To use all functions of this page, please activate cookies in your browser.
With an accout for my.bionity.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Geosiphon is a genus of the phylum Glomeromycota, Order Archaeosporales, Family Geosiphonaceae.
Additional recommended knowledge
Geosiphon pyriformis is known for being the symbiont of Nostoc. The Geosiphon-Nostoc symbiosis, as by modern definitions, is not a lichen, since it is an intracellular association. Also by functional and evolutionary implications it is more comparable to the arbuscular mycorrhiza symbioses, then to lichens!
The Geosiphon-Nostoc symbiosis is the only known fungal endosymbiosis with cyanobacteria and is characterised by a "siphonal bladder" that is made of a swollen fungal hypha, 0.5-2 mm in size and growing on the soil surface. The upper 2/3 of the "bladder" contains the Nostoc filaments and Nostoc heterocysts, the lower 1/3 is filled with lipid droplets.
Geosiphon has a specialised bladder used to harbour cyanobacteria. Geosiphon pyriformis is not known to form arbuscular mycorrhiza.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Geosiphon". A list of authors is available in Wikipedia.|