Meadow rust
| Meadow rust | ||||||||||||
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Puccinia poae-nemoralis on meadow grass |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia poae-nemoralis | ||||||||||||
| Otth |
The Wiesenrispenrost ( Puccinia poae-nemoralis ) is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of common barberry and Berberis jaeschkeana and sweet grasses of the Aveneae and Poeae tribes . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common all over the world.
features
Macroscopic features
Puccinia poae-nemoralis 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 poae-nemoralis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species grow locally on barberries, their aeciospores are warty and 20–27 × 19–23 µm in size. The yellowish to yellowish brown uredia of the fungus grow mainly on the upper leaf surfaces of the host plant and have numerous paraphyses . Their light golden to hyaline uredospores are broadly ellipsoidal to broadly ovate, 22–27 × 18–23 µm in size and densely spiky. The parts of the species, mostly growing on the underside of the leaves, are blackish and covered, they have brownish paraphyses. The golden to hazel-brown teliospores are two-celled, usually long ovate to club-shaped and 35–50 × 17–23 µm in size; their stalk is brownish and up to 15 µm long.
distribution
The known distribution area of Puccinia poae-nemoralis includes the temperate regions around the world.
ecology
The host plants of Puccinia poae-nemoralis are Berberis jaeschkeana and Common barberry ( Berberis vulgaris ) for the haploid , sweet grasses of the tribes Aveneae and Poeae for dikaryotic , especially from the genera Poa , Agrostis , Alopecurus , Anthoxanthum , Festuca , Lolium , Phleum and Trisetum . In Central Europe it often attacks the meadow panicle ( Poa pratensis ) and related species. 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 Aecien, Spermogonia, Telien and Uredien and undergoes a host change.
Systematics
The meadow rust was first scientifically described by Gustav Heinrich Otth in 1861 . It is partially considered a variety of Puccinia brachypodii .
literature
- George Baker Cummins : The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .
Individual evidence
- ↑ Recognize - understand - avoid plant diseases : Puccinia poae-nemoralis GH Otth.
- ↑ George B. Cummins and HC Greene (1966) A Review of the Grass Rust Fungi That Have Uredial Paraphyses and Aecia on Berberis - Mahonia . Mycologia 58: 702-721. On-line
Web links
- (Obligatory) Phytoparasitic small mushrooms: Puccinia poae-nemoralis : Description and pictures on the homepage of Julia Kruse