Nitschke, Pyrenomycetes Germanici 2: 245 (1870)


Sordariomycetes, Subclass Sordariomycetidae






Diaporthe Nitschke, Pyrenomyc. Germ. 2: 240 (1870)

Type species: Diaporthe eres Nitschke, Pyrenomycetes Germanici 2: 245 (1870)

Sexual morph: saprobic, Stromata on host surface as numerous minute pustules or angular ruptures. Stromata cortical, subvalsoid, separate (Chorostate) or effused, cylindrical or filiform exserted beak; ostioles are erumpent singly or in small groups. Ascomata 240-800 x 160-500 µm, spherical or flattened, scattered singly, irregularly crowded or loosely grouped, not definitely orientated beneath the ectostromata but often erumpent through it, buried in either the wood or bark.  Asci aparaphysate, fusoid, 8-spored, 40-60 x 5-8 µm, clavate, with a refractive apical ring. Ascospores 9.5-14(-15) x 2.5-4 µm fusoid or subelliptical, uniseptate, 2-4 nucleate, hyaline, with or without appendages, constricted at the septum. Asexual Morph: Conidiophore morphology 7-17.5 μm in length and 1-2 μm in width, simple, cylindrical to obclavate and phialidic. Alpha-conidia 6-9 x 2-3 µm; beta-conidia 15-18 x 1 µm.



Type & Location:
Other Specimens:
on dead branches. Diaporthe and their Phomopsis asexual states have broad host ranges and are widely distributed, occurring as plant pathogens, endophytes or saprobes, but also as pathogens of humans and other mammals (Webber & Gibbs 1984, Carroll 1986, Boddy & Griffith 1989, Rehner & Uecker 1994, Garcia-Reyne et al. 2011, Udayanga et al. 2011).
England, Ireland, Italy, Scotland, China, Cuba, Germany, South Africa, UK, and the USA.
Pertinent Literature:
NOTES: The vegetative mycelium of Diaporthe develop within the bark, but in some species it occurs within the wood also. Nitschke (1870), stablished the genus Diaporthe typified by Diaporthe eres and this species has been studied in detail by Udayanga et al. (2015). Species of this genus are plant pathogens, endophytes or saprobes, commonly isolated from a wide range of hosts (Gomes et al. 2013, Udayanga et al. 2014, Hyde et al. 2014). Phomopsis species are the asexual morphs of Diaporthe and are now considered a synonym. The phylogeny and taxonomy of the genus has been addressed in several recent studies (Udayanga et al. 2014, 2015, Liu et al. 2015, Gomes et al. 2013, Lombard et al. 2014, Dissanayake et al. 2015). According to The International Code of Botanical Nomenclature (ICBN), the sexual morph. Diaporthe is accepted as the primary name (Maharachchikumbura et al. 2015, Rossman et al. 2015) on the basis that Diaporthe was established 14 years before Phomopsis,and therefore has president.


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