Puccinia subtilipes
| Puccinia subtilipes | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia subtilipes | ||||||||||||
| Spegazzini |
Puccinia subtilipes is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grasses Leptochloa scabra and L. virgata . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in Central and South America .
features
Macroscopic features
Puccinia subtilipes 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 subtilipes grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The yellow uredia of the fungus grow on both sides of the host leaves. Their hyaline to yellowish uredospores are 16–18 × 13–15 µm in size, spherical to ovate and finely spiky. The bilateral growing parts of the species are blackish, powdery and exposed early. The hazel-brown teliospores are two-celled, broad ellipsoid to long ellipsoid and 23–31 × 18–22 µm in size. Their stem is yellowish to golden and 130 µm long.
distribution
The known distribution area of Puccinia subtilipes extends from Central America and the Caribbean to Argentina .
ecology
The host plants of Puccinia subtilipes are Leptochloa scabra and L. virgata . 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 has a development cycle of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .