Puccinia allii
| Puccinia allii | ||||||||||||
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Puccinia allii |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia allii | ||||||||||||
| ( Candolle ) Rudolphi |
Puccinia allii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various leeks . Symptoms of the infestation by the species are rust spots on the leaves of the host plants. The distribution area includes a Holarctic area.
features
Macroscopic features
Puccinia allii 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 reddish to brown spots on the leaf surfaces.
Microscopic features
The mycelium of Puccinia allii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Pyknia and Aecidia are not known for the species. The uredia are elongated to round. Their uredospores are spherical over ovate to ellipsoidal, 18–32 × 18–24 µm in size and warty. They have five to ten germ pores. The parts of the species are rounded or oblong. The teleutospores are mostly two-, rarely three- or unicellular, variably shaped and 25–85 × 15–26 µm in size; their stem is short and colorless.
Species delimitation
Puccinia porri is very similar and is often considered a synonym. This has one to two-celled teliospores in the telia , which have no paraphyses .
distribution
The species area of Puccinia allii covers the entire northern hemisphere.
ecology
The host plants of Puccinia allii are various leeks ( Allium 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 has a development cycle with uredien and telien. The fungus overwinters on infested plant remains or on leek stalks that remain in the bed over winter, or on chives growing nearby . Infested plant residues should therefore not be placed on the compost .
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland (= contributions to the cryptogam flora of Switzerland . Volume XII ). Commission publisher Buchdruckerei Büchler & Co, Bern 1959.
Individual evidence
- ^ DM Jennings, BV Ford-Lloyd, GM Butler: Morphological analysis of spores from different Allium rust populations. In: Mycol. Res. 1990; 94 (1), pp. 83-93. On-line
