Narrow pore bogberry naked basidia
| Narrow pore bogberry naked basidia | ||||||||||||
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| Exobasidium expansum | ||||||||||||
| Nannfeldt |
The Schmalsporige noise Beer Nacktbasidie ( Exobasidium expansum ) is a fungal art from the family of Nacktbasidienverwandten (Exobasidiaceae). It lives as an endoparasite on wild berries ( Vaccinium uliginosum ) and infects the entire plant. Symptoms of the infestation by the narrow-pored bogberry bare-bones are mainly red leaf spots, which are followed by the appearance of the white mycelium on the plant surface. The species has been found in Northern and Central Europe.
features
Macroscopic features
The narrow-pored bogberry basidia is initially invisible to the naked eye, the initial symptoms are initially only light green or reddish spots on the leaves of the infected plant. The white mycelium of the fungus later emerges on the underside of the leaf between the leaf veins and from there overgrows the entire plant.
Microscopic features
The mycelium of the narrow-pore bogberry basid grows intercellularly and forms suction threads that grow into the host's storage tissue. Basidia are formed either individually or in bushes between the cells of the plant epidermis. The basidia are long, unseptate and narrow-clumped, the spores hyaline and thin-walled. The latter are 2.5–4 µm wide and have a septum when ripe .
distribution
In Europe, the distribution of the narrow-pore bogberry bare-bones is limited to Central and Northern Europe, it is linked to the occurrence of the bogberry ( Vaccinium expansum ).
ecology
The only known host of the narrow-pore bogberry bare-bones is the bogberry. The fungus feeds on the nutrients present in the storage tissue of the plants; initially limited to the leaves, then finally to the entire plant. The transmission from one plant to the next does not take place via underground root contact, but via flight of spores. The spores germinate in germ tubes or conidia , from which a new mycelium then develops.
swell
- Martin Beazor Ellis, J. Pamela Ellis: Fungi Without Gills (Hymenomycetes and Gasteromycetes): An Identification Handbook. Chapman and Hall, London 1990, ISBN 0-412-36970-2 .
- German Josef Krieglsteiner (Ed.): The large mushrooms of Baden-Württemberg . Volume 1: General Part. Stand mushrooms: jelly, bark, prick and pore mushrooms. Ulmer, Stuttgart 2000, ISBN 3-8001-3528-0 .