Trichoderma evansii and T. lieckfeldtiae: two new T. hamatum-like species

The new species, Trichoderma evansii and T. lieckfeldtiae, resemble the closely related T. hamatum and T. pubescens in forming discrete, setose conidial pustules within which arise smooth, green conidia from pachybasium-like conidiophores. The phylogenetic position of these species was determined wi...

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Bibliographic Details
Published in:Mycologia 2009, Vol.101 (1), p.142-156
Main Authors: Samuels, Gary J., Ismaiel, Adnan
Format: Article
Language:English
Subjects:
ascomycetes
Biological taxonomies
Branches
Cacao
Conidia
Conidiophores
Ecosystem
endophytes
endophytic fungi
Endosymbionts
fungal anatomy
Genes, Fungal - genetics
Hair
Hypocrea
Hypocreaceae
Hypocreales
internal transcribed spacers
Malvaceae
Molecular Sequence Data
molecular systematics
Moniliophthora roreri
Ochnaceae
Phylogenetics
Phylogeny
sequence analysis
soil fungi
Species Specificity
Systematics
Theobroma
Theobroma cacao
Theobroma gileri
Trichoderma
Trichoderma - classification
Trichoderma - cytology
Trichoderma - isolation & purification
Trichoderma evansii
Trichoderma hamatum
Trichoderma lieckfeldtiae
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Summary:The new species, Trichoderma evansii and T. lieckfeldtiae, resemble the closely related T. hamatum and T. pubescens in forming discrete, setose conidial pustules within which arise smooth, green conidia from pachybasium-like conidiophores. The phylogenetic position of these species was determined with combined partial sequences of ITS, translation-elongation factor 1-alpha, RNA polymerase II subunit and actin genes. All are members of the Viride clade. Trichoderma evansii forms a sister group relationship with a clade that includes T. hamatum and T. pubescens. It differs from the latter two species in having subglobose conidia; it was isolated as an endophyte from sapwood of Lophira alata (Ochnaceae) and Cola verticillata (Malvaceae) in Cameroon and Theobroma gileri (Malvaceae) in Peru. Trichoderma lieckfeldtiae occupies an unresolved position in the Viride clade despite being virtually morphologically indistinguishable from T. hamatum; it was isolated from fruit of cacao infected with Moniliophthora roreri in Colombia, pseudostroma of Moniliophthora roreri on pods of Theobroma cacao in Peru and from soil in a cacao farm in Cameroon (central Africa).
ISSN:0027-5514
1557-2536
DOI:10.3852/08-161