Puccinia glomerata
| Puccinia glomerata | ||||||||||||
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Puccinia glomerata on Senecio sylvestris |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia glomerata | ||||||||||||
| Greville |
Puccinia glomerata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower genus Senecio . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia glomerata 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 glomerata grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown, the same applies to the uredia of the fungus and their uredospores. The parts of the species growing on both or mainly underside on the host leaves and their stalks are chestnut brown, powdery and uncovered. The golden to chestnut brown teliospores are two-celled, usually ellipsoidal and 23–41 × 14–27 µm in size. Its stalk is colorless and breaks off near the spore.
distribution
The known distribution area of Puccinia glomerata extends from western North America to Europe .
ecology
The host plants of Puccinia glomerata are various ragweeds ( Senecio spp.). 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 Telia, Spermogonia and Aecia and 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 .
