Puccinia penniseti-lanati
| Puccinia penniseti-lanati | ||||||||||||
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| Puccinia penniseti-lanati | ||||||||||||
| Ahmad |
Puccinia penniseti-Lanati is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Pennisetum lanatum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Pakistan .
features
Macroscopic features
Puccinia penniseti-lanati 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 penniseti-Lanati 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 grow on both sides or only on top of the host leaves. Its yellow-brown uredospores are 19–24 × 14–18 µm in size, mostly broadly ellipsoidal to ovoid and finely spiky. The mostly underside of the leaf growing parts of the species are black-brown and long covered. The golden to light hazelnut brown teliospores are two-celled, variable in shape and 33–42 × 17–23 µm in size. Their stalk is hyaline to yellowish and up to 15 µm long.
distribution
The known distribution area of Puccinia penniseti-lanati only includes Pakistan .
ecology
The host plant of Puccinia penniseti-lanati is Pennisetum lanatum . 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 .