Diaporthe pseudoanacardii
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Ordo: Diaporthales
Familia: Diaporthaceae
Genus: Diaporthe
Name
Diaporthe pseudoanacardii L. Schweizer, C. Lamb. & Y. Marín sp. nov. – Wikispecies link – Pensoft Profile
Etymology
Named after its close phylogenetic relation to Diaporthe anacardii.
Description
Conidiomata pycnidial in culture on PNA, globose or irregular, dark brown to black, solitary or in groups, embedded, erumpent, 190–700(–820) μm diam, white to yellow or cream conidial drops and cirrus exuded from ostioles; conidiomatal wall pale olivaceous to olivaceous brown, composed of 1–2 layers, textura angularis. Conidiophores cylindrical to subcylindrical, base subhyaline to pale yellow or pale olivaceous, apex hyaline to subhyaline, straight, densely aggregated, smooth-walled, 1–2(–3) septate, rarely aseptate, (7.5–)10–45 × 1–3.5(–4) μm. Conidiogenous cells phialidic, cylindrical, tapering towards apex, hyaline to subhyaline, terminal or lateral, 7–28 × 1–3.5(–4) μm. Paraphyses not observed. Alpha conidia ovoid to ellipsoidal, hyaline, apex acutely rounded, base acutate, granular to guttulate, aseptate, (5–)6–8(–9) × 1.5–3 μm. Beta and gamma conidia not observed.
Culture characters
Colonies on PDA covering the surface of the Petri dish in 2 weeks, white to grayed yellow (162C–D) or grayed white (156A–B), sometimes with transparent margins and white, yellow green (153B–C) and grayed green (195A–B) zones, granulous to cottony or slightly feathery, flat to raised in some zones, margins filamentous to fimbriate; reverse grayed yellow (161C–D or 162D) and brown (200A) or black (202A–B) center, sometimes with transparent margins. Colonies on MEA reaching 59–85 in 2 weeks, white or grayed yellow (161B–C) with normally a white ring, sometimes with grayed green zones (197A–D) and transparent margins, cottony to slightly feathery, lobate, flat to raised in some zones, margins filamentous to fimbriate; reverse grayed green (197A) to brown (200A) with grayed yellow (161B) margins, or grayed green (197A) with grayed yellow (160D) and yellow green (152B) zones and black (202A) margin, or grayed yellow (161 A–B) and transparent margins. Colonies on OA covering the surface of the Petri dish in 2 weeks, grayed green (195A–D) with white margins and yellow (4A–B) or grayed yellow (160D) center, or grayed white (156A–C) with grayed orange (163B–C) center and yellow white (158B–C) margins, cottony to slightly feathery, raised, margins filamentous to fimbriate; reverse yellow green (147B) with gray brown (199B) margins or entire gray brown (199A–B) or grayed green (195A with 198A centre).
Specimens examined
Cameroon, Kala Mountain, from Trema guineensis, 11 Apr. 2019, E.G.M. Anoumedem (holotype CBS H-24923; culture ex-type CBS 148909 = STMA 18283); Tonga, West Region, from Pittosporum manii, 19 Jun. 2019, E.G.M. Anoumedem (STMA 18247, STMA 18292).
Notes
This species resolved in a well-supported clade (82 bs / 1 pp) together with D. anacardii, D. macadamiae, D. nebulae and D. velutina. Diaporthe pseudoanacardii can be easily distinguished from all the other species by the absence of beta conidia. All these species are reported from Africa (Gomes et al. 2013[1]; Lesuthu et al. 2019[2]; Wrona et al. 2020[3]), except of D. velutina, which was found in Asia (Gao et al. 2017[4]).
Original Description
- Lambert, C; Schweizer, L; Matio Kemkuignou, B; Anoumedem, E; Kouam, S; Marin-Felix, Y; 2023: Four new endophytic species of Diaporthe (Diaporthaceae, Diaporthales) isolated from Cameroon MycoKeys, 99: 319-362. doi
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Other References
- ↑ Gomes R, Glienke C, Videira S, Lombard L, Groenewald J, Crous P (2013) Diaporthe: A genus of endophytic, saprobic and plant pathogenic fungi.Persoonia31(1): 1–41. https://doi.org/10.3767/003158513X666844
- ↑ Lesuthu P, Mostert L, Spies C, Moyo P, Regnier T, Halleen F (2019) Diaporthe nebulae sp. nov. and first report of D. cynaroidis, D. novem, and D. serafiniae on grapevines in South Africa.Plant Disease103(5): 808–817. https://doi.org/10.1094/PDIS-03-18-0433-RE
- ↑ Wrona C, Mohankumar V, Schoeman M, Tan Y, Shivas R, Jeff-Ego O, Akinsanmi A (2020) Phomopsis husk rot of macadamia in Australia and South Africa caused by novel Diaporthe species.Plant Pathology69(5): 911–921. https://doi.org/10.1111/ppa.13170
- ↑ Gao Y, Liu F, Duan W, Crous P, Cai L (2017) Diaporthe is paraphyletic.IMA Fungus8(1): 153–187. https://doi.org/10.5598/imafungus.2017.08.01.11
