Archaeosporales

The Archaeosporales are an order of fungi that form a symbiosis ( mycorrhiza ) with many different plants.

Features

The fungi form in the soil and form a symbiosis with photoautotrophic blue-green algae or the mycorrhizal called symbiosis with plants in which arbuscules are formed. Vesicles can also be formed. The spores are colorless and go no reaction with Melzer's reagent a. Are formed either singly or in loose clusters glomoide spores in or on the soil surface or acaulosporoide spores. If acaulosporoide spores formed, then only individually formed in the soil.

From other orders of the Glomeromycota they differ genetically: ssu rRNA gene sequence you have the YCTATCYKYCTGGTGAKRCG corresponding to the homologous position 691 of the SSU rRNA sequence J01353 Saccharomyces cerevisiae.

Ecology and life

The fungi almost always grow in the soil. They always form a mycorrhizal symbiosis with a variety of plant species. They supply of plant nutrients (especially phosphorus ) and water and get themselves a part of the assimilates produced by photosynthesis. An exception is Geosiphon that are not living in symbiosis with higher plants but with blue-green algae.

System

The Archaeosporales were described in 2001 by Walker and Schuessler. At the moment (July 2013) are three genera in three families:

• Geosiphonaceae Geosiphon

• Ambispora

• Archaeospora: including the former genus Intraspora

Swell

• Arthur Schuessler, Daniel Schwarzott, Christopher Walker: A new fungal phylum, the Glomeromycota: phylogeny and evolution. In: Mycol. Res 105, 2001, pp. 1413-1421. doi: 10.1017/S0953756201005196
• LMU Munich: AMF species list, accessed on July 7, 2013
• LMU Munich: AMF taxonomy, accessed on July 7, 2013

• Mushrooms
• Fungi