Puccinia tristachyae
| Puccinia tristachyae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia tristachyae | ||||||||||||
| Doidge |
Puccinia tristachyae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the Sphenostylis and Tristachya species. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. Their distribution area includes southern Africa.
features
Macroscopic features
Puccinia tristachyae 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 tristachyae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aeciospores of the species are elongated to ellipsoidal, hyaline , wrinkled and 26–40 × 16–20 µm in size. The yellow uredia usually grow on the underside of the host's leaves. Their cinnamon to hazelnut brown uredospores are usually broadly ellipsoidal to ovate, 27–31 × 19–26 µm in size and finely spiky. The underside of the leaves of the species are exposed early and compact. The golden or hazel-brown teliospores are two-celled, usually elliptical in shape and 40–54 × 18–23 µm in size; their stalk is yellowish and up to 50 µm long.
distribution
The known distribution area of Puccinia tristachyae covers an area in southern Africa .
ecology
The host plants of Puccinia tristachyae are Sphenostylis TYPES for haploid and various Tristachya grasses for dikaryotic . 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 spermogonia , Aecien , Telien and Uredien and goes through a host change.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .