Uromyces rudbeckiae
| Uromyces rudbeckiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces rudbeckiae | ||||||||||||
| Arthur & Holw. |
Uromyces rudbeckiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the slit-leaved coneflower ( Rudbeckia laciniata ) as well as of various goldenrods ( Solidago sp.). Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in East Asia and North America .
features
Macroscopic features
Uromyces rudbeckiae 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 Uromyces rudbeckiae grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are unknown. The same applies to their uredia , they may not be trained. The parts of the species, which usually grow on the underside of the surfaces of the host leaves, are cinnamon-brown, loosely to densely grouped, compact and uncovered. The yellowish to light golden brown teliospores are unicellular, usually ovoid to ovate, warty and mostly 23–30 × 12–17 µm in size. Their stalk is brownish and up to 55 µm long.
distribution
The known distribution area of Uromyces rudbeckiae includes Japan , China , Taiwan , Korea and the USA .
ecology
The host plant of Uromyces rudbeckiae is in the United States of Rudbeckia laciniata and other types of Rudbeckia . In its Asian distribution area, the mushroom grows on goldenrods . 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 probably microcyclical development cycle , of which only the telia and their host are known so far. It cannot therefore be said whether she will 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 .
Web links
- DF Farr, AY Rossman: Uromyces rudbeckiae. In: Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Retrieved February 24, 2013 .