Puccinia paroselae
| Puccinia paroselae | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia paroselae | ||||||||||||
| Cummins |
Puccinia paroselae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume Dalea mollis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to California .
features
Macroscopic features
Puccinia paroselae 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 paroselae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are so far unknown. The uredia of the fungus grow predominantly on the underside of the surfaces of the host leaves and on stems and are cinnamon brown. Their light cinnamon-brown uredospores are 22–28 × 17–20 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing on the underside of the leaves and on stems are chocolate brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal, prickly and mostly 37–42 × 22–26 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia paroselae only includes California .
ecology
The host plant of Puccinia paroselae is Dalea mollis . 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 , of which only Uredien and Telien are known so far. It is therefore impossible to say whether she will 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 .