Japanese Fungi on Plants No.65 before next top
Ustilago
affinis Ellis & Everh.
Classification: Basidiomycota, Ustilaginomycetes, Ustilaginales,
Ustilaginaceae
Collected in Okinawa Pref., the most southern part of Japan. Causes loose
smut on St. Augustin grass. Destroys the floral parts, exposing the naked
rachis and disperses by scattering dark brown smut spores mass. Grows by
budding of sporidia like yeasts on synthetic media.
Characteristics: Plant pathogen Symptom: JPEG
(St. Augustine grass, Loose smut, 19kb)
 |
 |
Morphology: Smut spores globose to subglobose, light brown to yellow brown, 4-7 x 7-8 um in size with very minutely echinulate (smooth under light-microscopy) surface. Producing oblong sporidia on basidia of 2-5 um in length at germination. |
|
| smut spores | sporidia |
Herbarium specimen in NIAES
| Specimen No. | Scientific name | Host name | Host scientific name | Symptoms | Geographical origin | Collected date | Collector |
| 135-1-22 | Ustilago affinis | St. Augustin grass | Stenotaphrum secundatum | Loose smut | Nakijin, Okinawa | 1998.5 | Okumura, K. |
(Described by Tsukiboshi, T., NIAES, Microbial Systemtics Lab., 2002)
Copyright of the page belongs to Natural Resources Inventory Center, NIAES.
