Archaeosporales

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Archaeosporales
Systematics
without rank: Opisthokonta
without rank: Nucletmycea
Empire : Mushrooms (fungi)
Department : Glomeromycota
Class : Arbuscular mycorrhizal fungi (Glomeromycetes)
Order : Archaeosporales
Scientific name
Archaeosporales
C. Walker & Schuessler

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 algae or the symbiosis called mycorrhiza with plants in which arbuscules are formed. Vesicles can also be formed. The spores are colorless and do not react with Melzer's reagent . Either glomoid spores are formed individually or in loose clusters in or on the soil surface, or acaulosporoid spores. If acaulosporoid spores are formed, they are only formed individually in the soil.

They differ genetically from other orders of the Glomeromycota : They have the ssu rRNA gene sequence YCTATCYKYCTGGTGAKRCG, which corresponds to the homologous position 691 of the Saccharomyces cerevisiae SSU rRNA sequence J01353.

Ecology and way of life

The mushrooms almost always grow in the ground. Always form a mycorrhiza - symbiosis with a variety of plant species. They supply the plant with nutrients (especially phosphorus) and water and, in turn, receive part of the assimilates produced by photosynthesis. An exception is Geosiphon , which does not enter into a symbiosis with higher plants but with blue-green algae .

Systematics

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

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