Puccinia paspalina
| Puccinia paspalina | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia paspalina | ||||||||||||
| ( Sydow & Sydow ) Cummins |
Puccinia paspalina is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Paspalum - millet . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is spread from Africa via Sri Lanka and Japan to Australia .
features
Macroscopic features
Puccinia paspalina 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 paspalina 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 cinnamon-brown uredia of the species grow on both sides or only on the underside of the leaves of the host plant. Their golden to cinnamon - brown uredospores are broadly ellipsoidal to ovate, 24–31 × 20–24 µm in size and finely spiky. The mostly leaf underside growing Telien are black brown, long covered and compact. The yellow to golden teliospores are one to two-celled, usually club-shaped and 38–46 × 24–26 µm in size; their stalk is colorless and up to 10 µm long.
distribution
The known distribution area of Puccinia paspalina extends from Malawi and Uganda via Sri Lanka and Japan to Australia .
ecology
The host plants of Puccinia paspalina are several Paspalum - millet . 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 .