Obtenção de bactérias para a o biocontrole de Meloidogyne javanica por meio de aquecimento de solo e tratamento com filtrado de raízes de plantas antagonistas a fitonematóides

Fabry, C. F. S.; Freitas, Leandro Grassi de; Neves, W. S.; Coutinho, Marcelo M.; Tótola, Marcos Rogério; Oliveira, José Rogério de; Dallemole-Giaretta, Rosângela; Ferraz, S.

doi:10.1590/s0100-41582007000100013

Cited by 5 publications

(6 citation statements)

References 6 publications

(4 reference statements)

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“…The promotion of plant growth due to the treatment with Bacillus species depends mainly on the ability of the microbial isolate to interact with the host (Carneiro et al, 1988;Kerry & Bourne, 2002;Machado et al, 2010), which may not happen for all hosts. Similar results were obtained by other authors when using Bacillus (Fabry et al, 2007;Fernandes et al, 2013;Machado et al, 2012). Possibly such microorganisms are not growth promoters in the host plants used in these studies.…”

Section: Species Of Microorganism Used In Biocontrolsupporting

confidence: 90%

Microorganisms in the biological control of root-knot nematode: A metanalytical study

Benedetti

Huzar‐Novakowiski

Sordi

et al. 2021

RSD

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Nematodes can cause annual losses in the order of 100 billion dollars in crops worldwide. Its control using chemical nematicides proves to be quite aggressive to the environment. For this reason, the management of microorganisms has been promising. However, it is essential to know the control potential of each organism. Thus, the objective of this study was to verify the efficiency of different microorganisms in the biological control of Meloidogyne sp. A systematic review of the literature was carried out from 2000 to 2020 with the keywords “Meloidogyne and biology control", resulting in 659 articles, of which 51 were pre-selected and, after the more detailed evaluation, was selected ten published articles. These ten articles generated a total of 83 studies for meta-analyses. Each study included a treatment group using some microorganisms (bacteria, fungus, actinomycetes) for nematode biocontrol, a control group without using biocontrol agents. From this meta-analysis, we can observe that the use of microorganisms decreased the number of galls (42.05%), the number of eggs (57.77%), the gall index (28.58%) and the eggs mass (53.48%). The use of microorganisms was also positive in increasing root mass (832.89%). We can conclude that the use of microorganisms proved to be efficient in controlling nematodes M. javanica and M. incognita. The fungi Pleurotus ostreatus and Phanerochaete chrysosporium have more significant potential for biocontrol for these species.

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Section: Species Of Microorganism Used In Biocontrolsupporting

confidence: 90%

Microorganisms in the biological control of root-knot nematode: A metanalytical study

Benedetti

Huzar‐Novakowiski

Sordi

et al. 2021

RSD

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“…Zhao and Lin (2005) reported that this species inhibited PWN reproduction. As described for C. freundii, E. coli also proved to be efficient for the control of the nematode Meloidogyne javanica, reducing number of galls in 80% (Fabry et al, 2007). Species diversity from nematodes was not very large compared to those isolated from trees, which indicates that nematodes, apart from owning bacteria in their body, establish symbiotic relationships with bacteria from inside the tree during the infection process, and so all these dynamics can contribute to symptom disease development.…”

Section: Identification Of Bacteria By Molecular Methodsmentioning

confidence: 85%

“…From the avirulent isolate, a unique species was identified: Citrobacter freundii. This species has been described as a possible control agent for the nematode Meloidogyne javanica, being found in water, sewage, soil and food (Fabry et al, 2007).…”

Section: Identification Of Bacteria By Molecular Methodsmentioning

confidence: 99%

Population dynamics of bacteria associated with different strains of the pine wood nematode Bursaphelenchus xylophilus after inoculation in maritime pine (Pinus pinaster)

