Langbahn Team – Weltmeisterschaft

Soredium

Soredia on Evernia prunastri

Soredia are common reproductive structures of lichens.[1] Lichens reproduce asexually by employing simple fragmentation and production of soredia and isidia.[2] Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria or green algae.[1] These can be either scattered diffusely across the surface of the lichen's thallus, or produced in localized structures called soralia.[3] Fungal hyphae make up the basic body structure of a lichen.[2] The soredia are released through openings in the upper cortex of the lichen structure.[1] After their release, the soredia disperse to establish the lichen in a new location.[2]

References

  1. ^ a b c Eichorn, Susan E.; Evert, Ray F.; Raven, Peter H. (2005). Biology of Plants. New York: W.H. Freeman and Company. pp. 289. ISBN 978-1572590410.
  2. ^ a b c Cook, Rebecca; McFarland, Kenneth (1995). General Botany 111: Laboratory Manual. Knoxville: University of Tennessee. p. 104.
  3. ^ Brodo, Irwin W.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. New Haven, Connecticut: Yale University Press. p. 762. ISBN 0-300-08249-5.


Quelle: http://en.wikipedia.org/wiki/Soredium