Puccinia gymnopogonicola
| Puccinia gymnopogonicola | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia gymnopogonicola | ||||||||||||
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Puccinia gymnopogonicola is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Gymnopogon burchellii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South America .
features
Macroscopic features
Puccinia gymnopogonicola 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 gymnopogonicola 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 yellowish to colorless uredia of the fungus grow on the upper side of the host leaves. Their yellowish uredospores are 16–23 × 13–16 µm in size, almost spherical to ovoid and finely spiky. The bilateral growing parts of the species are blackish, powdery and exposed early. The golden to light hazel-brown teliospores are two-celled, ellipsoidal to long-ellipsoidal and 28–41 × 18–22 µm in size. Their stem is colorless to brownish and 80 µm long.
distribution
The known distribution area of Puccinia gymnopogonicola includes Brazil and Argentina .
ecology
The host plant of Puccinia gymnopogonicola is Gymnopogon burchellii . 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 .