Puccinia desmanthodii
| Puccinia desmanthodii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia desmanthodii | ||||||||||||
| Dietel & Holway |
Puccinia desmanthodii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Desmanthodium fruticosum and Desmanthodium ovatum . 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 desmanthodii 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 desmanthodii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia are not known. The aecia of the species growing on both sides of the host leaves are short, white and stand in small groups. They have 17–22 × 14–19 µm, almost spherical and hyaline aeciospores with a warty surface. The fungus does not develop uredia . The leaves of the species growing in dense groups on the underside of the leaves are black-brown and covered, they have brownish paraphyses . The light maroon teliospores are two-celled, usually sub-cylindrical and 40–55 × 12–18 µm in size. Their stalk is brown and up to 25 µm long.
distribution
The known distribution area of Puccinia desmanthodii extends in Mexico from the state of Nayarit to Oaxaca .
ecology
The host plants of Puccinia desmanthodii are Desmanthodium fruticosum and Desmanthodium ovatum . 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, but does not change host.
Taxonomy
The species was first described in 1901 by Paul Dietel and Edward Willet Dorland Holway .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .