Identification of Trichoderma spp. isolates. Molecular identification
of Trichoderma isolates was based on the DNA sequencing
of two unlinked loci, the ribosomal internal transcribed spacer (ITS)
region and/or the tef1 gene. Fungal DNA was extracted using the
DNeasy plant mini kit (Qiagen) according to the manufacturer’s
protocol. Amplification of nuclear rDNA, containing the ITS1 and -2
and the 5.8S rRNA gene was done using primers ITS1 and ITS4
(White et al., 1990), according to Doveri et al. (2010).