Common cranberry nude basidia
|Common cranberry nude basidia|
Leaf galls caused by the common lingonberry naked basid ( Exobasidium vaccinii )
|( Fuckel ) Voronin|
The common lingonberry naked basidia ( Exobasidium vaccinii ) is a smut fungus species from the family of naked basidia relatives (Exobasidiaceae). It lives as an endoparasite on cranberries ( Vaccinium vitis-idaea ) and infects their leaves. Symptoms of infestation by the common lingonberry naked basid are bright red leaves and heavily thickened, mycelium-coated galls on the underside of the leaves. The species is proven in the entire distribution area of the lingonberry.
The common lingonberry naked basid is initially invisible to the naked eye. The initial symptoms of the infestation appear in the form of bright red, yellowish-edged spots on the upper side of the leaf. Later, about 1 cm wide, strongly thickened pink galls form on the underside of the leaf, on the surface of which the white mycelium breaks through. From there, it eventually overgrows the entire leaf.
The mycelium of Common Cranberry Naked Basid grows intercellularly and forms suction threads that grow into the host's storage tissue. The four-sported basidia are 40–50 × 4–5 µm in size, unseptate and narrow-lobed. They are formed either individually or in clusters between the cells of the plant epidermis. The cylindrical spores are hyaline , thin-walled and measure 11–20 × 2–4 µm. At maturity they are septate from one to six.
The sole host of the common lingonberry naked basid is the lingonberry. 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 occurs through flight of spores. The spores germinate in 8–11 × 1 µm conidia , from which a new mycelium then develops.
- 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 .