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From Wikipedia, the free encyclopedia

Urediniospores of 11 Milesina species. a Milesina blechni on Struthiopteris spicant b Milesina blechni on Struthiopteris spicant, cracked spore with released plasma, germ pores scattered c Milesina carpatica on Dryopteris filix-mas d Milesina exigua on Polystichum braunii, smooth surface e Milesina exigua on Polystichum braunii, smooth surface, plasma-free spore, germ pores bipolar f Milesina feurichii on Asplenium septentrionale with smooth areas on surface g Milesina feurichii on Asplenium septentrionale, cracked plasma-free spore, germ pores scattered h Milesina kriegeriana on Dryopteris carthusiana i Milesina magnusiana on Asplenium adiantum-nigrum with smooth areas on surface j Milesina magnusiana on Asplenium adiantum-nigrum, spore plasma-free, germ pores scattered k Milesina murariae on Asplenium ruta-muraria with smooth areas on surface l Milesina murariae on Asplenium ruta-muraria, cracked spore with released plasma, germ pores scattered m Milesina polypodii on Polypodium vulgare with smooth areas on surface n Milesina scolopendrii on Asplenium scolopendrium with smooth areas on surface o Milesina vogesiaca on Polystichum aculeatum, surface with very flat warts at the tip of the spore (arrow) p Milesina vogesiaca on Polystichum aculeatum, surface smooth (no warts visible at the tip), germ pores bipolar q Milesina whitei on Polystichum sp. r Milesina whitei on Polystichum setiferum, cracked spore with released plasma, germ pores scattered.

Urediniospores (or uredospores) are thin-walled spores produced by the uredium, a stage in the life-cycle of rusts.

Development

Urediniospores develop in the uredium, generally on a leaf's under surface.

Morphology

  • Urediniospores usually have two dikaryote nuclei within one cell. In mass they are usually pale brown in contrast to teliospores which are generally dark brown.

See also

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


This page was last edited on 20 October 2023, at 20:42
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