Puccinia bewsiae
| Puccinia bewsiae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia bewsiae | ||||||||||||
| Cummins |
Puccinia bewsiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Bewsia biflora . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Malawi .
features
Macroscopic features
Puccinia bewsiae can only be recognized with the naked eye by means of the spore beds emerging 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 bewsiae 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 same applies to uredia of the fungus or its uredospores. The parts of the species growing on inflorescences and stems are chocolate brown, powdery and confluent. The golden to light chestnut brown teliospores are two-celled, sometimes vertically septate, ellipsoid to broadly ellipsoid and 34–39 × 24–29 µm in size. Their stem is up to 90 µm long.
distribution
The known distribution area of Puccinia bewsiae only includes Malawi .
ecology
The host plant of Puccinia bewsiae is Bewsia biflora . 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 their host are known; Uredien, Spermogonia and Aecien 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 .