Uromyces nassellae
| Uromyces nassellae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces nassellae | ||||||||||||
| Cummins |
Uromyces wet harboring is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Nassella pubiflora . 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
Uromyces nassellae 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 Uromyces wet harboring growing as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The yellowish uredia of the fungus grow on the upper side of the host leaves. Their hyaline to pale yellow uredospores are 30–35 × 23–26 µm in size, mostly broad ellipsoidal to ellipsoidal and spiky. The parts of the species are black-brown, powdery and uncovered early. The chestnut-brown teliospores are unicellular, usually ovoid to long ellipsoid and 30–38 × 21–24 µm in size. Their stem is brownish and up to 70 µm long.
distribution
The known distribution area of Uromyces nassellae only includes Bolivia .
ecology
The host plant of Uromyces nassellae is Nassella pubiflora . 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 goes through a development cycle of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be described so far.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .