Characterization of <Emphasis Type="Italic">Trichoderma</Emphasis> species isolated in Ecuador and their antagonistic activities against phytopathogenic fungi from Ecuador and Japan |
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| Authors: | Luis Galarza Yasunori Akagi Kazumi Takao Chang Sun Kim Nitaro Maekawa Akihiro Itai Esther Peralta Efrén Santos Motoichiro Kodama |
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| Institution: | 1.The United Graduate School of Agricultural Sciences,Tottori University,Tottori,Japan;2.Faculty of Agriculture,Tottori University,Tottori,Japan;3.Fungus/Mushroom Resource and Research Center, Faculty of Agriculture,Tottori University,Tottori,Japan;4.Biotechnology Research Center of Ecuador,Higher Polytechnic College of the Littoral CIBE-ESPOL,Guayaquil,Ecuador |
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| Abstract: | Native Trichoderma spp. were isolated from agricultural fields in several regions of Ecuador. These isolates were characterized via morphological observation as well as molecular phylogenetic analysis based on DNA sequences of the rDNA internal transcribed spacer region, elongation factor-1α gene and RNA polymerase subunit II gene. Fifteen native Trichoderma spp. were identified as T. harzianum, T. asperellum, T. virens and T. reesei. Some of these strains showed strong antagonistic activities against several important pathogens in Ecuador, such as Fusarium oxysporum f. sp. cubense (Panama disease) and Mycosphaerella fijiensis (black Sigatoka) on banana, as well as Moniliophthora roreri (frosty pod rot) and Moniliophthora perniciosa (witches’ broom disease) on cacao. The isolates also showed inhibitory effects on in vitro colony growth tests against Japanese isolates of Fusarium oxysporum f. sp. lycopersici, Alternaria alternata and Rosellinia necatrix. The native Trichoderma strains characterized here are potential biocontrol agents against important pathogens of banana and cacao in Ecuador. |
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