Puccinia grindeliae
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| Puccinia grindeliae | ||||||||||||
| Peck |
Puccinia grindeliae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite numerous Asteraceae genera . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in North America .
features
Macroscopic features
Puccinia grindeliae can only be recognized with the naked eye from 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 grindeliae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your aecia have 24–36 × 20–26 µm large aeciospores with a warty surface. Uredien are not available. The parts of the species growing on both sides and on stems are black-brown, compact and uncovered. The golden to chestnut brown teliospores are one to four-celled, usually long ovoid to long ellipsoid and 40–58 × 20–26 µm in size. Their stem is colorless and up to 200 µm long.
distribution
The known distribution area of Puccinia grindeliae extends from Guatemala to central Mexico .
ecology
The host plants of Puccinia grindeliae are many different species of daisy family . 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.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .