Exobasidium aequatorianum
| Exobasidium aequatorianum | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium aequatorianum | ||||||||||||
| Goméz & Kisimova-Horovitz |
Exobasidium aequatorianum is a fungus - kind of the family of Nacktbasidienverwandten (Exobasidiaceae) from the subdivision Ustilaginomycotina . It lives as an endoparasite on Vaccinium crenatum . Symptoms of the infection by the fungus are greatly enlarged, carmine-red colored leaves of the host plants. The mushroom species is widespread in large parts of Ecuador .
features
Macroscopic features
Exobasidium aequatorianum is initially invisible to the naked eye. Symptoms of the infestation Red colored leaves of infested plants enlarged by 30 to 50% and protruding mycelium on the underside of the leaves .
Microscopic features
The mycelium of Exobasidium aequatorianum , like all naked basidia, grows intercellularly and forms suction threads that grow into the host's storage tissue. The fungus has a monomitic hyphae structure made up of purely generative hyphae 1.2 to 2.3 µm thick. The two-, rarely three-pore, 13–22 × 6.3–7.4 µm large basidia, unseptate and cylindrical to club-shaped. They grow directly from the host epidermis or from stomata . The elliptical spores are hyaline , 12 × 4 µm in size. At first they are unsepted, when ripe they have a septum . Apparently there are no conidia .
distribution
The known distribution area of Exobasidum aequatorianum extends over large parts of Ecuador .
ecology
The host plant of Exobasidium aequatorianum is Vaccinium crenatum . 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. After they have fallen on a suitable substrate, these germinate in germ tubes, from which new mycelium then develops.
swell
- Luis D. Gómez, Liuba Kisimova-Horovitz: Basidiomicetes de Costa Rica. Nuevas especies de Exobasidium (Exobasidiaceae) y registros de Cryptobasidiales . In: Revista de Biología Tropical . 46, No. 4, 1998, pp. 1081-1093.