Erysiphales » Erysiphaceae » Erysiphe

Erysiphe mori

Erysiphe mori (I. Miyake) U. Braun & S. Takam.,Schlechtendalia 4: 21, 2000.

Basionym: Uncinula mori I. Miyake, Bot. Mag. Tokyo 21: 1, 1907.

Mycelium epiphyllous, effuse or in irregular patches, almost persistent. Hyphal cells 3 6μm wide. Hyphal appressoria lobed to multilobed, solitary or in opposite pairs. Conidiophores 50-75μm long, mostly arising laterally from the mother cells. Foot cells 35 45 × 8 10μm, curved at the base, followed by two shorter cells, forming conidia singly. Conidia 30 37 × 16-20μm, ellipsoid-ovoid to subcylindrical. Germ tubes terminal or almost so, short or very short. Conidial appressoria lobate to multilobate (Pseudoidium-type). Chasmothecia 70 120μm diam, scattered to aggregated. Peridium cells 10 20μm wide, not conspicuous, irregularly polygonal. Appendages 9-15, equatorial, stiff to flexuous, often abruptly bent in their upper half, length 1-1.5 times the chasmothecial diam, width equal throughout or somewhat increasing from about 5 to 7 mm near the base up to 10 mm towards the tip, but then narrowing towards the coiled apex, aseptate or with a single septum at the base, hyaline, sometimes slightly brown at the base, walls thin above, thick towards the base, smooth or faintly rough; apices uncinate to circinate when mature, mostly decreasing somewhat in width towards the tip. Asci 43 65 × 35 55μm, 3 7 per chasmothecium, broadly ellipsoid-obovoid, saccate, short-stalked, 26, mostly 3 5-spored. Ascospores 19 35 × 11 19μm, ellipsoid-ovoid, colorless.


  Material examined: On Tectona grandis L. f. (Verbena-ceae), THAILAND, Chiang Mai, Suthep, 28 Dec 2013, J. Meeboon, TSU-MUMH1489, GenBank accession number: LC175811; Kanchanaburi Province, Huay Mae Khamin Waterfall, Si Sanat, 22 Feb 2014, J. Meeboon, TSU-MUMH5753.


Notes: The phylogenetic tree showed that the specimen on M. alba is nested within sequences of E. mori with 100% BS support, showing that this specimen belongs to E. mori. The morphological characters of this specimen are also in good agreement with E. mori. Erysiphe mori has been recorded on Morus (alba, australis [¼ bombycis], cathayana [¼ tiliifolia], nigra, rubra, serrata, sp.) and is distributed in temperate zones of Asia (China, India, Himachal Pradesh, Japan, Kazakhstan, Korea, Uzbekistan) and Europe (European part of the Russia, Ukraine) (Braun and Cook 2012). This is the first record of E. mori from Thailand.



Figure X. Erysiphe mori on Morus alba. A: Conidiophores. B: Conidia with germ tubes. C: Appressoria. Bar: 20μm.






Figure X. Erysiphe mori on Morus alba. A: Chasmothecium. B: Asci and ascospores. Bars: A 50 mm, B 20μm.


Reference: Meeboon J, Takamatsu S. (2017) New records of Erysiphe sect. Uncinula spp.(Erysiphales) from Thailand and E. liquidambaris var. acalycinae var. nov. Mycoscience 58:236 241.


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Thailand Science Research and Innovation (TSRI),

project entitled:

"The future of specialist fungi in a changing climate: baseline data for generalist and specialist fungi associated with ants Rhododendron species and Dracaena species"

(Grant No. DBG6080013)

"Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region"

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