Roriz

Santos

Vasconcelos

2011

Experimental Parasitology

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For a long time it was thought that Bursaphelenchus xylophilus was the only agent of the pine wilt disease. Recently, it was discovered that there are bacteria associated with the nematodes that contribute to the pathogenesis of this disease, mainly through the release of toxins that promote the death of the pines. Among the species most commonly found, are bacteria belonging to the Bacillus, Pantoea, Pseudomonas and Xanthomonas genera. The main objective of this work was to study the effect of inoculation of maritime pine (Pinus pinaster) with four different nematode isolates, in the bacterial population of nematodes and trees, at different stages of disease progression. The monitoring of progression of disease symptoms was also recorded. Also, the identification of bacteria isolated from the xylem of trees and the surface of nematodes was performed by classical identification methods, by the API20E identification system and by sequencing of bacterial DNA. The results showed that for the symptoms progression, the most striking difference was observed for the pines inoculated with the avirulent isolate, C14-5, which led to a slower and less severe aggravation of symptoms than in pines inoculated with the virulent isolates. In general, it was found that bacterial population, inside the tree, increased with disease progression. A superior bacterial quantity was isolated from pines inoculated with the nematode isolates HF and 20, and, comparatively, few bacteria were isolated from pines inoculated with the avirulent isolate. The identification system API20E was insufficient in the identification of bacterial species; Enterobacter cloacae species was identified in 79% of the isolated bacterial colonies and seven of these colonies could not be identified by this method. Molecular identification methods, through bacterial DNA sequencing, allowed a more reliable identification: eleven different bacterial species within the Bacillus, Citrobacter, Enterobacter, Escherichia, Klebsiella, Paenibacillus, Pantoea and Terribacillus genera were identified. General bacterial diversity increased with the progression of the disease. Bacillus spp. were predominant at the earlier stage of disease progression and Klebsiella oxytoca at the later stages. Furthermore, bacterial species isolated from the surface of nematodes were similar to those isolated from the xylem of pines. In the present work new bacterial species were identified which have never been reported before in this type of study and may be associated with their geographical origin (Portugal). P. pinaster, the pine species used in this study, was different from those commonly grown in Japan and China. Furthermore, it was the first time that bacteria were isolated and identified from an avirulent pine wood nematode isolate.

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“…As bactérias DFs416, DFs418, DFs419, DFs422 e DFs471 * Médias seguidas de mesma letra não diferem entre si pelo teste de Duncan a 5% de probabilidade * (Fabry et al, 2007). Aumento da mortalidade dos J2 de M. graminicola proporcionado por maior período de exposição (48 horas) também já foi relatado por Naves et al (2004) para outras espécies.…”

unclassified

Potencial da microbiolização de sementes de arroz com rizobactérias para o biocontrole do nematoide das galhas

Ludwig¹,

Moura²,

Gomes³

2013

Trop. plant pathol.

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Potential of microbiolization of rice seeds with rhizobacteria for root-knot nematode biocontrolThe potential of eight rhizobacteria that effectively control fungal diseases in rice [DFs185 (Pseudomonas synxantha), DFs223 (P. fluorescens), DFs306 (not identified), DFs416, DFs418 e DFs419 (Bacillus sp.), DFs422 (Bacillus subtilis), DFs471 (Stenotrophomonas malthophilia)] was evaluated for the control of Meloidogyne graminicola in vitro and in irrigated rice in the greenhouse. The rhizobacteria DFs185, DFs223, DFs306, DFs416 and DFs419 exceeded in reducing hatching and in increasing the mortality of M. graminicola J2. All rhizobacteria were able to produce at least one compound associated with the biocontrol of nematodes (chitinasis, phosphatases, lipases, proteinasis and siderophores). The number of eggs and galls of M. graminicola in rice plants was reduced compared to plants from seeds not microbiolized. The nematode reproduction factor was reduced on average by 29%, highlighting rhizobacteria DFs185 and DFs223 that reduced 35%. This result is significant because the rhizobacteria also control fungal diseases.

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Obtenção de bactérias para a o biocontrole de Meloidogyne javanica por meio de aquecimento de solo e tratamento com filtrado de raízes de plantas antagonistas a fitonematóides

Cited by 5 publications

References 6 publications

Microorganisms in the biological control of root-knot nematode: A metanalytical study

Microorganisms in the biological control of root-knot nematode: A metanalytical study

Population dynamics of bacteria associated with different strains of the pine wood nematode Bursaphelenchus xylophilus after inoculation in maritime pine (Pinus pinaster)

Potencial da microbiolização de sementes de arroz com rizobactérias para o biocontrole do nematoide das galhas

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