Aecidium archibaccharidis
| Aecidium archibaccharidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Aecidium archibaccharidis | ||||||||||||
| Cummins |
Aecidium archibaccharidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower Archibaccharis serratifolia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Guatemala . Since only its secondary crop form is knownso far, it is classified in the genus Aecidium .
features
Macroscopic features
Aecidium archibaccharidis can only be recognized with the naked eye by means of 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 archibaccharidis grows as with all Aecidium TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Its spermogonia usually grow on the underside of the host leaves. The aecia of the species on the underside of the leaves are cup-shaped. Their hyaline to pale yellowish aecidiospores are 18–25 × 18–23 µm in size, spherical 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 archibaccharidis only includes Guatemala .
ecology
The host plant of Aecidium archibaccharidis is Archibaccharis serratifolia . 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. Due to the lack of aecia and spermogonia, it is not possible to determine whether it changes host .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .