Puccinia oryzopsidis
| Puccinia oryzopsidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia oryzopsidis | ||||||||||||
| Sydow , P. Sydow & EJ Butler |
Puccinia oryzopsidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Oryzopsis molinioides . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to India .
features
Macroscopic features
Puccinia oryzopsidis can only be recognized with the naked eye by 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 oryzopsidis 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 and uredospores of the fungus. Some spores that were found in the holotype and could belong to this species as uredospores were yellowish, spiky and 25–29 × 22–24 µm in size. The parts of the species growing on both sides and on sheaths are chocolate brown, uncovered early, compact and powdery. The light chestnut brown teliospores are two-celled, ellipsoidal to long-ellipsoidal and 40–48 × 22–27 µm in size. Its stem is yellowish to colorless and up to 160 µm long.
distribution
The known distribution area of Puccinia oryzopsidis only includes the Indian Kumaon (state of Uttarakhand ).
ecology
The host plant of Puccinia oryzopsidis is Oryzopsis molinioides . 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 1971, ISBN 3-540-05336-0 .