peptaibols, diketopiperazines, sesquiterpenes, and steroids are fungal metabolites
with antibiotic properties frequently associated with their biocontrol activity [79,
90]. For example, addition of 0.3 mg/ml of 6-PP to agar medium caused a 69.6%
growth reduction in R. solani and a 31.7% reduction in Fusarium oxysporum f. sp.
Fig. 6 Chemical structures of Trichoderma siderophores. These compounds have key roles in
interactions with plants and iron deprivation to other rhizospheric microorganisms. Notice the
position of the oxygen in the fusarin C that easily can chelate iron in the center of the molecule
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H. A. Contreras-Cornejo et al.
with antibiotic properties frequently associated with their biocontrol activity [79,
90]. For example, addition of 0.3 mg/ml of 6-PP to agar medium caused a 69.6%
growth reduction in R. solani and a 31.7% reduction in Fusarium oxysporum f. sp.
Fig. 6 Chemical structures of Trichoderma siderophores. These compounds have key roles in
interactions with plants and iron deprivation to other rhizospheric microorganisms. Notice the
position of the oxygen in the fusarin C that easily can chelate iron in the center of the molecule
276
H. A. Contreras-Cornejo et al.