Aecidium borrichiae
| Aecidium borrichiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Aecidium borrichiae | ||||||||||||
| Syd. & P. Syd. |
Aecidium borrichiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Borrichia frutescens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Alabama . Since only its secondary crop form is knownso far, it is classified in the genus Aecidium .
features
Macroscopic features
Aecidium borrichiae can only be recognized by the naked eye from the spore beds protruding on the surface of the host. They grow in nests that appear as yellowish to brown spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Aecidium borrichiae grows as with all Aecidium intercellular types, and forms Saugfäden that grow into the storage tissue of the host. Its spermogonia grow on both sides in small groups on the host leaves. The aecia of the species on the underside of the leaves are pale yellowish and cup-shaped. Their hyaline aecidiospores are 26–32 × 24–28 µm in size, angular, spherical to ellipsoid and warty. The uredia of the mushroom are not known, and it is possible that they are not developed. The Telien the type have not been observed to date.
distribution
The known distribution area of Aecidium borrichiae only includes Alabama .
ecology
The host plant of Aecidium borrichiae is Borrichia frutescens . The fungus feeds on the nutrients present in the storage tissue of the plants, its spore beds later break through the leaf surface and release spores. The species goes through a micro- or macrocyclical development cycle with Spermogonia, Aecien, Uredien and Telien. Whether she is going through a change of host cannot be determined due to the lack of telien and uredien.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .