Puccinia pappohori
| Puccinia pappohori | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pappohori | ||||||||||||
| Cummins |
Puccinia pappohori is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Pappohorum mucronulatum . 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 pappohori 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 pappohori 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 cinnamon-brown uredia of the fungus grow on both sides or only on the underside of the host's leaves. Their cinnamon - brown uredospores are egg-shaped to broadly ellipsoidal, 31–38 × 24–29 µm in size and finely spiky. The parts of the species growing on both sides or only underneath the leaves are black-brown and uncovered early. The hazelnut-brown teliospores of the fungus are two-celled, usually ellipsoidal to long-ellipsoidal and 29–36 × 18–23 µm in size. Their stalk is yellowish and up to 85 µm long.
distribution
The known distribution area of Puccinia pappohori only includes Bolivia .
ecology
The host plant of Puccinia pappohori is Pappohorum mucronulatum . 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 B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .