Lactobacillus spp. como forma de controle biológico de fitobactérias do tomateiro (Solanum lycopersicum L.)
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2021-08-27
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Universidade Federal de Goiás
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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.
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TAVARES, R. S. Lactobacillus spp. como forma de controle biológico de fitobactérias do tomateiro (Solanum lycopersicum L.). 2021. 66 f. Dissertação (Mestrado em Biologia da Relação Parasito-Hospedeiro) - Universidade Federal de Goiás, Goiânia, 2021.