Exobasidium aequale
| Exobasidium aequale | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium aequale | ||||||||||||
| Saccardo |
Exobasidium aequale is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It is an endoparasite of the bilberry ( Vaccinium myrtillus ). Symptoms of the infection by the fungus are discolored leaf tops and enlarged leaves of the host plants. The species isnative to Europe and Greenland .
features
Macroscopic features
Exobasidium aequale is initially invisible to the naked eye. Symptoms of the infestation are a yellowish-white to light red discoloration of the upper surface of the leaves, enlarged leaves and, in the late stage, protruding mycelium on the underside of the leaf .
Microscopic features
The mycelium of Exobasidium aequale grows as with all exobasidium intercellular and forms Saugfäden that grow into the storage tissue of the host. The two-pore, 6–8 × 4–6 µm large basidia are unseptate. They grow directly from the host epidermis or from stomata . The variably shaped spores are hyaline and 15–28 × 6–9 µm in size. They have no septa . Conidia are not known.
distribution
The known distribution area of Exobasidum aequale comprises a European area and Greenland .
ecology
The host plant of Exobasidium aequale is the bilberry ( vaccinium myrtillus ). The fungus feeds on the nutrients present in the storage tissue of the plants, its basidia later break through the leaf surface and release spores. The spores germinate into germ tubes or conidia, from which new mycelium then develops.
swell
- John Frithiof Nannfeldt: Exobasidium, a taxonomic reassessment applied to the European species . In: Symbolae Botanicae Upsalienses . tape 23 (2) , 1981, pp. 1-71 .