Puccinia dolosoides
| Puccinia dolosoides | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia dolosoides | ||||||||||||
| Cummins |
Puccinia dolosoides is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the millet Paspalum comersonii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is native to Central Africa and Sri Lanka .
features
Macroscopic features
Puccinia dolosoides 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 dolosoides 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-brown uredia of the species grow on the underside of the leaves of the host plants. Their golden to cinnamon - brown uredospores are broadly ellipsoidal to ovate, 33–36 × 21–27 µm in size and finely spiky. The mostly leaf underside growing Telien are black brown, long covered and compact. The hazelnut-brown teliospores are two-celled, usually oblong to club-shaped and 34–43 × 19–23 µm in size; their stalk is brown and is up to 10 µm long.
distribution
The known distribution area of Puccinia dolosoides includes Central Africa and Sri Lanka .
ecology
The host plant of Puccinia dolosoides is Paspalum comersonii . 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 .