Exobasidium triseptatum
| Exobasidium triseptatum | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium triseptatum | ||||||||||||
| Ramakrishnan & Ramakrishnan |
Exobasidium triseptatum is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It is an endoparasite of Vaccinium leschnaultii . Symptoms of infection by the fungus are hypertrophic , gall-like spots on the leaves of the host plant and protruding mycelium on the underside of the leaf. The range of the species is in India .
features
Macroscopic features
Exobasidium triseptatum cannot be seen with the naked eye. Symptoms of the infestation are hypertrophic , gall-like spots of light green to pinkish-red color on the upper surface of the leaves of the host plant. In later stages of infestation, mycelium emerges on the underside of the leaf .
Microscopic features
As in all naked basidia , the mycelium of Exobasidium triseptatum grows intercellularly and forms suction threads that grow into the host's storage tissue. The fungus has a monomitic hypha structure made up of purely generative hyphae without buckles . The four-pore basidia are cylindrical to club-shaped and simply septate at the base. They grow directly from the host epidermis . The spores are hyaline , moon-shaped, thin-walled and 14–28 × 3–8 µm in size. When ripe they have three septa .
distribution
The known distribution area of Exobasidum triseptatum is in southern India .
ecology
The host plant of Exobasidium triseptatum is Vaccinium leschnaultii . 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 into oidia , from which new mycelium then develops.
swell
- Taracad Subromania Ramakrishnan, K. Ramakrishnan: Exobasidium from South India . In: Proceedings of the Indian Academy of Sciences: Plant Sciences . 29, No. 1, 1949, pp. 5-12. doi : 10.1007 / BF03049983 .