Puccinia dietelii
| Puccinia dietelii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia dietelii | ||||||||||||
| Saccardo & Sydow |
Puccinia dietelii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of nettle leaves as well as of Dactylotenium aegypticum and the sweet grass genus Chloris . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Africa and America .
features
Macroscopic features
Puccinia dietelii 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 dietelii 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 15–18 × 12–15 µm , colorless aeciospores with a wrinkled surface. The yellow to light brown uredia of the species grow on both sides of the leaves of the host plant. Their colorless to golden uredospores are usually ovate to ellipsoidal, 17–26 × 15–21 µm in size and finely spiky. The bilateral growing parts of the species are blackish, powdery and uncovered early. The dark hazel-brown teliospores of the fungus are two-celled, usually broadly ellipsoidal and 24–35 × 17–24 µm in size. Their stem is golden and up to 75 µm long.
distribution
The known distribution area of Puccinia dietelii includes Africa and America from Argentina northward to the USA .
ecology
The host plants of Puccinia dietelii are for haplonts nettle leaves ( Acalypha spp.) And aegypticum Dactylotenium and various Chloris 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 .