Exobasidium pieridis
| Exobasidium pieridis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium pieridis | ||||||||||||
| Li & Guo |
Exobasidium Pieridis is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It is an endoparasite of Pieris taiwanensis . Symptoms of infestation by the fungus are hypertrophic protuberances on the leaves of the host plant. The range of the species is in Japan .
features
Macroscopic features
Exobasidium pieridis 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
The mycelium of Exobasidium pieridis , like all naked basidia, 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 three, rarely four-pore, 40–70 × 5–8 µm large 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 .
distribution
The known distribution area of Exobasidum pieridis includes Japan .
ecology
The host plant of Exobasidium pieridis is Pieris taiwanensis . 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 conidia , 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.