Lactobacillus spp. como forma de controle biológico de fitobactérias do tomateiro (Solanum lycopersicum L.)

• Ano de defesa: 2021
• Autor(a) principal: Tavares, Rodolfo Sodré
• Orientador(a): Vieira, José Daniel Gonçalves
• Banca de defesa: Vieira, José Daniel Gonçalves, Carneiro, Lilian Carla, Nascimento, Abadia dos Reis
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Biologia da Relação Parasito-Hospedeiro (IPTSP)
• Departamento: Instituto de Patologia Tropical e Saúde Pública - IPTSP (RG)
• País: Brasil
• Palavras-chave em Português: Controle biológico; Fitobactérias; Pesticidas; Antibióticos; Ecotoxicidade
• Palavras-chave em Inglês: Biological control; Phytobacteria; Pesticides; Antibiotics; Ecotoxicity
• Área do conhecimento CNPq: CIENCIAS BIOLOGICAS::BIOLOGIA GERAL
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/11679

Current processes for the control of tomato diseases (Solanum lycopersicum L.) mostly include the application of chemical pesticides and the use of antibiotics in an attempt to alleviate various diseases. Among the phytobacteria, Xanthomonas spp. pathovars, Pectobacterium cavotovorum, Clavibacter michiganensis subsp. michiganensis, Pseudomonas corrugata and Ralstonia solanacearum are reported all over the world, leading to the appearance of diseases such as bacterial spot, soft rot and seed contamination, leading to great economic losses. The application of lactic acid bacteria (LAB) as a form of biological control appears as a promising alternative to the main control measures adopted for diseases caused by phytobacteria, both for its effectiveness and for its viability, as is the example of countries such as Indonesia, Guatemala and Holland, who incorporated the use of biological control with good results in production. This study uses Lactobacillus spp. species as a form of biological control against tomato phytobacteria species. The collection of material from the School of Agronomy (EA) of the Federal University of Goiás (UFG) was carried out from healthy tomato plants without disease symptoms in an attempt to obtain biologically active BAL strains against selected phytobacteria. Samples of tomato leaves with symptoms of bacterial spot were also collected in the EA of the UFG; then, the selection of BAL strains from starter culture obtained from the local market was also carried out. The results of this study indicate promising broad-spectrum antimicrobial activity where strains of Lactobacillus johnsonii, L. delbrueckii, L. plantarum, L. Breve and L. sporogenes demonstrated “in vitro” antimicrobial activity against different phytobacteria. The data presented in this study reveal the promising potential of BAL strains as a form of biological control as a viable alternative to chemical pesticides and antibiotics, helping to mitigate the impact on human, animal and environmental health.