Puccinia trixitis
| Puccinia trixitis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia trixitis | ||||||||||||
| ( F. Kern & Kellerm. ) Arthur |
Puccinia trixitis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the composites Trixis radialis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Guatemala .
features
Macroscopic features
Puccinia trixitis can only be recognized with the naked eye by 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 trixitis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are not yet known. The uredia of the fungus growing underneath the leaves are dark chestnut brown. Their golden to light brown uredospores are 26–32 × 21–26 µm in size, broadly ellipsoidal to spherical and spiky. The parts of the species that grow underneath the leaves are chestnut brown, compact and uncovered. The golden-brown teliospores are two-celled, usually ovate to ellipsoidal and 28–37 × 18–20 µm in size. Their stem is colorless and up to 50 µm long.
distribution
The known distribution area of Puccinia trixitis includes Guatemala and Veracruz in Mexico.
ecology
The host plant of Puccinia trixitis is Trixis radialis . 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 of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .
Individual evidence
- ↑ GBIF Portal: Ocurrence Search, accessed on January 17, 2013 ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. .
