Puccinia sublesta
| Puccinia sublesta | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia sublesta | ||||||||||||
| Cummings |
Puccinia sublesta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Isachne beneckii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to the Philippines .
features
Macroscopic features
Puccinia sublesta 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 sublesta grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species are not yet known. The cinnamon-brown uredia grow on the underside of the host's leaves. Their cinnamon - brown uredospores are ovate to ellipsoidal, 19-25 × 15-19 µm in size and finely spiky. The parts of the species have not yet been described, but have been proven on the basis of their spores. The hazel-brown teliospores are two-celled, ovate to ellipsoidal and 24–28 × 18–20 µm in size; their stalk is hyaline, thin and up to 25 µm long.
distribution
The known distribution area of Puccinia sublesta is limited to the Philippines .
ecology
The host plant of Puccinia sublesta is the grass species Isachne beneckii . 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 apparently has a development cycle with Telien and Uredien, which manages without change of host; Spermogonia and aecia are apparently absent.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .