Zasmidium citri (Whiteside) Crous, Persoonia 23: 105 (2009)
=Mycosphaerella citri Whiteside, Phytopathology 62: 263 (1972)
MycoBank number: MB 509716; Index Fungorum number: IF 509716; Facesoffungi number: FoF 10755;
Saprobic on dead stems of Dracaena sp. Sexual morph: Undetermined. (see Crous et al. 2009). Asexual morph: Mycelium external, smooth, septate, branch, wide hyphae. Conidiophores micronematous, arising from superficial mycelium, solitary, erect, straight to slightly curved, branched laterally or not, medium to dark brown, slightly wider at the base. Conidiogenous cells terminal, cylindrical to subcylindrical, tapering to a flattened apical region, smooth to finely verruculose, medium brown, 20 × 60 μm; scars thickened, somewhat darkened, 2–2.5 μm wide. Conidia broadly fusiform to obovoid, 0–1-septate, pale olivaceous, paler towards the apex; terminal conidia ovoid, 0-septate, pale olivaceous to hyaline, paler towards the apex, base truncate, extending up to 5 μm wide on each side, tapering towards the polar ends.
Material examined– Thailand, Nakhon Si Thammarat Province, Cha-uat distric, on dead leaves of Dracaena sp., 5 September 2018, Napalai Chaiwan, NSW1 (MFLU 18–***, holotype, MFLUCC 18–0903, living culture).
Host – Dracaena sp.—(This study).
Distribution – Thailand—(This study).
GenBank accession numbers – MFLU **; ITS: ***, ACT: ***
Notes – Zasmidium citri is reported from diferent hosts of (Musa in Florida, Acacia in Thailand, and Eucalyptus in Vietnam, and Aeglopsis, Citrus, Fortunella, Murraya, and Poncirus in North and South America (Pretorius et al. 2003, Crous et al. 2009) and in our study, we found the same fungus from Dracaena species. In a BLASTn search of GenBank, the ITS sequence had ***% similarity (**% nucleotide differences), while the act sequence had **% similarity (** nucleotide differences in 297 nucleotides). Thus, our strain is introduced as a new host record of Zasmidium citri from Dracaena host plants in Thailand.
Figure ***– Zasmidium citri (MFLUCC 18–0903, herbarium). a–b Appearance of mycelium on couture. c,d Conidiogenous cell attached on hypha e, f, g. Conidiophore i–j. Conidiogenous cell h. Conidia Scale bars: e,f=50 μm. g=20 μm. c,d,h,j=10 μm. i=5 μm.