Exobasidium gomezii
| Exobasidium gomezii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exobasidium gomezii | ||||||||||||
| Chlebicki & Chlebická |
Gomezii Exobasidium is a mushroom art family of Nacktbasidienverwandten (Exobasidiaceae) from the order Ustilaginomycotina . It is an endoparasite of Pernettya mucronata . Symptoms of infestation by the fungus are a large enlargement of the leaves of the host plants and the emergence of mycelium on their undersides. The species is common in Patagonia .
features
Macroscopic features
Exobasidium gomezii is initially invisible to the naked eye. Symptoms of the infestation are hairy and greatly enlarged leaves (about twice the size) and, in later stages of infestation, the emergence of mycelium on the underside of the leaves.
Microscopic features
As with all naked basidia , the mycelium of Exobasidium gomezii grows intercellularly and forms suction threads that grow into the host's storage tissue. The basidia, which are rarely three-, mostly four-pore, 20.6–29.3 × 6.3–6.7 µm in size, are long, unseptate and cylindrical to club-shaped. They grow directly from the host epidermis or from stomata . The club-shaped to ellipsoidal spores are hyaline and 8.4–14.8 × 2.4–4.7 µm in size. At first they are unsepted, when ripe they have no or one or rarely three septa . The conidia are hyaline, spindle-shaped to teardrop-shaped and 6.1–7.2 × 1–2.2 μm in size.
distribution
The known distribution area of Exobasidum gomezii is in the Patagonian Andes of Chile .
ecology
The host plant of Exobasidium gomezii is Pernettya mucronata . 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 germ tubes and conidia, from which new mycelium then develops.
swell
- Andrzej Chlebicki, Markéta Chlebická: A new fungus, Exobasidium gomezii, from Chilean Patagonia . In: Nova Hedwigia . 85, No. 1-2, 2007, pp. 145-149.