Puccinia decolorata
| Puccinia decolorata | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia decolorata | ||||||||||||
| Arthur & Holway |
Puccinia decolorata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of brome Bromus coloratus . 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 decolorata 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 decolorata 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 uredia are cinnamon brown and grow on the underside of the host's leaf surfaces. Their golden to cinnamon - brown uredospores are mostly broad-oval, 23–27 × 19–21 µm in size and finely spiky. The parts are black-brown, uncovered early and compact. The hazel-brown teliospores are two-celled, usually ellipsoidal and 29–34 × 18–22 µm in size; their stalk is yellowish and up to 65 µm long.
distribution
The known distribution area of Puccinia decolorata only includes Bolivia .
ecology
The host plant of Puccinia decolorata is the brome Bromus coloratus . 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 .