Puccinia chaseana
| Puccinia chaseana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia chaseana | ||||||||||||
| Arthur & Fromme |
Puccinia chaseana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Anthephora hermaphrodita . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. The distribution area extends from the Caribbean to Colombia .
features
Macroscopic features
Puccinia chaseana 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 chaseana grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia or aecidia are not known. The cinnamon-brown uredia grow on both sides of the host's leaves. Their uredospores are oval, 26-30 × 20-25 µm in size, golden to cinnamon-brown and finely spiky. The parts of the species are black and covered by the epidermis. The hazel-brown teleutospores are two-celled, club-shaped and angular and 36–45 × 18–21 µm in size; their stalk is up to 15 µm long and brownish.
distribution
The distribution area of Puccinia chaseana comprises the Caribbean Islands Cuba and Jamaica and extends on the continental mainland of Guatemala to Colombia ..
ecology
The host plant of Puccinia chaseana is Anthephora hermaphrodita . 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 with Telien and Uredien, which manages without change of host. Spermogonia and aecidia are absent.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .