O gênero Bacillus aplicado ao controle biológico de doenças de plantas

Melo, Thiago Anchieta de; Nascimento, Ingrid Tayane Vieira da Silva do; Serra, Ilka Márcia Ribeiro de Souza

doi:10.33448/rsd-v10i9.17817

Cited by 6 publications

(5 citation statements)

References 84 publications

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“…Figure 1C shows a linear graph showing that the higher the dose of B. subtilis, the higher the number of grains per pod, regardless of the stage at which it is applied. The bacterium acts by improving the absorption of water and nutrients and the production of antibiotics, phytohormones, and enzymes, providing growth promotion and biological control of phytopathogens, giving the plant greater resistance, and increasing the number of grains per pod (Melo et al, 2021). A different result was observed by Zucareli et al (2018) when they found that the application of Itafós (Brazilian phosphate Itafós has low reactivity, in addition to being less concentrated, with 23.2% total P2O5 and 5.5% P2O5 soluble in 2% citric acid) associated with inoculation with B. subtilis did not influence the number of grains per pod in the bean crop.This result can be explained by the effectiveness of B. subtilis in strengthening the plant defenses, improving nutrient absorption and growth as a result of increased nitrogen fixation and phytohormone synthesis, triggering an increase in metabolites that sensitize the root system to the external conditions of the environment, even providing greater plant capacity to absorb nutrients (Melo et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…The bacterium acts by improving the absorption of water and nutrients and the production of antibiotics, phytohormones, and enzymes, providing growth promotion and biological control of phytopathogens, giving the plant greater resistance, and increasing the number of grains per pod (Melo et al, 2021). A different result was observed by Zucareli et al (2018) when they found that the application of Itafós (Brazilian phosphate Itafós has low reactivity, in addition to being less concentrated, with 23.2% total P2O5 and 5.5% P2O5 soluble in 2% citric acid) associated with inoculation with B. subtilis did not influence the number of grains per pod in the bean crop.This result can be explained by the effectiveness of B. subtilis in strengthening the plant defenses, improving nutrient absorption and growth as a result of increased nitrogen fixation and phytohormone synthesis, triggering an increase in metabolites that sensitize the root system to the external conditions of the environment, even providing greater plant capacity to absorb nutrients (Melo et al, 2021). Corroborating the report by Abhilash et al (2016), multifunctional microorganisms, when associated with the plant, can promote its growth and a series of other benefits through different mechanisms of action, being expressed at various stages of plant development and presenting positive results with a direct impact on yield as was observed in this study (Figure 1C).…”

Section: Resultsmentioning

confidence: 99%

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Time and Doses of Bacillus Subtilis in Leaf Application of Bean Plants

Ferreira,

Berti,

Silva

et al. 2024

JSD

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Common beans P. vulgaris is an important food in the diet of the Brazilian population. Currently the use of microorganisms, such as B. subtillis, has been increasing significantly as an alternative to improve productivity of beans. The objective of this research was to identify the ideal dose of the commercial product (Panta Premium) based on B. subtilis, the best time and doses for leaf application, grain yield and its components and seed quality of bean. The statistical design was randomized blocks arranged in a factorial scheme (3 x 6) with four replicates. Three application times (V3, V4, and R5 stages) and six doses of the inoculant based on B. subtilis - strain UFMT Pant001 (0, 200, 400, 600, 800, and 1000 mL per ha-1) were assessed. The number of pods per plant, number of grains per plant, number of grains per pod, 1000-grain weight, grain yield, seed germination, vigor test, first germination count, and accelerated aging test were evaluated. That the 1000-grain weight was not influenced by the different doses and times of B. subtilis application. Positive linear regression with an increase in the number of pods per plant as the dose of inoculant (mL ha-1) increased when applied at the R5 stage. V3 and V4 stages, there was a linear increase (43,1 e 28,4% respectively) in the number of grains per plant as the dose of B. subtilis increased. At the R5 stage, as seen at the V3 and V4 stages, there is a linear behavior where the number of grains per plant increases as the dose of the inoculant based on B. subtilis increases. the results show that both the dose and the time of application of B. subtilis showed influence on the physiological quality of the seed. The increasing doses of B. subtilis strain UFMT Pant001 increased grain yield compared to the control. The leaf application of Bacillus subtilis strain UFMT Pant001 at stage R5 increased the number of pods and grains per plant and grain yield, regardless of the dose. The leaf application of B. subtilis strain UFMT Pant001 increased the physiological quality of the seeds, attributed to the good fertility of the soil at the site.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Time and Doses of Bacillus Subtilis in Leaf Application of Bean Plants

