Puccinia mcvaughii
| Puccinia mcvaughii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia mcvaughii | ||||||||||||
| JF Hennen , León Gallegos & Cummins |
Puccinia mcvaughii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Antibaccharis sescenticeps . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .
features
Macroscopic features
Puccinia mcvaughii 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 mcvaughii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia are unknown. The whitish aecia of the species grow underneath in groups on the surface of the host leaves. Their aeciospores are unknown, the same applies to the possibly missing uredia. The bilateral growing parts of the species are black-brown, powdery and uncovered. The clear maroon teliospores are two-celled, usually ellipsoidal, prickly and mostly 40–48 × 25–28 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia mcvaughii only includes an area near Campamento El Gallo .
ecology
The host plant of Puccinia mcvaughii is Antibaccharis sescenticeps . 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 goes through a development cycle with spermogonia, aecia and telia. As an auto-ecologic parasite, it does not change host .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .