Puccinia arundinellae
| Puccinia arundinellae | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia arundinellae | ||||||||||||
| Barclay |
Puccinia arundinellae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass genus Arundinella . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South Africa and Southeast Asia .
features
Macroscopic features
Puccinia arundinellae 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 arundinellae 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 uredia of the fungus usually grow on the upper side of the host's leaves. Their hyaline uredospores are broadly ellipsoidal to ovate, 23–30 × 20–24 µm in size and finely spiky. The bilateral growing parts of the species are black-brown, compact and uncovered early. The clear hazel-brown teliospores are two-celled, sometimes longitudinally septate, usually ovate to ellipsoidal and 40–56 × 22–30 µm in size. Its stem is yellowish to colorless and up to 160 µm long.
distribution
The known distribution area of Puccinia arundinellae includes South Africa , India and Myanmar .
ecology
The host plants of Puccinia arundinellae are various Arundinella species. 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 .