A comparative study of Neogymnomyces virgineus,a new keratinolytic species from dung,and its relationships with the Onygenales  

作　　者：Francesco Doveri Susanna Pecchia Mariarosaria Vergara Sabrina Sarrocco Giovanni Vannacci 

机构地区：[1]Department of Tree Science,Entomology and Plant Pathology“G.Scaramuzzi”,Section Plant Pathology,University of Pisa,via del Borghetto 80,56124 Pisa,Italy

出　　处：《Fungal Diversity》2012年第1期13-34,共22页真菌多样性（英文）

摘　　要：Isolations of onygenalean fungi were made recently from different dung samples from Italy.A striking snowwhite species with gymnothecial ascomata,developed in damp chamber on dormouse dung collected in a cave,was subjected to keratinolytic tests and morphological,cultural,and phylogenetic studies.The keratinolytic ability of this species,associated with a Chrysosporium anamorph and a sexual state of appendiculate reticuloperidia and oblate ascospores,allows it to be accomodated in Onygenaceae.White ascomata,blunt or subcapitate peridial appendages,pitted ascospores,and tuberculate conidia suggest it to be a new Neogymnomyces,and this was confirmed by parsimony analyses of LSU and ITS nrDNA sequences.Following recent phylogenetic analyses,the morphological and physiological features of order Onygenales and its families are re-examined and discussed.After the introduction of a new species,Neogymnomyces is reviewed and compared with all other genera in Onygenaceae.The Chrysosporium imperfect state of Neogymnomyces virgineus is described and compared to the anamorph of N.demonbreunii.It is also compared to the atypical Chrysosporium merdarium and to several other Chrysosporium species with echinulate to verrucose-tuberculate conidia,isolated from guano,dung,and nitrogen-rich soils in caves.The onygenalean fungi isolated from any kind of dung are discussed and their facultative coprophily ascribed to variable faecal contents of keratin or other degradable substances.A key to the families and genera of the Onygenales is provided.

关 键 词：CHRYSOSPORIUM Coprophily Key Keratinolysis/keratinophily New Neogymnomyces Onygenalean fungi PHYLOGENY 

分 类 号：Q94[生物学—植物学]