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Identification of Trichoderma strains from building materials by ITS1 ribotyping, UP-PCR fingerprinting and UP-PCR
M Lübeck1, S K Poulsen, P S Lübeck
1Department of Plant Biology, Plant Pathology Section, Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark. mette.lubeck@plbio.kvl.dk
Abstract:
To study the role of Trichoderma in sick building syndrome, it is essential to be able to accurately identify species. Forty-four strains of Trichoderma spp. isolated from Danish buildings damaged by water leaks were identified using ITS1 ribotyping and universally primed PCR, UP-PCR. Ribotyping allowed the assignment of the strains into three distinct groups. High similarity of UP-PCR banding profiles of the strains allowed species designation for almost all strains (43 out of 44) when compared with the UP-PCR banding profiles obtained from reference strains of T. atroviride, T. citrinoviride, T. harzianum, T. longibrachiatum and T. viride. However, cross hybridization of UP-PCR products showed that the latter strain had high DNA homology to the ex-type strain of T. hamatum. The combined approach is a convenient way for reliable identification of Trichoderma strains.