Puccinia archibaccharidis
| Puccinia archibaccharidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia archibaccharidis | ||||||||||||
| Hennen et al. |
Puccinia archibaccharidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Archibaccharis hieracioides . 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 archibaccharidis 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 archibaccharidis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia are unknown. The aecia of the species growing on the underside of the host leaves are cylindrical and white. They have spherical, hyaline aeciospores with a warty surface that are 24–29 × 21–24 µm in size. The uredia of the mushroom are not known. Their cinnamon-brown uredospores are 22–27 × 22–27 µm in size, spherical to broadly ovate and spiky. The parts of the species growing underneath the leaves are dark brown, compact and uncovered. The teliospores are two-celled, usually long to broad ellipsoid and 49–60 × 25–32 µm in size. Their stem is colorless and up to 110 µm long.
distribution
The known distribution area of Puccinia archibaccharidis only includes the south of Mexico .
ecology
The host plant of Puccinia archibaccharidis is Archibaccharis hieracioides . 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 macrocyclical development cycle with spermogonia, aecia, telia and uredia and, as an auto-ecologic parasite, 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 .