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Id: biblio-1253024
Autor: Canwei, Shu; Xiaoyun, Hu; Ahmed, Nauman; Shiqi, Wang; Erxun, Zhou; Meide, Liao.
Título: Fructosan form Paenibacillus kribbensis PS04 enhance disease resistance against Rhizoctonia solani and tobacco mosaic virus
Fonte: Electron. j. biotechnol;47:43-50, sept. 2020. tab, graf.
Idioma: en.
Projeto: National Key R&D Program fromthe Ministry of Science of China; . Science and Technology Plan Project of Guangzhou, China.
Resumo: BACKGROUND: Rice sheath blight (caused by Rhizoctonia solani) and tobacco mosaic virus are very important plant diseases, causing a huge loss in global crop production. Paenibacillus kribbensis PS04 is a broad-spectrum biocontrol agent, used for controlling these diseases. Previously, extracellular polysaccharides (EPS) from P. kribbensis PS04 had been purified and their structure was inferred to be fructosan. This study aimed to evaluate the effects of exogenous EPS treatment on plant­pathogen interactions. RESULTS: Plant defense genes such as phenylalanine ammonia-lyase, catalase, chitinase, allene oxide synthase, and PR1a proteins were significantly induced by exogenous EPS treatment. Moreover, subsequent challenge of EPSpretreated plants with the pathogens (R. solani or tobacco mosaic virus) resulted in higher expression of defenseassociated genes. Increased activities of defense-associated enzymes, total phenols, and flavonoids were also observed in EPS pretreated plants. The contents of malondialdehyde in plants, which act as indicator of lipid peroxidation, were reduced by EPS treatment. CONCLUSIONS: This study comprehensively showed that EPS produced from P. kribbensis PS04 enhances disease resistance in plants by the activation of defense-associated genes as well as through the enhancement of activities of defense-related enzymes.
Descritores: Doenças das Plantas/imunologia
Rhizoctonia/patogenicidade
Vírus do Mosaico do Tabaco/patogenicidade
Paenibacillus/imunologia
-Doenças das Plantas/microbiologia
Polissacarídeos Bacterianos
Controle Biológico de Vetores
Interações Hospedeiro-Patógeno
Paenibacillus/genética
Resistência à Doença/genética
Reação em Cadeia da Polimerase em Tempo Real
Frutose/análogos & derivados
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1171796
Autor: Alippi Adriana M; Reynaldi Francisco J; López Ana C.
Título: Evaluación del método epsilométrico Etest para la determinación de la sensibilidad a tetraciclina en Paenibacillus larvae, agente causal de la loque americana de las abejas / [Evaluation of the Epsilometer (Etest) method for the detection of tetracycline susceptibility in Paenibacillus larvae, the causal agent of American foulbrood disease of honeybees].
Fonte: Rev. argent. microbiol;45(4):257-61, dic. 2013.
Idioma: es.
Resumo: American foulbrood (AFB) is a bacterial disease caused by the spore-forming, grampositive bacterium Paenibacillus larvae, which affects honeybee broods worldwide. The aim of this work was to compare the Epsilometer test (Etest) to the agar dilution method for testing a collection of 22 P. larvae strains to tetracycline by using MYPGP and Iso- Sensitest agars. Results showed that a categorical agreement of 100

was found when using Iso-Sensitest, while a categorical agreement of 86.36

was found (with 3 minor errors) when MYPGP was tested. In conclusion, the Etest could be a rapid and reliable method for testing MIC values of tetracycline in P. larvae only when used in combination with Iso-Sensitest agar. Nevertheless, these results should be confirmed with future studies involving a larger number of isolates.
Descritores: Antibacterianos/farmacologia
Paenibacillus/efeitos dos fármacos
Tetraciclina/farmacologia
-Abelhas/microbiologia
Animais
Infecções por Bactérias Gram-Positivas
Testes de Sensibilidade Microbiana/métodos
Tipo de Publ: Resumo em Inglês
Artigo de Revista
Research Support, Non-U.S. Gov't
Research Support, Non-U.S. Gov't
Research Support, Non-U.S. Gov't
Responsável: AR5.1 - Centro de Gestión del Conocimiento y las Comunicaciónes


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Id: biblio-1041818
Autor: Arneodo, Joel Demián; Etcheverry, Clara; Thebe, Tumelo; Oluranti Babalola, Olubukola; Godoy, María Celina; Talia, Paola.
Título: Evidencia molecular de la ocurrencia de bacterias celulolíticas del género Cohnella en especies neotropicales de Nasutitermitinae colectadas en el NEA / Molecular evidence that cellulolytic bacterial genus Cohnella is widespread among Neotropical Nasutitermitinae from NE Argentina
Fonte: Rev. argent. microbiol;51(1):77-80, mar. 2019. graf.
Idioma: en.
Resumo: Cohnella is a highly cellulolytic bacterial genus, which can be found in a variety of habitats. The aim of this study was to assess its presence in the digestive tract of termite species collected in North-eastern Argentina: Nasutitermes aquilinus, N. corniger and Cortaritermes fulviceps. Gut homogenates were incubated with cellulosic substrate for bacterial growth. Bacterial 16S rDNA was partially amplified using new primers for Cohnella spp. and cloned. Sequences obtained showed highest similarity (97.2-99.9%) with those of Cohnella spp. previously reported from diverse environments. Phylogenetic analysis tended to group the clones according to their host species and sampling sites. These results indicate the association of Cohnella-related intestinal symbionts with three common Neotropical termites. Their potential industrial application encourages further research.

Cohnella es un género de bacterias celulolíticas que puede ser encontrado en una variedad de hábitats. El propósito de este estudio fue registrar su presencia en el tracto digestivo de termitas (Nasutitermes aquilinus, N. corniger y Cortaritermes fulviceps) colectadas en el noreste argentino (NEA). Se incubaron homogenados de intestinos en sustrato celulósico para multiplicar las bacterias. Utilizando nuevos cebadores para Cohnella spp., se amplificó una porción del ADN ribosomal 16S bacteriano, el cual fue posteriormente clonado. Las secuencias obtenidas mostraron su mayor porcentaje de similitud (97,2-99,9%) con Cohnella spp., previamente reportadas en diversos ambientes. El análisis filogenético tendió a agrupar a los clones de acuerdo a la especie hospedante y al sitio de muestreo. Estos resultados indican que especies de termitas frecuentes en el NEA albergan simbiontes intestinales relacionados con el género Cohnella. Las potenciales aplicaciones industriales de estos microorganismos animan a profundizar los estudios.
Descritores: Isópteros/microbiologia
Paenibacillus/isolamento & purificação
Paenibacillus/crescimento & desenvolvimento
-Crescimento Bacteriano/análise
Análise de Sequência de DNA/métodos
Trato Gastrointestinal/microbiologia
Tipo de Publ: Ensaio Clínico
Responsável: AR635.1 - FCVyS - Servicio de Información y Documentación


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Texto completo SciELO Brasil
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Id: biblio-976384
Autor: Pessoa, Danielle A. N; Silva, Layze C. A; Mendonça, Fábio S; Almeida, Valdir M; Lopes, José R. G; Albuquerque, Laio G; Silva, Amanda A; Riet-Correa, Franklin.
Título: Evaluation of resistance to natural poisoning by Amorimia septentrionalis in goats which had received sodium monofluoroacetate degrading bacteria / Avaliação da resistência à intoxicação natural por Amorimia septentrionalis em caprinos que receberam bactérias degradadoras de monofluoroacetato de sódio
Fonte: Pesqui. vet. bras = Braz. j. vet. res;38(10):1913-1917, out. 2018. tab, ilus.
Idioma: en.
Projeto: CNPq.
Resumo: Amorimia septentrionalis is an important sodium monofluoroacetate (MFA) containing plant that causes sudden death in ruminants in northeastern Brazil. MFA degrading bacteria are being used in the prevention against poisoning by this plant. The aim of this study was to evaluate if goats which had per os received MFA degrading bacteria remained resistant when exposed to natural poisoning by A. septentrionalis. Eighteen goats were randomly distributed into three groups: the goats of Group 1 previously received, during 40 days, a solution containing the bacteria Ralstonia sp. and Burkholderia sp., those goats in the Group 2 received the bacteria Paenibacillus sp. and Cupriavidus sp. and goats from Group 3 did not receive any bacteria. After the administration period, during 60 days, the animals of all groups were released to graze on a one hectare paddock, with significant amount of A. septentrionalis. They were observed daily for the spontaneous consumption of A. septentrionalis leaves and the occurrence of clinical signs of poisoning or sudden death. Goats from all groups consumed significant amounts of A. septentrionalis during the experimental period. Goats that did not receive MFA-degrading bacteria (Group 3) became sick and died from the 25th to the 27th day of the experiment, whereas the goats of the groups that received MFA-degrading bacteria showed only clinical sings when A. septentrionalis regrowth after the 55th day of the experiment. The days elapsed from field observation to death of Group 3 goats (25.5±0.9 days) were significantly lower (p<0.05) than Group 1 (58.6±1.3 days) and Group 2 (57.8±1.5 days). Thus, it can be concluded that administration of MFA degrading bacteria increases the resistance to natural poisoning by A. septentrionalis.(AU)

Amorimia septentrionalis que contém monofluoroacetato de sódio (MFA) é responsável pela ocorrência de mortes súbitas em ruminantes no nordeste do Brasil. Bactérias degradadoras desse composto estão sendo utilizadas na prevenção contra a intoxicação por essa planta. O objetivo deste estudo foi avaliar se caprinos que receberam, via oral, bactérias degradadoras de MFA permaneciam resistentes quando expostos a intoxicação natural por A. septentrionalis. Dezoito caprinos foram divididos em três grupos, os caprinos do Grupo 1 receberam anteriormente, durante 40 dias, uma solução contendo as bactérias Ralstonia sp. e Burkholderia sp., os do Grupo 2 receberam, também por 40 dias as bactérias Paenibacillus sp. e Cupriavidus sp. e os do Grupo 3 não receberam nenhuma bactéria. Após o período de administração, durante 60 dias, os animais de todos os grupos foram soltos para pastar em um piquete de um hectare, que apresentava uma quantidade significativa da planta. Diariamente eles foram observados quanto ao consumo espontâneo das folhas de A. septentrionalis e quanto à presença de sinais clínicos de intoxicação ou morte. Os caprinos de todos os grupos consumiram quantidades significantes da planta durante o período experimental. Os caprinos que não receberam as bactérias degradantes de MFA (Grupo 3) adoeceram e morreram entre o 25º e o 27º dia de experimento, enquanto que os que receberam as bactérias degradantes de MFA (Grupo 1 e 2) só apresentaram sinais clínicos no 55º dia de experimento, o que coincidiu com a rebrota da planta. Os dias transcorridos desde a observação a campo até a morte dos caprinos do Grupo 3 (25,5±0,9 dias) foram significativamente menores (p<0,05) que os do Grupo 1 (58,6±1,3 dias) e do Grupo 2 (57,8±1,5 dias). Com isso pode-se concluir que a administração de bactérias degradadoras de MFA aumenta à resistência a intoxicação natural por A. septentrionalis.(AU)
Descritores: Intoxicação por Plantas/terapia
Intoxicação por Plantas/veterinária
Bactérias/enzimologia
Ruminantes
Malpighiaceae/envenenamento
Fluoracetatos/antagonistas & inibidores
-Burkholderia
Ralstonia
Cupriavidus
Paenibacillus
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Texto completo SciELO Brasil
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Id: biblio-889178
Autor: Liu, Di; Yang, Qianqian; Ge, Ke; Hu, Xiuna; Qi, Guozhen; Du, Binghai; Liu, Kai; Ding, Yanqin.
Título: Promotion of iron nutrition and growth on peanut by Paenibacillus illinoisensis and Bacillus sp. strains in calcareous soil
Fonte: Braz. j. microbiol;48(4):656-670, Oct.-Dec. 2017. tab, graf.
Idioma: en.
Projeto: National Natural Science Foundation of China; . Science and Technology Major Projects of Shandong Province.
Resumo: ABSTRACT This study aimed to explore the effects of two siderophore-producing bacterial strains on iron absorption and plant growth of peanut in calcareous soil. Two siderophore-producing bacterial strains, namely, YZ29 and DZ13, isolated from the rhizosphere soil of peanut, were identified as Paenibacillus illinoisensis and Bacillus sp., respectively. In potted experiments, YZ29 and DZ13 enhanced root activity, chlorophyll and active iron content in leaves, total nitrogen, phosphorus and potassium accumulation of plants and increased the quality of peanut kernels and plant biomass over control. In the field trial, the inoculated treatments performed better than the controls, and the pod yields of the three treatments inoculated with YZ29, DZ13, and YZ29 + DZ13 (1:1) increased by 37.05%, 13.80% and 13.57%, respectively, compared with the control. Based on terminal restriction fragment length polymorphism analysis, YZ29 and DZ13 improved the bacterial community richness and species diversity of soil surrounding the peanut roots. Therefore, YZ29 and DZ13 can be used as candidate bacterial strains to relieve chlorosis of peanut and promote peanut growth. The present study is the first to explore the effect of siderophores produced by P. illinoisensis on iron absorption.
Descritores: Arachis/crescimento & desenvolvimento
Arachis/microbiologia
Bacillus/metabolismo
Paenibacillus/metabolismo
Ferro/metabolismo
-Arachis/metabolismo
Arachis/química
Sementes/crescimento & desenvolvimento
Sementes/metabolismo
Sementes/microbiologia
Sementes/química
Solo/química
Microbiologia do Solo
Bacillus/isolamento & purificação
Bacillus/classificação
Bacillus/genética
Transporte Biológico
Sideróforos/metabolismo
Raízes de Plantas/microbiologia
Paenibacillus/isolamento & purificação
Paenibacillus/classificação
Paenibacillus/genética
Rizosfera
Inoculantes Agrícolas/metabolismo
Responsável: BR1.1 - BIREME


