Highlights of the Didymellaceae - Studies in Mycology

AveSkAMp et al.
Fig. 4. Phoma pedeiae (CBS 124517). A–C. Fourteen-day-old colonies on OA (A), MEA (B) and CHA (C). D. Pycnidia. E. Section of the pycnidial wall. F. Conidia. Scale bars:
D = 100 μm; E–F = 10 μm.
Phoma bellidis Neerg., Friesia 4: 74. 1950.
Specimens examined: The Netherlands, from seed of Bellis perennis, 1985, G.H.
Boerema, CBS H-5200, culture CBS 714.85 = PD 74/265; from Bellis sp., 1994, J.
de Gruyter, PD 94/886.
Phoma digitalis Boerema apud Boerema & Dorenbosch,
Verslagen Meded. Plziektenk. Dienst Wageningen 153: 19.
1979.
Specimen examined: The Netherlands, Ommen, from Digitalis sp., 1990, J. de
Gruyter, CBS 109179 = PD 90/835-1.
Phoma senecionis P. Syd., Hedwigia, Beibl. 38: 136. 1899.
Specimen examined: New Zealand, Raetihi, from a stem of Senecio jacobaea, Feb.
1977, S. Ward, CBS 160.78 = LEV 11451.
Group I:
Group I comprises three Phoma taxa (Ph. acetosellae, Ph.
macrostoma var. macrostoma and var. incolorata) that were
placed in the section Phyllostictoides on the basis of the presence
of septate conidia (Gruyter et al. 2002), but also accommodates
Ph. viburnicola. The placement of this species in section Phoma
can be debated, as a single septate conidium has been observed
in strain CBS 500.91, one of the strains that was designated as
reference strain (De Gruyter & Noordeloos 1992). Also D. exigua
(CBS 183.55 - Neotype) is found in this clade, the type species of
the genus Didymella (De Gruyter et al. 2009), which does however
not produce an anamorph state. The four species do not exhibit
a shared pathological feature or geographic origin. The variety
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incolorata differs from var. macrostoma in lacking a red to violet
pigment in the hyphae and any reaction to NaOH.
Phoma acetosellae (A.L. Sm. & Ramsb.) Aa & Boerema,
in De Gruyter, Boerema & Van der Aa, Persoonia 18(1): 16.
2002.
Basionym: Phyllosticta acetosellae A.L. Sm. & Ramsb., Trans. Brit.
Mycol. Soc. 4: 173. 1912.
Specimens examined: France, Corrèze, Monteil sur Bois, from a leaf of Rumex
acetosella, 1976, H.A. van der Aa, CBS H-16138, culture 631.76. The Netherlands,
Baarn, from a stem of Rumex hydrolapathum, March 1996, H.A. van der Aa, CBS
179.97.
Phoma macrostoma var. incolorata (A.S. Horne) Boerema
& Dorenb., Persoonia 6(1): 55. 1970.
Basionym: Polyopeus purpureus var. incolorata A.S. Horne, J. Bot.
58: 240. 1920.
Specimens examined: Switzerland, Vierwaldstättersee, near Brunnen, from a
leaf of Acer pseudoplatanus, Oct. 1968, J. Gemmen, CBS H-20240, culture CBS
223.69. The Netherlands, from Malus sylvestris, 1983, J. de Gruyter, CBS 109173
= PD 83/908.
Phoma macrostoma var. macrostoma Mont., Annls Sci.
Nat., Bot. III 11: 52. 1849.
Specimens examined: Germany, near München, from the bark of Larix decidua,
1995, G.J. Verkley, CBS 482.95. The Netherlands, Wageningen, from wood of
Malus sylvestris, Sep. 1969, G.H. Boerema, CBS H-16431, culture CBS 529.66
= PD 66/521.