Pleosporales » Didymosphaeriaceae » Torula

Torula chromolaenae

Torula chromolaenae Jun F. Li, Phook., Mapook & K.D. Hyde, in Li, Phookamsak, Jeewon, Bhat, Mapook, Camporesi, Shang, Chukeatirote, Bakhali & Hyde, Mycol. Progr. 16(4): 454 (2017)

MycoBank number: MB 819536       Facesoffungi number: FoF 02713


Saprobic on a dead branch of Chromolaena odorata Linn. (Asteraceae). Sexual morph: Undetermined. Asexual morph: Colonies discrete onhost, black,powdery.Mycelium immersed on the substrate, composed of septate, branched, smooth, light brown hyphae. Conidiophores 5–6.3 μm long × 3.5–4.6 μm diam (x = 5.8 × 4 μm, n = 10), macronematous, mononematous, solitary, erect, light brown, verruculose, thick-walled, consisting of one cell, without apical branches, ellipsoid to subglobose, arising from hypha. Conidiogenous cells (3.5–)4.5–5.1 μm long × 4.8–5.6 μm wide (x = 4.7 × 5.4 μm, n = 10), polyblastic, terminal, light brown to brown, paler at apex, smooth to minutely verruculose, thick-walled, doliiform. Conidia 12.1–16.5 μm long × (3.6–)4.1–5 μm wide (x = 14.5 × 4.3 μm, n = 20) catenated, acrogenous, simple, phragmosporous, light brown to brown, smooth to minutely verruculose, 2–3-septate, rounded at both ends, often paler at apex, slightly constricted at some septa, chiefly subcylindrical. Conidial secession schizolytic.


Cultural characteristics: Conidia germinating on PDA within 14 h and germ tubes produced from the apex. Colonies growing on PDA, reaching 5 cm in 14 days at 30 °C, mycelium partly immersed to superficial, slightly effuse, cottony, with regular edge, greyish-white to grey; sexual morph not formed within 60 days.


Material examined: THAILAND, Chiang Mai, Mae Taeng (Mushroom Research Center), on a dead branch of Chromolaena odorata (Asteraceae), 26 December 2015, Ausana Mapook, MRC1 (MFLU 16–2819, holotype), extype living culture KUMCC 16–0036, MFLUCC; (isotype in HKAS, under the code of HKAS 96299).


Notes: Torula chromolaenae, described herein as a new species, is distinct from other species in having smaller and doliiform conidiogenous cells and 2–3-septate conidia.

Figure X. Torula chromolaenae (MFLU 16–2819, holotype) a Colonies on dead branch of Chromolaena odorata. b,  Conidia in catenated chain. c, k Branched chains of conidia. d–h Conidiophores with conidiogenous cells. i–j Budding on conidia. m Conidiophores. n–p Conidia. q Germinated conidia. Scale bars (a) 500 μm, (q) 10 μm, (b–p) 5 μm.


Referenc: Hyde KD, de Silva NI, Jeewon R, Bhat DJ, et al. 2020 – AJOM new records and collections of fungi: 1-100. Asian Journal of Mycology 3(1), 22–294.





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