Puccinia tarri
| Puccinia tarri | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia tarri | ||||||||||||
| Cummins & Husain |
Puccinia Tarri is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Aristida stipoides . Symptoms of infestation by this species are rust spots and pustules on the leaf surfaces of the host plants. She is an endemic of Sudan .
features
Macroscopic features
Puccinia tarri 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 Tarri 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 grow on the upper side of the host leaves. Their yellow to light golden brown uredospores are 32–45 × 18–23 µm in size, mostly long ellipsoidal to ellipsoidal and warty. The parts of the species grow on top of leaves and sheaths. The chestnut-brown teliospores are one- to two-celled, usually ellipsoidal to long-ellipsoidal and 40–55 × 21–27 µm in size. The stem is colorless to yellowish and up to 165 µm long.
distribution
The known distribution area of Puccinia tarri only includes Sudan .
ecology
The host plant of Puccinia tarri is Aristida stipoides . 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 .