Prosthemium betulinum
Prosthemium betulinum Kunze, Mykologische Hefte (Leipzig) 1: 18 (1817).
Index Fungorum number: IF 223054; Facesoffungi number: FoF 06080, Fig. 1
Description: see Tanaka et al. (2010); Ariyawansa et al. (2016); Yuan et al. (2020).
Material examined: see Tanaka et al. (2010); Ariyawansa et al. (2016); Yuan et al. (2020).
Figure. 1. Prosthemium betulinum (MFLU 17-0975). a Appearance of ascomata on host surface. b Section through ascomata. c Peridium. d Pseudoparaphyses. e, f Asci with ascospores. g–i Ascospores (i: stained in Indian ink to show sheath). j Pycnidia on culture. k, l Macroconidia. m–q Microconidia. Scale bars: a = 1000 μm, b = 500 μm, c, e, f = 50 μm, d = 10 μm, g–j = 20 μm, m–q = 5 μm.
Importance and role
Importance of genus to ecosystem
Species of Prosthemium are saprobic and helps in decomposition of organic matter in the ecosystem. Some taxa might be fungal pathogens.
Industrial relevance and applications
The industrial use of Prosthemium has not been investigated.
Quarantine significance
No disease has been reported from Prosthemium. This warrants further research.
Biochemical importance of the genus, chemical diversity or applications
The chemical diversity of Prosthemium has not been investigated.
Diversity of the genus
Prosthemium comprises eight species known on Betula pendula (Betulaceae), Pterocarya rhoifolia (Juglandaceae), Salix caprea (Salicaceae), Alnus sp. (Betulaceae). Prosthemium has wide geographical distribution such as Canada, England, France, Italy, Japan, Netherlands, Poland, Russia, Scotland, Sweden, Switzerland, United States amongst others. Prosthemium may comprise many more species that can be discovered in the future.
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