Urediniospore

Urediniospores are the thinner-walled spores of some fungi: (rusts and smuts), from which the basidium arises.

Development

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

Morphology

• Urediniospores are usually consist of two dikaryote nuclei within one constricted cell resembling the number 8 without a septation. As the spores germinate, the nuclei undergo karyogamy and thereafter meiosis, giving rise to four-celled basidia with haploid basidiospores.

• They don't have a thick-capped telia as compared to teliospores.

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

See also

• Chlamydospore
• Urediniomycetes
• Teliospore
• Ustilaginomycetes

References

• C.J. Alexopolous, Charles W. Mims, M. Blackwell, Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5