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- Title
Ação antimicrobiana de actinomicetos rizosféricos de guaranazeiro.
- Authors
de Oliveira Martins, Suzana da Silva; Vargas de Mendonça, José Luiz; Pinheiro do Nascimento, Aryana; Costa Neto, Pedro de Queiroz; Miná Barbosa, Andrezza
- Abstract
Popularly known as guarana, Paullinia cupana Kunth var. sorbilis (Mart.) Ducke, from the Paullinieae tribe, Sapindaceae family, is a native Brazilian species of considerable economic importance in the pharmaceutical and food industry. Actinomycetes are qualitatively and quantitatively important in the rhizosphere, being able to influence plant growth and protect the roots from the invasion of pathogenic fungi, thus being able to be used in the biological control of diseases in plantations. This work aimed to evaluate the antibacterial action of rhizospheric actinomycetes from guaranazeiro from plantations located in the municipality of Maués/AM, in order to find new antimicrobial agents against pathogenic bacteria in humans. 17 actinomycetes isolated from the guaranazeiro rhizosphere were investigated and evaluated for their antimicrobial activity against four pathogenic bacteria of clinical interest. Staphylococcus aureus, Streptococcus pneumococcus, Enterococcus faecalis and Bacilus subtilis. The evaluation of antagonistic activity by the isolates was performed using the cross streak and thermostability method. The results revealed that the ACT 4 isolate enabled the inhibition of only two pathogens, Staphylococcus aureus and Bacillus subtilis, while the ACT 93 isolate exhibited a broad spectrum of activity against all the gram-positive pathogenic bacteria evaluated. As for thermostability and production of metabolites by the isolates, only the ACT 4 isolate was able to inhibit an Enterococcus faecalis bacterium. This study shows that actinomycete isolates have the potential to act as potential sources of new antibacterial compounds against human pathogenic microorganisms. However, more in-depth testing is needed so that an important entry into the pharmaceutical industry can take place in the future.
- Subjects
GUARANA; SAPINDACEAE; ACTINOBACTERIA; PATHOGENIC bacteria; PLANTATION life
- Publication
Nature & Conservation, 2020, Vol 14, Issue 1, p83
- ISSN
2318-2881
- Publication type
Article
- DOI
10.6008/CBPC2318-2881.2021.001.0009