Passalora bacilligera
Passalora bacilligera (Mont. & Fr.) Mont. & Fr., Syll. gen. sp. crypt. (Paris): 305 (1856).
≡ Cladosporium bacilligerum Mont. & Fr., in Montagne, Annls Sci. Nat., Bot., sér. 2 6: 31 (1836).
Index Fungorum number: IF 232516; Facesoffungi number: FoF 11191, Fig. 1, 2
Description:
Associated with leaf spots. Sexual morph: Unknown. Asexual morph: Mycelium superficial, hyphae hyaline or pale brown pigmented, branched, septate, smooth. Stromata lacking. Conidiophores 101−115 × 5.2−8.1 µm (x̄ = 110.9 × 6.3 µm, n = 20), solitary or aggregated in dense fascicles, or synnematous conidiomata, arising from internal hyphae, sometimes from superficial hyphae pale olivaceous or brown, unbranched or branched, aseptate or pluriseptate, smooth, sometimes slightly verruculose, straight or curved. Conidiogenous loci conspicuous, somewhat thickened and darkened-refractive, usually planate. Conidia 28−50 × 5.2−9 µm (x̄ = 42.2 × 6.1 µm, n = 20), solitary or sometimes catenate, pale olivaceous to pale brown, amero- to scolecosporous, aseptate to pluriseptate, euseptate or sometimes with a few distosepta, smooth or finely verruculose; hilum slightly thickened and darkened.
Material examined: Unknown location, on Alnus glutinosa (Betulaceae), unknown collector (F. Europaei-2682).
Fig. 1 Passalora bacilligera (F. Europaei-2682). a–c Herbarium material. d–g Conidiophores. h–n Conidia. Scale bars: c = 500 μm, d–n = 20 μm.
Fig. 2 Passalora bacilligera (LBL, Białowieża National Park, leg. W. Mułenko, redrawn from Videira et al. 2017). a Leaf spots. b Conidia. c Conidiophores. Scale bars: a = 20 mm, b, c = 10 μm.
Importance and distribution
There are 725 Passalora epithets in Index Fungorum (2022), but many species have been transferred to other genera such as Asperisporium, Catenulocercospora, Cercospora, Cercosporidium, Cladosporium, Clarohilum, Clypeosphaerella, Deightonomyces, Distomycovellosiella, Fusicladiella, Fusoidiella, Graminopassalora, Madagascaromyces, Marssonina, Micronematomyces, Mycovellosiella, Pleuropassalora, Pluripassalora, Pruniphilomyces, Pseudocercospora, Ragnhildiana, Stigmina, Venturia and Verrucisporota. Passalora comprises around 557 species known on a wide range of hosts and geographical locations. Many species lack sequence data. Passalora is a complex genus that needs revision.
References
Crous PW, Schoch CL, Hyde KD, Wood AR et al. 2009 – Phylogenetic lineages in the Capnodiales. Studies in Mycology 64, 17–47.
Crous PW, Shivas RG, Quaedvlieg W, vander Ban KM et al. 2013 – Fungal Planet description sheets: 154–213. Persoonia 31, 188–296.
Świderska U. 2015 – Cercosporoid fungi of Poland. Monographiae Botanicae 105, 1–166.
Thomma BP, van Esse HP, Crous PW. 2005 – Cladosporium fulvum (syn. Passalora fulva), a highly specialized plant pathogen as a model for functional studies on plant pathogenic Mycosphaerellaceae. Molecular Plant Pathology 6, 379–393.
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