Aureobasidium pullulans
Aureobasidium pullulans (de Bary & Löwenthal) G. Arnaud, Annals d'École National d'Agric. de Montpellier, Série 2 16(1-4): 39 (1918) [1917]
Index Fungorum number: IF 101771; Facesofungi number: FoF 00099
Saprotrophic on dead and aerial branches of Vitis vinifera. Sexual morph: not observed. Asexual morph: Conidiomata acervular to sporodochial, amphigenous, substomatal, subepidermal, pulvinate, dry or crystalline in appearance, pale brown, discrete. Conidiogenous cells undifferentiated, intercalary or terminal on hyaline hyphae or arising as short lateral branches. Conidia 8–16 × 4–7 μm (x̄ = 10 × 5 µm, n = 40), blastic, hyaline, smooth-walled, aseptate, straight, ellipsoidal to sphaerical, reniform to sickle-shaped, sometimes cylindrical with obtuse ends and occasionally with a slightly truncate base, rather variable in shape and size.
Culture characteristics: Colonies on PDA attaining 30mm diam. at 25° C after 7 d appearing smooth and slimy due to abundant sporulation. No aerial mycelium. Pink to yellowculture, yellow to light yellow in reverse view. After 14days black sectors composed of dark pigmented hyphae.
Material examined: ITALY, Province of Forlì-Cesena, Teodorano - Meldola, on dead and aerial branch of Vitis vinifera (Vitaceae), 15 February 2015, Erio Camporesi IT 2378 (MFLU 15-1084); culture, MFLUCC 17-1218; ITALY, Province of Forlì-Cesena, Teodorano - Meldola, on dead and aerial branch of Vitis vinifera (Vitaceae), 16 February 2015, Erio Camporesi IT 2382 (MFLU 15-1086); living culture, MFLUCC 17-1221, MFLUCC 17-1222; ITALY, Province of Forlì-Cesena, near Meldola, on dead and aerial branch of Vitis vinifera (Vitaceae), 2 February 2016, Erio Camporesi IT 2800 (MFLU 16- 0652) culture, MFLUCC 17-1256; ITALY, Province of Forlì-Cesena, Tessello - Cesena, on dead and aerial branch of Vitis vinifera (Vitaceae), 5 March 2015, Erio Camporesi IT 2404 (MFLU 15-3513), culture, MFLUCC 17-1231; ITALY, Province of Forlì-Cesena, Farazzano - Forlì, on dead and aerial branch of Vitis vinifera (Vitaceae), 10 November 2016, Erio Camporesi IT 3146 (MFLU 16-2813).
Notes: Isolates found in this study are morphologically similar to the type species of A. pullulans and phylogenetic analysis of combined LSU, SSU and ITS gene regions clustered them with A. pullulans (Jayawardena et al. 2018). Aureobasidium pullulans has been recorded as an endophyte on Vitis sp. (Mulenko et al. 2008, Gonzalez & Tello 2011, Sanoamuang et al. 2013, Fischer et al. 2016). This study provides the first record of this species as a saprotroph on V. vinifera in Italy.
Figure x. Aureobasidium pullulans. a. Fruiting bodies on host tissue. b. Conidiophore and conidiogenesis. c-d. Conidia. e. Surface view of colony after 7 weeks. f. Reverse view of colony after 7 weeks. Scale bars: b–d=10 μm.
References:
Jayawardena RS, Hyde KD, Chethana KW, Daranagama DA et al. 2018 – Saprotrophic fungi on Vitis in China, Italy, Russia and Thailand. Mycosphere notes 9, 1–114.
Mulenko W, Majewski T, Ruszkiewicz-Michalska M. 2008 – A Preliminary Checklist of Micromycetes in Poland. W. Szafer Institute of Botany, Polish Academy of Sciences 9, 752.
Gonzalez V, Tello ML. 2011 – The endophytic mycota associated with Vitis vinifera in central Spain. Fungal Diversity 47, 29–42.
Sanoamuang N, Jitjak W, Rodtong S, Whalley AJS. 2013 – Gelatinomyces siamensis gen. sp. nov. (Ascomycota, Leotiomycetes, incertae sedis) on bamboo in Thailand. IMA Fungus 4, 71– 87.
Fischer M, Schneider P, Kraus C, Molnar M et al. 2016 – Grapevine trunk disease in German viticulture: occurence of lesser known fungi and first report of Phaeoacremonium viticola and P. fraxinopennsylvanicum. Vitis 55, 145–156.
Last Update : 16 September 2021