Puccinia eragrostidis
| Puccinia eragrostidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia eragrostidis | ||||||||||||
| Petch |
Puccinia eragrostidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Eragrostis - sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South and East Asia .
features
Macroscopic features
Puccinia eragrostidis 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 eragrostidis 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 to orange uredia of the fungus grow on both sides or predominantly on the underside of the host leaves. Their light yellow to hyaline uredospores are 20-25 × 18-20 µm in size, broadly ellipsoidal to broadly ovate and finely spiky. The bilateral growing parts of the species are black-brown, compact and early exposed. The hazelnut brown teliospores are two-celled, ellipsoidal to broadly ellipsoidal and 30–38 × 19–22 µm in size. Its stem is yellowish to colorless and up to 130 µm long.
distribution
The known distribution area of Puccinia eragrostidis includes the Indian subcontinent and China .
ecology
The host plants of Puccinia eragrostidis are different Eragrostis 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 et al. 1971, ISBN 3-540-05336-0 .