Diaporthales » Diaporthaceae

Stenocarpella

Stenocarpella Syd. & P. Syd., Annls mycol. 15(3/4), 258 (1917)

Citation when using this entry, Chen C. et al. in prep. – Fungalpedia, genera of Coelomycetes. Mycosphere

Index Fungorum, Facesoffungi, MycoBank, GenBank

Classification, Diaporthaceae, Diaporthales ,Sordariomycetes, Ascomycota, Fungi

 

Endophytic, saprobic or pathogenic fungi of a range of host plants. The sexual morph is undetermined. The asexual morph is charactrised by subcuticular conidiomata, which is pycnidial, dark brown, separate or occasionally confluent, globose or elongated, subepidermal, unilocular, thick-walled, ostiolate. Ostiole papillate, single, circular. Conidiomata wall composed of thick-walled textura angularis. Conidiophores usually reduced to conidiogenous cells. Conidiogenous cells enteroblastic, phialidic, determinate, cylindrical, discrete, collarette and channel minute, periclinal wall thickened. Conidia pale brown, cylindrical or subcylindrical to narrowly ellipsoid, fusiform, straight or curved, apex obtuse, base tapered and truncate, thick-walled, smooth, eguttulate, 0–3-septate (Sutton 1980; Lamprecht et al. 2011).

 

Type species: Stenocarpella macrospora (Earle) B. Sutton, Mycol. Pap. 141, 202 (1977)

≡ Diplodia macrospora Earle, Bull. Torrey bot. Club 24, 29 (1897)

= Stenocarpella zeae Syd. & P. Syd., Annls mycol. 15(3/4), 258 (1917)

 

Notes: Stenocarpella was introduced by Sydow and Sydow (1917), and S. zeae was treated as the type species. However, Sutton (1977) treated S. macrospora as the new type species because Diplodia macrospora is the oldest name for Stenocarpella zeae. Three species are accepted in this genus, whereas Sutton (1980) introduced S. maydis, and Jia et al. (2023) introduced S. chrysopogonis. Stenocarpella macrospora was treated as Diplodia by Sutton (1964) and S. maydis was treated as Macrodiplodia by Petrak and Sydow (1927), Whereas, these two species were transferred to Stenocarpella by Sutton (1977, 1980). Both Stenocarpella macrospora and S. maydis are pathogens of corn, the causal agent of stalk and ear rot, leaf spot and seeding blight (Latterell 1983; da Silva Siqueira et al. 2014). Stenocarpella chrysopogonis can cause leaf streak disease of Chrysopogon zizanioides (Jia et al., 2023). Crous et al. (2006) revealed Stenocarpella to belong to the Diaporthales based on LSU sequence data. Lamprecht et al. (2011) and Wijayawardene et al. (2016) also agree with Crous et al. (2006) and further confirm the placement in Diaporthaceae based on ITS and LSU sequence data. Currently two species are accepted in Stenocarpella in Species Fungorum (May, 2024) and molecular data are available for all three species in Genbank (May, 2024). Currnent taxonomic treatment of this genus is Diaporthaceae, in Diaporthales (Sordariomycetes) (Wijayawardene et al. 2020).

For all accepted species: search in Species Fungorum Stenocarpella.

 

Stenocarpella maydis (Material examined, Australia, Queensland, Warwick, pathogenic on Zea mays (Cob rot), May 1987, R. Dodman, BRIP 15918). a Label of herbarium material. b, c Conidiomata on culture. d Vertical section of conidiomata. e Conidiomata wall. f–h Different stages of conidiogenesis. i–n Conidia. d, e Scale bars = 150 μm, f Scale bars = 50 μm, f–n Scale bars = 12 μm. (Originally published in Wijayawardene et al. (2016) and republish with authority)

 

References:

 

Crous PW, Slippers B, Wingfield MJ, Rheeder J et al. 2006 – Phylogenetic lineages in the Botryosphaeriaceae. Studies in mycology 55, 235–253.

da Silva Siqueira C, Machado JC, Barrocas EN et al. 2014 – Potential for transmission of Stenocarpella macrospora from inoculated seeds to maize plants grown under controlled conditions. Journal of seed science 36(2), 154–161.

Jia X, Zheng X, Damm U et al. 2023 – Stenocarpella chrysopogonis, a new species causing leaf streak disease of Chrysopogon zizanioides in southern China. Plant Disease 4.

Lamprecht SC, Crous PW, Groenewald JZ et al. (2011) Diaporthaceae associated with root and crown rot of maize. IMA Fungus 2(1), 13–24.

Latterell FM. 1983 – Stenocarpella macrospora (= Diplodia macrospora) and S. maydis (= D. maydis) compared as pathogens of Corn. Plant Disease 67, 725–729.

Petrak F, Sydow H. 1927 – Die Gattungen der Pyrenomyzeten, Sphaeropsideen und Melanconieen. Teil 1. Die phaeosporen Sphaeropsideen und die Gattung Macrophoma. Feddes Repertorium Specierum Novarum Regni Vegetabilis. Beiheft. Berlin 42, 1–551.

Sutton BC. 1964 – Coelomycetes III. Annellolacinia gen. nov., Aristastoma, Phaeocytostroma, Seimatosporium etc. Mycological Papers 97, 1–42.

Sutton BC. 1977 – Coelomycetes VI. Nomenclature of generic names proposed for Coelomycetes. Mycological Papers 141, 1–253.

Sutton BC. 1980 – The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata.Commonwealth Mycological Institute, Kew.

Sydow H, Sydow P. 1917 – Beitrag zur Kenntniss der Pilzflora der Philippinen-Inseln. Annales Mycologici 15(3–4), 165–268.

Wijayawardene, NN, Hyde, KD, Wanasinghe, DN, Papizadeh, M et al. 2016 – Taxonomy and phylogeny of dematiaceous coelomycetes. Fungal diversity 77, 1–316.

Wijayawardene, NN, Hyde, KD, Al-Ani, LKT, Tedersoo, L et al. 2020 – Outline of Fungi and fungus-like taxa. Mycosphere Online: Journal of Fungal Biology 11(1), 1060–1456.

 

Entry by Chao Chen^1,2,3

Edited by Kevin D. Hyde^1,3 & Ishara S. Manawasinghe¹

 

¹Innovative Institute for Plant Health, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Zhongkai University of Agriculture and Engineering, Guangzhou, People’s Republic of China.

²Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.

³Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, Thailand.

 

Published online 2024-May 30.

 

 

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