Puccinia tornata
| Puccinia tornata | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia tornata | ||||||||||||
| Arthur & Holway |
Puccinia tornata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Hordeum andinum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Bolivia .
features
Macroscopic features
Puccinia tornata 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 tornata 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-brown uredia of the fungus usually grow on the upper side of the host leaves. Its yellowish uredospores are 26–30 × 20–24 µm in size, mostly ellipsoidal to ovoid and finely spiky. The parts of the species, which usually grow on the top of the leaves, are chocolate brown, powdery and uncovered early. The hazel-brown teliospores are two-celled, ellipsoidal and 32–38 × 20–23 µm in size. Their stalk is yellowish to colorless and 50 µm long.
distribution
The known distribution area of Puccinia tornata only includes Bolivia .
ecology
The host plant of Puccinia tornata is the chicken millet Hordeum andinum . 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 1971, ISBN 3-540-05336-0 .