Puccinia tripsacicola
| Puccinia tripsacicola | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia tripsacicola | ||||||||||||
| Cummins |
Puccinia tripsacicola is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Tripsacum dactyloides . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South America.
features
Macroscopic features
Puccinia tripsacicola 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 tripsacicola 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 of the species grow on the upper side on the leaves of the host plants. Their golden uredospores are mostly elongated, 42–66 × 14–26 µm in size and finely spiky. The underside growing parts are black-brown, uncovered early and small. The hazelnut-brown teliospores are one to two-celled, usually ellipsoid and 29–41 × 20–27 µm in size; their stalk is colorless and up to 100 µm long.
distribution
The known distribution area of Puccinia tripsacicola includes Ecuador and Venezuela .
ecology
The host plant of Puccinia tripsacicola is the sweet grass Tripsacum dactyloides . 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 .