Puccinia chloridis
| Puccinia chloridis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia chloridis | ||||||||||||
| Spegazzini |
Puccinia chloridis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of silk plants and the sweet grass genera Bouteloua , Chloris and Trichloris . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in North and South America.
features
Macroscopic features
Puccinia chloridis 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 chloridis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the fungus have 18–26 × 16–23 µm large, hyaline aeciospores. The orange uredia of the species mostly grow on the top of the leaves of the host plant. Their light yellow to colorless uredospores are usually broadly ovate to spherical, 18–23 × 16–22 µm in size and finely spiky. The parts of the species growing underneath the leaves are blackish and powdery. The hazelnut-brown teliospores of the fungus are two-celled, usually long ellipsoid and 26–40 × 16–25 µm in size. Their stem is golden brown and up to 100 µm long.
distribution
The known distribution area of Puccinia chloridis extends from Argentina to the southern USA .
ecology
The host plants of Puccinia chloridis are for haplonts milkweed ( Asclepias spp.), Matelea types, and the orchid genus Sarcostoma and Bouteloua - Chloris - and Trichloris TYPES 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 has a development cycle with Telien, Uredien, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .