Puccinia spegazziniana
| Puccinia spegazziniana | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia spegazziniana | ||||||||||||
| De Toni |
Puccinia spegazziniana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the composites Eleutheranthera ruderalis , Wedelia acapucensis and Xexmenia hispida . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in South and Central America .
features
Macroscopic features
Puccinia spegazziniana 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 spegazziniana 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 mushroom growing on the underside of the leaves are cinnamon brown. Their colorless to yellowish uredospores are 19–23 × 22–26 µm in size, mostly lying broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are chocolate-brown, powdery and uncovered, they have golden paraphyses. The deep golden to clear maroon teliospores are two-celled, usually ovoid to almost ellipsoidal and 45–64 × 24–28 µm in size. Their stem is colorless and up to 70 µm long.
distribution
The known distribution area of Puccinia spegazziniana extends from South America to Guatemala .
ecology
The host plants of Puccinia spegazziniana are Eleutheranthera ruderalis , Wedelia acapucensis and Xexmenia hispida . 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 .