Avaliação da atividade antibacteriana de extratos de fungos da Antártica contra Xanthomonas

• Autor(a) principal: Nardo, Victor Gustavo [UNESP]
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203767; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2020-02-27/000927004.pdf
• topic: Microbiologia; Fungos; Xanthomonas; Bactérias; Metabólitos; Antibacterianos; Bacteriologia agrícola; Antártida; Brasil

Bacteria of the genus Xanthomonas affect the cultures of great economic importance in Brazil, and the control of these diseases by the use of chemical products, among others practices cause negative impacts on health and the environment, which makes the search for sustainable alternatives of combating these diseases increasingly important. A possible alternative to the chemicals that have aroused great interest is the appiclation of secondary metabolites. It is believed that fungi living in extreme environments such as Antarctica can produce secondary metabolites as yet unknown. This Project aims to investigate the potential activity of secondary metabolites produced by fungi isolated from the soil and marine sediments from the retreat of the Collins glacier in Antarctica against three economically important species of Xanthomonas for the country's agriculture. For this purpose, 17 fungi collected in soil and marine sediments were used in two expeditions in Antarctica (2013 and 2015), which are preserved at the Microbial Resources Center of UNESP. After the production of the crude extracts by the fungi, they were submitted to antibacterial bioassays in order to evaluate the antibacterial activity of these extracts against Xanthomonas axonopodis pv passiflorae; Xanthomonas citri subsp. citri; Xanthomonas euvesicatoria pathogenic effects of passion fruit, citrus fruits and tomato, respectively. Three extracts presented potential antibacterial activity against the three Xanthomonas, and one extract presented promising results only against X. euvesicatoria