Puccinia pinaropappi
Puccinia pinaropappi | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Puccinia pinaropappi | ||||||||||||
P. Syd & Syd |
Puccinia pinaropappi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Pinaropappus roseus . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Texas .
features
Macroscopic features
Puccinia pinaropappi 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 pinaropappi 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 growing on both sides of the host leaves are cinnamon brown. Their light cinnamon brown to golden uredospores are 24–28 × 22–25 µm in size, spherical to broadly ellipsoidal and finely spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal to broadly ellipsoidal, fine-black and mostly 32–38 × 24–28 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia pinaropappi only includes Texas .
ecology
The host plant of Puccinia pinaropappi is Pinaropappus roseus . 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, Aecien, Telien and Uredien.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .