Botryosphaeriales » Phyllostictaceae » Phyllosticta

Phyllosticta pervincae

Phyllosticta pervincae Bissett & Darbysh., Fungi Canadenses, Ottawa: no. 282 (1984)

Facesoffungi number: FoF 07507

 

Saprobic or parasitic on the host plant. Sexual morph: undetermined. Asexual morph: Conidiomata 100150 diam., 100120 µm high, dark brown to black, pycnidial, solitary to gregarious, immersed to semi-immersed, subglobose, unilocular, glabrous, ostiolate. Ostiole circular, centrical. Conidiomatal wall 1540 µm wide, composed of thick-walled, dark brown cells of textura angularis in the outer layers, becoming thin-walled, hyaline cells towards conidial hymenium. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 4–6.5 × 24 µm, hyaline, enteroblastic, annellidic, flask-shaped or cylindrical, smooth-walled, percurrently proliferating, formed from the inner wall layers of conidiomata. Conidia 10–13 × 610 µm ( = 11.5 × 7 µm; n = 30), hyaline, elliptical to ovoid, rounded at each end, aseptate, smooth-walled, with a mucoid sheath up to 24 µm thick, and an mucoid, apical appendage (7–15 µm long). Spermatia not observed.

 

Material examined: Italy, Province of Forlì-Cesena, Modigliana, Montebello, on dead aerial branches of Cornus sanguinea (Cornaceae), 23 September 2012, Erio Camporesi, IT748 (MFLU 19-2879).

 

Notes: Phyllosticta pervincae was originally reported from branches of Vinca difformis (Apocynaceae) in Portugal. This species is also associated with brown, diffuse leaf spots on Vinca minor in the USA (Nag raj 1993). Our collection shares similar form of conidiomata, conidiogenous cells and conidia with P. pervincae. In addition, it has similar conidial dimensions with P. pervincae [(6.5)915 × (4.5)67.5(9),  = 12 × 6.7 µm] and is, therefore, considered conspecific with P. pervincae.

 

Phyllosticta pervincae (MFLU 19-2879) a Herbarium specimen. b, c Appearance of dark brown to black conidiomata on the host. d Vertical section of conidioma. e Ostiole. f, g Sections of peridium. h–j, m Conidiogenous cells and developing conidia. k–l, n–p Conidia. Scale bars b–c = 250 µm, d = 50 µm, e–g = 20 µm, h–j, m = 5 µm, k–l, n–p = 10 µm.

 

 

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

 

 

 

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