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Polyphasic taxonomy of Penicillium subgenus Penicillium A ... - CBS

Polyphasic taxonomy of Penicillium subgenus Penicillium A ... - CBS

Polyphasic taxonomy of Penicillium subgenus Penicillium A ... - CBS

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J.C. FRISVAD &R.A.SAMSON= P. aurantio-albidum Biourge, Cellule 33: 197, 1923.= P. johanniolii K.M. Zalessky, Bull. Int. Acad. Pol.Sci. Lett., Sér. B 1927: 453,1927.= P. cyclopium var. aurantiovirens (Biourge) Fassatiová,Acta Univ. Carol. Biol. 12:326, 1977.= P. cordubense Ramírez & Martínez, Mycopathologia74: 164, 1981= P. viridicyclopium Abe, J. gen. Appl. Microbiol. 2:107, 1956.Neotype: IMI 089372P. freii Frisvad & Samson, sp. nov.A Penicillio aurantiogriseo coloniis crustosis et inertia30ºC crescendi distinguitur; xanthomegninum,viomelleinum, vioxanthinum, cyclopeptinum,dehydrocyclopeptinum, cyclopeninum, cyclopenolum,viridicatolum, 3-methoxyviridicatinum formantur, nequeauranthinum, anacinum, acidum terrestricum.Typus: IMI 285513P. melanoconidium (Frisvad) Frisvad & Samson,comb. nov.Basionym: P. aurantiogriseum var. melanoconidiumFrisvad, Mycologia 81:849, 1989.Holotype: IMI 321503P. neoechinulatum (Frisvad, Filt. & Wicklow)Frisvad & Samson, comb. nov.Basionym: P. aurantiogriseum var. neoechinulatumFrisvad, Filt. & Wicklow, Can. J. Bot. 65: 767, 1987.Holotype: IMI 296937P. polonicum K. Zaleski, Bull. Int. Acad. Pol. Sci.Lett., Sér. B 1927: 445, 1927.= P. aurantiogriseum var. polonicum (K.M. Zalessky)Frisvad, Mycologia 81: 850.= P. carneolutescens G. Smith, Trans. Br. Mycol. Soc.22: 252, 1939.Neotype: <strong>CBS</strong> 222.28P. tricolor Frisvad, Seifert, Samson & Mills, Can. J.Bot. 72: 937, 1997 (check).Holotype: DAOM 216240P. viridicatum Westling, Ark. Bot. 11: 88, 1911.= P. olivinoviride Biourge, Cellule 33: 132, 1923.= P. blakesleei K.M. Zalessky, Bull. Int. Acad. Pol.Sci. Lett., Sér. B, 1927: 441, 1927.= P. stephaniae K.M. Zalessky, Bull. Int. Acad. Pol.Sci. Lett., Sér. B, 1927: 451, 1927.= P. ochraceum Bain. apud Thom, Penicillia: 309,1930.= P. verrucosum var. ochraceum (Bain.) Samson, Stolk& Hadlok, Stud. Mycol. (Baarn) 11: 42, 1976.= P. olivicolor Pitt, Gen. Penicil.: 368, 1979.= P. aurantiogriseum var. viridicatum (Westling) Frisvad& Filt., Mycologia 81: 850, 1989.Neotype: IMI 039758iiAll species included in the series Viridicata producesimilar two-, occasionally three- stage-branched(terverticillate) conidiophores, as well as robustphialides. The conidia <strong>of</strong> most species range fromellipsoidal or subglobose to globose, with wallssmooth or nearly so (with the exception <strong>of</strong> thestrongly roughened conidia <strong>of</strong> P. neoechinulatum).Species <strong>of</strong> the Viridicata are very importantspoilage and mycotoxin producing fungi in cereals,and consequently a correct identification is veryimportant. Unfortunately, the identification <strong>of</strong> thesespecies is <strong>of</strong>ten problematic, because <strong>of</strong> the greatmorphological variation within the species and thepresence <strong>of</strong> morphologically intergrading strains.Raper & Thom (1949) considerably reduced thenumber <strong>of</strong> species by regarding many <strong>of</strong> them assynonymns. However, they still maintained a greatnumber <strong>of</strong> closely related species, which they distinguishedby minor differences, such as colony textureand colour. In an attempt to simplify species determinationin this series, Samson et al. (1976) proposed toemend the description <strong>of</strong> P. verrucosum, thus creatinga large, variable species, which they divided into sixvarieties, mainly based on conidial colour. Pitt (1979)used colony diameter at different temperatures andwater conditions together with conidial and colonypigmentation as means to separate the species <strong>of</strong><strong>Penicillium</strong>. Frisvad (1981, 1983, 1985) introducedthe application <strong>of</strong> physiological criteria, such as theproduction <strong>of</strong> extrolites (for details see above) in anattempt to come to a more accurate delimitation <strong>of</strong>species. In the present paper the species are based onboth morphological and physiological characters(especially on pr<strong>of</strong>iles <strong>of</strong> extrolites). Since the morphologicaldifferences between most species <strong>of</strong> theViridicata are very slight, the taxonomical importance<strong>of</strong> the extrolites is emphasized. Species <strong>of</strong> theseries Viridicata show close affinities with the seriesCorymbifera, since the structure <strong>of</strong> the conidiophoresis identical. Both series are distinguished by morphologicalcriteria. In the Viridicata the conidiophoresrange from strictly mononematous to very slightlysynnematous, whereas in the Corymbifera manyconidiophores are aggregated into well-definedsynnemata, usually appearing as conspicuous orloosely branched coremia. The Viridicata are mainlyseparated from the Expansa by their globose tosubglobose conidia and by their weak growth oncreatine as sole N-source.This series has been discussed by Frisvad andLund (1993) and Lund and Frisvad (1994). It ischaracterized by the seed and cereal habitats (goodamylase production) and production <strong>of</strong> several extrolites.It is clearly a polythetic series concerningextrolites, as no metabolites are common to all ninespecies (Svendsen and Frisvad, 1994; Larsen andFrisvad, 1995; Smedsgaard and Frisvad, 1997).The ex type culture <strong>of</strong> P. aurantiogriseum var.poznaniense (NRRL 972) is a typical P. aurantiogriseumand not a P. crustosum as claimed by Pitt(1979).28

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