Heterosporicola chenopodii
Heterosporicola chenopodii (Westend.) Crous, in Wijayawardene et al., Fungal Diversity: 10.1007/s13225-017-0386-0, [209] (2017).
≡ Phyllosticta chenopodii Westend., Bull. Acad. R. Sci. Belg., Cl. Sci., sér. 2 2(7): 567 (1857).
Index Fungorum number: IF 821708; Facesoffungi number: FoF 09784 , Fig. 1, 2
Description:
Saprobic or pathogenic on stems leaves. Sexual morph: Unknown. Asexual morph: Coelomycetous. Conidiomata 150–200 μm diam., 125–155 μm high, pycnidial, solitary to gregarious, immersed to semi-immersed, globose to subglobose, black with one or two distinct ostiole. Ostiole 45–50 μm sometimes papillate or with elongated neck. Conidiomata wall 5.9–8.3 μm, composed of 3–5 layers of cells of textura angularis, pale yellowish brown. Conidiogenous cells phialidic, subglobose to short conical, hyaline, smooth. Conidia 13−20 × 3.2−4.2 µm (x̄ = 17.1 × 3.5 µm, n = 10), hyaline, aseptate, subcylindrical to obclavate, oblong to ellipsoidal, base truncate, straight to curved or slightly curved, with two to many guttules.
Material examined: Belgium, from leaf spots in Chenopodium album (Amaranthaceae), Piré L (BR5020155058522, holotype).
Fig. 1 Phyllosticta chenopodii (BR5020155058522, holotype). a–d Herbarium material and appearance of conidiomata on the host surface. e Squash mount of conidioma. f Section through conidiomata. g Peridium. h–j Conidiogenesis. k Conidia. Scale bars: c, d = 500 μm, e = 20 μm, f = 50 μm, g–i, k = 10 μm, j = 5 μm.
Fig. 2 Conidia of Heterosporicola chenopodii (redrawn from Phoma chenopodiicola Fig. 25 in De Gruyter et al. 1993). Scale bar = 10 µm.
Importance and distribution
Heterosporicola comprises two species. Heterosporicola beijingense is known on Chenopodium quinoa (Amaranthaceae) in Asia (China) while H. chenopodii is known on living leaves of Chenopodium viride and C. urbicum (Amaranthaceae) in Europe (Belgium).
References
Aveskamp MM, de Gruyter J, Woudenberg JHC, Verkley GJM, Crous PW. 2010 – Highlights of the Didymellaceae: a polyphasic approach to characterise Phoma and related pleosporalean genera. Studies in Mycology 65, 1–60.
Boerema GH. 1997 – Contributions towards a monograph of phoma (coelomycetes) – V. subdivision of the genus in sections. Mycotaxon 64, 321–333.
De Gruyter J, Noordeloos ME, Boerema GH. 1993 – Contributions towards a monograph of Phoma (Coelomycetes) – I. 2. Section Phoma: additional taxa with very small conidia and taxa with conidia up to 7 μm long. Persoonia 15, 369–400.
De Gruyter J, Woudenberg JHC, Aveskamp AA, Verkley GJM et al. 2013 – Redisposition of phoma-like anamorphs in Pleosporales. Studies in Mycology 75, 1–36.
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