Author : Priscila Chaverri
Publisher :
Page : 119 pages
File Size : 21,66 MB
Release : 2004
Category : Ascomycetes
ISBN :
Book Description
The systematics of species of Hypocrea with green ascospores and their Trichoderma anamorphs is presented. Multiple phenotypic characters were analysed, includingteleomorph and anamorph, as well as col-ony morphology and growth rates at varioustemperatures. In addition, phylogenetic analyses of two genes, the RNA polymerase II subunit (RPB2) and translation elongation factor 1-alpha (EF-1a), were performed. These analyses revealedthat species of Hypocrea with green ascosporesand Trichodermaanamorphs are derived from within Hypocrea but do not form a monophyletic group. Therefore, Creopus and Chromocrea, genera formerly segregated from Hypocrea only based on their coloured ascospores, are considered synonyms of Hy-pocrea. The present study showed that phenotypic characters alone are generally not helpful in understanding phylogenetic relationships in this group of organisms, because teleomorph characters are generally highly con-served and anamorph characters tend to be morphologically divergent within monophyletic lineages or clades. The species concept used here for Hypocrea/Trichoderma is based on a combination of phenotypic and geno-typic characteristics. In this study 40 species of Hypocrea/Trichoderma having green ascospores are described and illustrated. Dichotomous keys to the species are given. The following species are treated (names in bold are new species or new combinations): H. albocornea, H. atrogelatinosa, H. aureoviridis/T. aureoviride, H. can-dida/T. candidum, H. catoptron/T. catoptron, H. centristerilis, H. ceracea/T. ceraceum, H. ceramica/T. ce-ramicum, H. chlorospora/T. chlorosporum, H. chromosperma/T. chromospermum, H. cinnamomea/T. cin-namomeum, H. clusiae, H. cornea, H. costaricensis, H. crassa/T. crassum, H. cremea/T. cremeum, H. cu-neispora/T. cuneisporum, H. estonica/T. estonicum, H. gelatinosa/T. gelatinosum, H. gyrosa, H. lixii/T. har-zianum, H. macrospora, H. melanomagna/T. melanomagnum