Antagonistic activity and hyphal interactions of Trichoderma spp. against Fusarium proliferatum and F. oxysporum in vitro

Trichoderma is a well-known antagonist against soilborne plant pathogens. However, the species and even various isolates have different biocontrol potential. To evaluate the antagonistic activities of Trichoderma harzianum , T. harzianum strain T100 (T100), T. viride and T. haematum against Fusarium...

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Published in:Archiv für Phytopathologie und Pflanzenschutz 2014-10, Vol.47 (16), p.1979-1987
Main Authors: Ghanbarzadeh, Bahareh, Safaie, Naser, Goltapeh, Ebrahim Mohammadi
Format: Article
Language:English
Subjects:
antagonists
biocontrol
biological control
fungi
Fusarium
Fusarium oxysporum
Fusarium proliferatum
Genotype & phenotype
hyphae
in vitro
Metabolites
mycelium
mycoparasites
plant pathogens
Trichoderma
Trichoderma harzianum
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Summary:Trichoderma is a well-known antagonist against soilborne plant pathogens. However, the species and even various isolates have different biocontrol potential. To evaluate the antagonistic activities of Trichoderma harzianum , T. harzianum strain T100 (T100), T. viride and T. haematum against Fusarium oxysporum and F. proliferatum , we used dual culture and productions of volatile and non-volatile metabolites in three different phases in vitro . An analysis of the data in dual culture tests represented T. viride , T. haematum and T100 as effective antagonists of Fusarium while T100 was the only fungus being able to lyse the confronting mycelia. Similar results were obtained in the volatile metabolites tests also. In contrast with the two previous tests, the non-volatile metabolites produced by T. harzianum inhibited Fusarium mycelial growth the most, and T100 acted moderately. It was also clearly showed that the antagonistic effect of Trichoderma spp. was more on F. proliferatum than on F. oxysporum . Finally, because Trichoderma spp. was most effective in the second phase, we recommend to use T100 against F. proliferatum at the initial stages of infection as its mycoparasitism on F. oxysporum was observed microscopically through forming apressoria structures without any coiling around the pathogen.
ISSN:1477-2906
0323-5408
1477-2906
DOI:10.1080/03235408.2013.864506