Japanese Fungi on Plants No.12 before next top
Blumeria
graminis (DC.) Speer [Erysiphe graminis DC.]
Classification: Ascomycota, Pyrenomycetes, Erysiphales, Erysiphaceae
Widely distributed in Japan and causing powdery mildew in
gramineous plants. Infects various crops, barley, wheat and etc. in addition
to gramineous weeds, rescuegrass, wheatgrass, etc. Parasitic specialized strains
are differentited for each plant and grouped as formae specialis (f.
sp.). Produces ascocarps and conidia on leaves and absorbing nutrition by
haustoria in leaf tissue cells. Disperses by scattering conidia and ascospores. Never
grow on synthetic media.
Characteristics: Plant pathogen Symptom: JPEG
(Ryegrass, Powdery mildew, 54kb)
Morphology: Teleomorph: Ascocarp blackish brown, globose with with filamentous appendages, producing oblong asci inside. Ascospores hyaline, ellipsoid, 20-30 x 10-13 um insize. Anamorph: On hyaline conidiophores, producing catenate conidia of hyaline, oblong to cylindrical, not including fibrosin bodies, 32-44 x 12-15 um in size. Haustoria palmate. |
|||
Conidia | haustorium (staining) |
Herbarium specimen in NIAES
Specimen No. | Scientific name | Host name | Host scientific name | Symptoms | Geographical origin | Collected date | Collector |
103-2-7 | Blumeria graminis f.sp. hordei | Barley | Hordeum vulgare | Powdery mildew | Fukuoka | 1937 | Kawamura, E. |
103-1-13 | Blumeria graminis | Wheat | Triticum aestivum | " | Nishigahara, Tokyo | 1942.5.23 | Ozoe, S. |
103-1-14 | " | " | " | " | Hatano, Kanagawa | 1942.6.9 |
(Described by Tsukiboshi, T., NIAES, Microbial Systemtics Lab., 2002)
Copyright of the page belongs to Natural Resources Inventory Center, NIAES.