Species of the genus Trichoderma are widely distributed across the globe and have high
technological value because they play an important role in biological control of
phytopathogens and promotion of plant growth. In biological control, isolates of this genus
have relevant characteristics that favor them in terms of survival in the environment, such as
high adaptability to ecological conditions, potential to colonize the rhizosphere of plants,
mycoparasitism and production of volatile and non-volatile metabolites. The promotion of
plant growth by this genus occurs due to a variety of factors that may involve the production
of vitamins or the conversion of materials into forms assimilable to plants, the absorption and
transport of minerals. Also, through the production of auxins and metabolites such as 6-
pentyl-α-pyrone (6PP), fungi of the genus Trichoderma favor the development of roots,
making them deeper and more vigorous, providing greater tolerance to drought. Given such
importance, the present work sought to highlight the efficiency of Trichoderma for biological
control in different cultures, located in chapter 1; and to evaluate the potential of Trichoderma
isolates in promoting the growth of açaí seedlings, located in chapter 2, also highlighting the
need for studies focused on the Cerrado of Tocantins, as well as the isolation of native species
in the region.
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