Puccinia ishikariensis
| Puccinia ishikariensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia ishikariensis | ||||||||||||
| Ito |
Puccinia ishikariensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Moliniopsis japonica . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Japan .
features
Macroscopic features
Puccinia ishikariensis 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 ishikariensis 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 the top of the host leaves. Its golden to cinnamon brown uredospores are 26–30 × 21–25 µm in size, mostly ellipsoidal to ovoid and finely spiky. The bilateral growing parts of the species are black-brown and uncovered early. The brownish teliospores are two-celled, usually cylindrical to club-shaped and 42–54 × 14–20 µm in size. Their stalk is brown and up to 10 µm long.
distribution
The known distribution area of Puccinia ishikariensis only includes Japan .
ecology
The host plant of Puccinia ishikariensis is Limnodea arkansa . 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 .