Puccinia tolimensis
| Puccinia tolimensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia tolimensis | ||||||||||||
| Mayor |
Puccinia tolimensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Eupatorium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in South America .
features
Macroscopic features
Puccinia tolimensis can only be recognized with the naked eye by means of the spore beds emerging 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 tolimensis 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 parts of the species, which predominantly grow on the underside of the host leaves, are cinnamon-brown, compact and uncovered, they are in dense groups. The golden to light cinnamon-brown teliospores are two-celled, usually narrowly ovate and 40–47 × 19–22 µm in size. Its stem is yellowish to light brown and up to 20 µm long.
distribution
The known distribution area of Puccinia tolimensis extends from South America to Guatemala , an isolated occurrence is in New York .
ecology
The host plants of Puccinia tolimensis are various water dosts ( Eupatorium 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 microcyclic development cycle without uredia , of which only Telia 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 .