Puccinia espinosarum
| Puccinia espinosarum | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia espinosarum | ||||||||||||
| Dietel & Holway |
Puccinia espinosarum is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Eupatorium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Central America .
features
Macroscopic features
Puccinia espinosarum 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 Puccinia espinosarum grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown. The uredia of the fungus growing on both sides of the host leaves are cinnamon brown. Their cinnamon to golden brown uredospores are 32–38 × 20–24 µm in size, asymmetrical, transverse ellipsoid and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The dark maroon teliospores are two-celled, usually broadly ellipsoidal and 42–50 × 33–38 µm in size. Their stem is colorless and up to 160 µm long.
distribution
The known distribution area of Puccinia espinosarum extends from Guatemala to central Mexico .
ecology
The host plants of Puccinia espinosarum are different aquatic species . 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 development cycle of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .