Expansion of the biocontrol spectrum of foliar diseases in rice with combinations of rhizobacteria

Júnior, Ismail Teodoro de Souza; Schafer, Jaqueline Tavares; Corrêa, Bianca Obes; Funck, Gustavo Daltrozo; Moura, Andrea Bittencourt

doi:10.5935/1806-6690.20170060

Cited by 7 publications

(9 citation statements)

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“…ciceris on chickpeas (Hervás et al, 1998), and for the biocontrol bacteria combination in relation to C. lindemuthianum on beans (Corrêa et al, 2008). Additionally, Souza-Júnior et al (2017), working with the same bacteria used on this research, observed a similar behavior, that is, when bacteria that are individually effective are combined, this does not necessary lead to an increase on the control efficiency.…”

Section: Resultssupporting

confidence: 60%

“…The treatments used were the following combinations DFs-C4 (DFs185/DFs416/DFs418) and DFs-C5 (DFs306/ DFs416/DFs418), previously selected by Souza-Júnior et al (2010, 2017. For comparison purposes, the bacteria that constitute each combination were also used individually: DFs185 (Pseudomonas synxantha), DFs306 (non-identified), DFs416 and DFs418 (Bacillus sp.…”

Section: Treatments Usedmentioning

confidence: 99%

“…In Brazil, the Research Group "Biocontrol Bacteria for Plant Diseases that promote Plant Growth" from the Universidade Federal de Pelotas (UFPel) selected rhizobacteria with the potential to control B. oryzae and Gerlachia oryzae (Ludwig et al, 2009), Rhizoctonia solani (Souza-Júnior et al, 2010), Pyricularia grisea (Souza-Júnior et al, 2017) and Meloidogyne graminicola (Ludwig et al, 2013). However, these studies evaluated the ability of the treatment of seeds with rhizobacteria to reduce pathogens inoculated in young plants.…”

Section: Introductionmentioning

confidence: 99%

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Combination of biocontrol bacteria for rice seeds microbiolization: incidence and transmission of Bipolaris oryzae, and plant growth

et al. 2018

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Several fungi species are associated with rice seeds, mainly Bipolaris oryzae, since it can kill seedlings and reduce production. Thus, the objective of this research was to study the potential of pre-selected combinations of rhizobacteria [DFs-C4 (DFs185/DFs416/DFs418) and DFs-C5 (DFs306/DFs416/DFs418)], when compared to their use individually (DFs185, DFs306, DFs416, DFs418), besides DFs223, evaluating the effect on the incidence and transmission of B. oryzae, incidence of phytopathogenic fungi and in the initial growth after rice seeds microbiolization. Seeds of cultivars BRS Pelota and BRS Querência (four lots each) were immersed in suspension of these bacteria or in saline solution (control) under agitation (for 30 minutes at 10 ºC). The fungi incidence was evaluated on blotter test. The pathogen transmission was assayed in sterilized vermiculite and humid chamber at 25 ± 2 ºC. After 15 days, the severity of the symptoms and the plant growth were evaluated. For both cultivars, the best treatments were DFs185 and DFs306, reducing the fungi incidence, including B. oryzae, as well as its transmission to seedlings, resulting in seedling length increase. The combination of biocontrol bacteria, individually efficient, did not result in a lower fungi incidence, or a reduction in the transmission of B. oryzae to the seedlings or an initial increase in seedling growth. Therefore, these rhizobacteria are more efficient when used individually.Index terms: biological control, brown spot of rice, PGPR.A. B. MOURA et al.

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Section: Resultssupporting

confidence: 60%

Section: Treatments Usedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combination of biocontrol bacteria for rice seeds microbiolization: incidence and transmission of Bipolaris oryzae, and plant growth

et al. 2018

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“…Os isolados BAC06, BAC08, BAC28 foram os mais eicazes para os dois parâmetros avaliados (Tabela 4). (AL-BAHRY et al, 2013;SOUZA et al, 2014;LIU et al, 2015). Apesar de não terem sido caracterizadas neste estudo, essas moléculas podem estar envolvidas no antagonismo in vitro contra P. grisea.…”

Section: Bipolaris Oryzae Bac06unclassified

“…A doença possui alto potencial destrutivo, fazendo com que lavouras de arroz que apresentam severidade acima de 30% sejam abandonadas, devido aos danos econômicos causados (LUCAS et al, 2009). Com relação à mancha parda, a doença causa perdas tanto no rendimento quanto na qualidade dos grãos produzidos, podendo chegar a prejuízos de até 90% no rendimento (PRABHU et al, 2006;CELMER et al, 2007;SUNDER, et al, 2014). Já a mancha dos grãos, causada por um complexo de espécies fúngicas distintas, pode surgir desde a fase de emissão das panículas até o amadurecimento dos grãos e tem ganhando importância itopatológica devido aos prejuízos causados nas lavouras, com reduções de até 22% no número de grãos cheios por panícula (PRABHU et al, 2006;SANTOS et al, 2011).…”

Section: Introductionunclassified

Bioprospecção de rizobactérias para o controle in vitro de Pyricularia grisea, tratamento de sementes e promoção de crescimento de plântulas de arroz

et al. 2019

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Objetivou-se, com esse estudo, isolar e selecionar rizobactérias autóctones de arroz, com potencial para o controle in vitro de Pyricularia grisea, para o controle de fungos veiculados por sementes e para a promoção de crescimento em plântulas de arroz. Para isso, foram isoladas 18 rizobactérias autóctones de arroz, as quais foram submetidas ao teste de antibiose in vitro, em que se avaliou o índice de velocidade de crescimento micelial e o percentual de inibição de crescimento micelial. No tratamento de sementes com rizobactérias, as sementes foram bacterizadas e, posteriormente, avaliou-se a qualidade sanitária (incidência de fungos), a qualidade fisiológica (vigor, germinação e índice de velocidade de germinação de sementes) e a promoção de crescimento das plântulas. No teste de antibiose, todos os isolados apresentaram potencial de antagonismo frente à P. grisea. Houve melhorias na qualidade sanitária das sementes de arroz. Contudo, os isolados não apresentaram efeito positivo sobre a qualidade fisiológica das sementes. Três isolados induziram os maiores incrementos de parte aérea e raiz de plântulas de arroz na promoção de crescimento. Assim, conclui-se que as rizobactérias testadas apresentaram potencial de controle in vitro de fungos, em especial a P. grisea, e também para promoção de crescimento de plântulas de arroz.

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Microbial Biological Control of Diseases and Pests by PGPR and PGPF

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Barazetti

Niekawa

et al. 2019

Microbial Interventions in Agriculture and Environment

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Expansion of the biocontrol spectrum of foliar diseases in rice with combinations of rhizobacteria

Cited by 7 publications

References 2 publications

Combination of biocontrol bacteria for rice seeds microbiolization: incidence and transmission of Bipolaris oryzae, and plant growth

Combination of biocontrol bacteria for rice seeds microbiolization: incidence and transmission of Bipolaris oryzae, and plant growth

Bioprospecção de rizobactérias para o controle in vitro de Pyricularia grisea, tratamento de sementes e promoção de crescimento de plântulas de arroz

Microbial Biological Control of Diseases and Pests by PGPR and PGPF

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