basidiomycota....
 arises.

Development

Urediniospores develop in the uredium at the bottom of a leaf's surface.

Morphology

  • Urediniospores are usually consist of two dikaryote
    Dikaryon

    Dikaryon is from Greek language, di meaning 2 and karyon meaning Nut , referring to the cell nucleus.The dikaryon is a nuclear feature which is unique to some fungi, in which after plasmogamy the two compatible nuclei of two cell pair off and cohabit without karyogamy within the cells of the hyphae, synchronous dividing so that...
     nuclei within one constricted cell resembling the number 8 without a septation
    Septate

    Septate is a morphology term used in biology in two different instances.*In human biology, it is used to describe a divided uterus.*In mycology, it is used to describe the condition of spores or hyphae in terms of having or lacking a Septum to divide cells....
    . As the spores germinate, the nuclei
    Cell nucleus

    In cell biology, the nucleus , also sometimes referred to as the "control center", is a membrane-enclosed organelle found in all eukaryote cell ....
     undergo karyogamy
    Karyogamy

    Karyogamy is the fusion of pronuclei of two cell s, as part of syngamy. It is one of the two major modes of reproduction in fungi. It is also the fusion of the pronuclei of two cells, as occurs in fertilization or true bacterial conjugation......
     and thereafter meiosis
    Meiosis

    In biology or life science, meiosis is a process of reductional division in which the number of chromosomes per cell is halved. In animals, meiosis always results in the formation of gametes, while in other organisms it can give rise to spores....
    , giving rise to four-celled basidia with haploid basidiospore
    Basidiospore

    A basidiospore is a reproductive spore produced by Basidiomycete fungi. Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidium....
    s.


  • They don't have a thick-capped telia as compared to teliospore
    Teliospore

    Teliospore is the thick-walled resting spore of some fungi , from which the basidium arises....
    s.


  • Looks like a balloon pinched in the middle, (like an 8 without septation
    Septation

    Septation may refer to:*Cell division*Formation of the septum during heart development...
    )


See also

  • Chlamydospore
    Chlamydospore

    A Chlamydospore is the thick-walled big resting spore of several kinds of fungi. It is the life-stage which survives in unfavourable conditions, such as dry or hot seasons....
  • Urediniomycetes
    Urediniomycetes

    Urediniomycetes is a diverse class of fungi that includes several important Phytopathology causing forms of fungal Rust . It is the only class in the subdivision Teliomycotina of basidiomycetes....
  • Teliospore
    Teliospore

    Teliospore is the thick-walled resting spore of some fungi , from which the basidium arises....
  • Ustilaginomycetes
    Ustilaginomycetes

    Ustilaginomycetes is the class of true smut fungi. They are plant parasites with about 1400 recognised species in 70 genera....