Exobasidium jamaicense
| Exobasidium jamaicense | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium jamaicense | ||||||||||||
| Goméz & Kisimova-Horovitz |
Exobasidium jamaicense is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It lives as an endoparasite on Lyonia jamaicensis . Symptoms of infection by the fungus are reddish galls on the leaves of the host plants. The species is endemic to Jamaica .
features
Macroscopic features
Exobasidium jamaicense 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
As with all naked basidia , the mycelium of Exobasidium jamaicense 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 1.8 to 2.1 µm thick. The four-pore, 20–30 × 4.7–6 µm large basidia are unseptate and cylindrical to club-shaped. They grow directly from the host epidermis or from stomata . The elliptical spores are hyaline , 14–15 × 3–3.5 µm in size. Conidia have not yet been observed.
distribution
The known distribution area of Exobasidum jamaicense covers the southwest of Jamaica .
ecology
The host plant of Exobasidium jamaicense is Lyonia jamaicensis . 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.