Exobasidium ovalifoliae
| Exobasidium ovalifoliae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium ovalifoliae | ||||||||||||
| Li & Guo |
Exobasidium ovalifoliae is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It is an endoparasite of Lyonia ovalifolia var. Elliptica . Symptoms of infestation by the fungus are hypertrophic protuberances on the leaves of the host plant. The range of the species is in China .
features
Macroscopic features
Exobasidium ovalifoliae cannot be seen with the naked eye. Symptoms of the infestation are hypertrophic , oval protuberances on the leaves of the host plant. They are concave on the top and convex on the underside. In the late stage of the infestation, both sides are overgrown by mycelial carpets .
Microscopic features
As with all naked basidia , the mycelium of Exobasidium ovalifoliae 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 two- to rarely three-pore, 40–70 × 5–8 µm wide basidia are cylindrical to club-shaped and simply septate at the base. They grow directly from the host epidermis . The spores are hyaline , sausage-shaped to egg-shaped, thin-walled and 12–20 × 3–4.2 µm in size. When ripe they have one to three, rarely five, septa . Conidia are absent.
distribution
The known range of Exobasidum ovalifoliae includes Yunnan and probably Taiwan as well .
ecology
The host plant of Exobasidium ovalifoliae is Lyonia ovalifolia var. Elliptica . 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 falling on a suitable substrate, these germinate into germ tubes , from which new mycelium then develops.
swell
- Li Zhenying, Lin Guo: Two new species of Exobasidium (Exobasidiales) from China . In: Mycotaxon . 104, 2008, pp. 331-336.