Puccinia perotidis
| Puccinia perotidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia perotidis | ||||||||||||
| Cummins |
Puccinia perotidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Perotis indica . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is endemic to Sierra Leone .
features
Macroscopic features
Puccinia perotidis 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 perotidis 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 fungus grow on both sides of the host leaves and are up to 1.5 mm long. Their light cinnamon-brown uredospores are 24–27 × 18–22 µm in size, ovate to ellipsoidal and finely spiky. The growing of cladding tubes Telien the type are black brown, early openly lying and powdery. The dark hazel-brown teliospores are two-celled, usually ellipsoidal to club-shaped ellipsoidal and 30–36 × 19–25 µm in size. Its stem is yellowish to colorless and up to 65 µm long.
distribution
The known distribution area of Puccinia perotidis only includes Sierra Leone .
ecology
The host plant of Puccinia perotidis is Perotis indica . 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 .