Periconia cortaderiae
Periconia cortaderiae Thambug. & K.D. Hyde, in Thambugala, Wanasinghe, Phillips, Camporesi, Bulgakov, Phukhamsakda, Ariyawansa, Goonasekara, Phookamsak, Dissanayake, Tennakoon, Tibpromma, Chen, Liu & Hyde, Mycosphere 8(4): 734 (2017)
Index Fungorum number: IF553165 Facesoffungi number: FoF05710
Sexual morph: Undetermined. Asexual morph: Colonies on the substratum superficial, numerous, effuse, black, floccose. Mycelium immersed on the substrate, composed of septate, branched, smooth, dark hyphae. Conidiophores 100–225 × 8.5–11 µm, macronematous, mononematous, septate, branched, erect, mostly slightly flexuous to curved, dark brown, forming sphaerical heads at apex, arising from a stromatic base. Conidiogenous cells 4.5–5.2 × 4.1–5.6 µm (x̄ = 4.9 × 5.1 µm, n = 20), mono- to polyblastic, discrete, terminal, globose, light brown. Conidia (5.5–)6–9(–12) × (4.5–)5–8 µm (x̄ = 7.8 × 6.4 µm, n = 50), solitary or catenate, in acropetal chains, subglobose to globose, occasionally ellipsoidal to cylindrical, light brown to moderately brown, verruculose.
Culture characteristics: Colonies on PDA reaching 68–74 mm diam. after 3 weeks at room temperature (20–30 °C). Colony medium sparse, circular, flattened, surface smooth, edge entire, velvety to woolly; from above, sectoring, with a part of cream to pale yellowish and yellowish- green to dark grey, with small white tufts in another part; from below, pale yellowish at the margin, sectoring at the centre, with a part of yellowish to orange-yellow and dark brown in another part; not producing pigmentation on agar medium.
Habitat: -
Known hosts: On dead stems and leaves of Cortaderia sp. (Poaceae, Thailand) and Caragana
arborescens (Fabaceae, Yunnan, China).
Known distribution: -
Material examined: CHINA, Yunnan Province, Kunming City, Kunming Institute of Botany, on dead hanging branches of Caragana arborescens (Fabaceae), 2 April 2017, R. Phookamsak, KIB017 (KUN-HKAS 102240), living culture, KUMCC 18-0174 = MFLUCC18-0667 (KIB017A), KUMCC 18-0175 = MFLUCC18-0668 (KIB017B).
GenBank Accession No: ITS: MH892348, LSU: MH892401 (MFLUCC 18-0667); ITS: MH892349, LSU: MH892402, TEF1-a: MH908964 (MFLUCC18-0668).
Notes: Phylogenetic analyses of a concatenated LSU, ITS and TEF1-a sequence dataset show that our strains (MFLUCC 18-0667 and MFLUCC 18-0668) form a well resolved clade, clustering with Periconia cortaderiae (100% ML and 1.00 BYPP). A comparison of ITS and TEF1-a nucleotide base pair indicates that our strains are identical to the type strain of P. cortaderiae, which is not significantly different (2/520 bp in ITS and 4/830 bp in TEF1-a). We therefore, identify our isolates as P. cortaderiae and report its occurrence on Caragana arborescens in Yunnan, China for the first time. Our isolate has shorter conidiophores (400–800 µm high, holotype) and slightly larger conidia (4–6.6 × 4.1–7.1 µm, holotype) (Thambugala et al. 2017). Periconia species are morphologically variable in different hosts and geographic distributions, but the molecular data of informative genes can clarify their conspecificity. Therefore, more informative genes such as RPB2 and TUB2 are needed in further studies of this genus.
Figure X. Periconia cortaderiae (KUN-HKAS102240). a Appearance of fungal colonies on host substrate. b, c Conidiophores. d–f Conidiophores and conidiogenous cells. g–j Conidia. Scale bars b, c = 50 μm, d–f = 20 μm, g, j = 10 μm, h, i = 5 μm.
Reference:
Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, et al. (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity (2019) 95:1–273
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