Ferreira,

Berti,

Silva

et al. 2024

JSD

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“…The adoption of biocontrol agents can increase productivity, improve the phytosanitary status of plants, stimulate more sustainable food production, decrease the application of pesticides and reduce the costs involved in the process (Zou et al, 2021). Several studies have identified efficient antagonist microorganisms for biological control (Dornelas et al, 2017;Melo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Biocontrol potential of actinobacteria against Pantoea ananatis, the causal agent of maize white spot disease

et al. 2023

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Pantoea ananatis is the causal agent of maize white spot, a foliar disease responsible for significant maize yield reduction worldwide, especially in Brazil. In general, the maize foliar diseases control involves the adoption of resistant genotypes and pesticides application. However, the use of agrochemicals can significantly cause increase production costs, damage to human health and negative environmental impacts. In this sense, the use of biological control agents has been considered among the most promising eco-friendly technologies for sustainable agriculture. Actinobacteria, particularly of Streptomyces genus, has been widely recognized as agroindustrially important microorganism due to its potential in producing diverse range of secondary metabolites, including antibiotics and enzymes. Thus, the aim of this work is to characterize and to evaluate the potential of soil actinobacteria for P. ananatis control. We observed that 59 actinobacteria strains (85%) exhibited proteolytic or chitinolytic activity. Only the strains Streptomyces pseudovenezuelae ACSL 470, that also exhibited high proteolytic activity, S. novaecaesareae ACSL 432 and S. laculatispora ACP 35 demonstrated high or moderate antagonist activity in vitro against P. ananatis. Temporal analysis of metabolites produced by these strains growth in different liquid media indicated greater antibacterial activity at 72 h. In this condition, chromatographic and mass spectrometry analysis revealed that S. pseudovenezuelae ACSL 470 strain produced neomycin, an aminoglycoside antibiotic that displayed high bactericidal activity in vitro against P. ananatis. This is the first report of actinobacteria acting as potential microbial antagonists for P. ananatis control. Further studies are needed to determine the control efficacy of maize white spot disease by Streptomyces strains or their metabolites in greenhouse and field conditions.

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“…Esses modos de ação são fruto da vasta produção de enzimas extracelulares e compostos tóxicos que fungos do gênero Trichoderma podem produzir e excretar. Essas enzimas são responsáveis por degradar a parede celular de outros organismos e muitos dos metabólitos liberados possuem atividade antimicrobiana (MELO, 1991;MENEZES;SOUZA, 1995).…”

Section: Trichoderma Spp : Visão Geral E O Biocontrole De Fitonematoidesunclassified

Seleção de isolados de Trichoderma spp. para o controle biológico de Meloidogyne spp. em cana-de-açúcar e tomateiro

Haddad

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A cana-de-açúcar está entre as maiores commodities mundiais e é acometida por diversas doenças e pragas. Os nematoides de galhas são uns dos mais destrutivos para a cultura, e usualmente são combatidos com produtos químicos, por isso a busca por tecnologias mais limpas para o meio ambiente e a saúde humana está cada vez maior. O objetivo desse trabalho foi selecionar isolados de Trichoderma com capacidade de promover crescimento e controlar Meloidogyne incognita e M. javanica. em cana-de-açúcar e plantas de tomate. Os isolados avaliados foram submetidos a testes de confronto direto e indireto contra os nematoides para verificar capacidade de parasitismo, liberação de compostos tóxicos voláteis e não voláteis e produção de quitinases. Nos ensaios in vivo foi avaliada a promoção de crescimento das plantas e o controle dos nematoides. Os resultados mostram que nove dentre os 16 isolados de Trichoderma avaliados foram capazes de parasitar os ovos de M. incognita. Todos emitiram metabólitos voláteis que reduziram a taxa de eclosão de J2 e dentre eles cinco isolados causaram 100% de mortalidade dos juvenis. Todas as cepas degradaram quitina em meio sólido e cinco apresentaram atividade quitinolítica em meio líquido. Nos ensaios in vivo todos os isolados colonizaram o sistema radicular da variedade de cana-de-açúcar IAC-SP-95-5000, mas somente dois (IB18/03 e IB 19/17) promoveram o crescimento das plantas com aumentos de até 32 e 29%. Os isolados IB 07/01, IB 18/03, IB 19/17, IB 22/08 e IB 38/11 reduziram a população de M. incognita em cana-de-açúcar em até 89,6% (IB 22/08). Nos ensaios com M. javanica não houve controle dos nematoides diretamente nas plantas. Houve uma redução na viabilidade dos ovos e J2 provenientes das raízes da cana, que foi refletida em menor infectividade e reprodução no bioensaio inoculado em tomate. Os isolados de Trichoderma IB 07/01 e IB 43/14 demonstraram capacidade de reduzir as futuras gerações de M. javanica em plantas de cana-de açúcar, provando ser uma excelente ferramenta para ser utilizada dentro do manejo integrado de nematoides de galha

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O gênero Bacillus aplicado ao controle biológico de doenças de plantas

Cited by 6 publications

References 84 publications

Time and Doses of Bacillus Subtilis in Leaf Application of Bean Plants

Time and Doses of Bacillus Subtilis in Leaf Application of Bean Plants

Biocontrol potential of actinobacteria against Pantoea ananatis, the causal agent of maize white spot disease

Seleção de isolados de Trichoderma spp. para o controle biológico de Meloidogyne spp. em cana-de-açúcar e tomateiro

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