Biology Reference
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Figure 5: Cyanolichens from Kenya (A) Coccocarpia erythroxyli. (B) Coccocarpia palmicola . Photographs courtesy J. Rikkinen,
Department of Biological and Environmental Sciences, PO Box 65, University of Helsinki, FIN-00014, Helsinki, Finland.
Color image of this figure appears in the color plate section at the end of the topic.
formation of fruiting bodies. The conidia released from pycnidia recognize a tiny thread (trichogyne)
on a lichen surface and attaches itself. Both these fuse to form a diploid cell. At this place a fruiting
body develops. Meiotic division is followed by a mitotic division, that results in the formation of
eight ascospores. The haploid ascospores during germination on suitable substrata fi nd a suitable
photobiont to form a new lichen thallus. Apothecia and perithecia are the two fruiting bodies that
are generally formed. Apothecia are disk or cup-shaped, macroscopic and form spores centrally
whereas perithecia are fl ask-shaped and are located on the upper surface opening by means of a
pore. Both apothecia and perithecia form asci with ascospores.
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