Puccinia kuehnii
| Puccinia kuehnii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia kuehnii | ||||||||||||
| ( Kruger ) Butler |
Puccinia Kuehnii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Saccharum and Sclerostachya fusca from the sweet grass subfamily Panicoideae . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. The distribution area is the southern regions of the Old World.
features
Macroscopic features
Puccinia kuehnii 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 Kuehnii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia or aecidia are not known. The yellow to cinnamon-brown uredia grow on the underside of the host's leaves. Your uredospores are egg to pear-shaped, 30–43 × 17–26 µm in size and finely spiky. The parts of the species are black-brown and break out early. The teleutospores are two-celled, elongated-club-shaped and 25–40 × 10–18 µm in size; their stem is short and hyaline .
distribution
The known distribution area of Puccinia kuehnii includes Africa, southern Asia, Japan and Australia .
ecology
The host plants of Puccinia kuehnii are various types of sugar cane and Sclerostachya fusca . 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 has a development cycle with Telien and Uredien, which manages without change of host. Spermogonia and aecidia are absent. Along with Puccinia melanocephala, it is the most important harmful rust fungus in sugar cane cultivation.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .
Individual evidence
- ^ L Dixon: Systematic Mycology and Microbiology Laboratory - Invasive Fungi Fact Sheets . In: US Department of Agriculture, Agricultural Research Service (Ed.): Food Security . August. Retrieved on October 31, 2012. ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
