Actinobactérias nativas da rizosfera de Aniba parviflora Syn Fragans (macacaporanga) produtoras de substâncias biossurfactantes
Resumo
There is a growing demand for natural sources of products for the most diverse uses, such as
industries and bioremediation methods, since bioproducts have advantages such as less
toxicity and waste generation. Among the bioproducing microorganisms are actinobacteria,
recognized for producing a variety of bioactive molecules, such as antibiotics, antitumorals,
enzymes and biosurfactants. In this study, the ability of strains of actinobacteria isolated from
the rhizosphere of Aniba parviflora Syn Fragans to produce biosurfactant substances was
evaluated, evaluating their emulsifying action on lipid and fossil substrates. The bacterial
strains were isolated and identified through morphological, biochemical and molecular data.
Subsequently, the selection of the strains producing the lipase, esterase and hemolysin
enzymes was carried out, and the strains with the highest enzymatic indexes were selected for
the tests of biosurfactant production in liquid medium. The 11 strains isolated were identified
as belonging to the genus Streptomyces sp., And the values of emulsification index found are
promising when compared to studies with the genus Bacillus. The highest emulsifying action
was recorded for the bacterial culture liquid of Streptomyces sp. MPO2 and Streptomyces sp.
MPO11, indicating that the biosurfactant action is the result of molecules associated with
bacterial biomass.