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Id: lil-769669
Autor: Zhao, Longfei; Xu, Yajun; Lai, Xin-He; Shan, Changjuan; Deng, Zhenshan; Ji, Yuliang.
Título: Screening and characterization of endophytic Bacillus and Paenibacillus strains from medicinal plant Lonicera japonica for use as potential plant growth promoters
Fonte: Braz. j. microbiol;46(4):977-989, Oct.-Dec. 2015. tab, graf.
Idioma: en.
Projeto: National Science Foundation of China; . Henan Provincial Education Department of Science and Technology Research Key Research Project; . Ministry of Education of Henan Province.
Resumo: Abstract A total of 48 endophytic bacteria were isolated from surface-sterilized tissues of the medicinal plant Lonicera japonica, which is grown in eastern China; six strains were selected for further study based on their potential ability to promote plant growth in vitro (siderophore and indoleacetic acid production). The bacteria were characterized by phylogenetically analyzing their 16S rRNA gene similarity, by examining their effect on the mycelial development of pathogenic fungi, by testing their potential plant growth-promoting characteristics, and by measuring wheat growth parameters after inoculation. Results showed that the number of endophytic bacteria in L. japonica varied among different tissues, but it remained relatively stable in the same tissues from four different plantation locations. Among the three endophytic strains, strains 122 and 124 both had high siderophore production, with the latter showing the highest phosphate solubilization activity (45.6 mg/L) and aminocyclopropane-1-carboxylic acid deaminase activity (47.3 nmol/mg/h). Strain 170 had the highest indoleacetic acid (IAA) production (49.2 mg/L) and cellulase and pectinase activities. After inoculation, most of the six selected isolates showed a strong capacity to promote wheat growth. Compared with the controls, the increase in the shoot length, root length, fresh weight, dry weight, and chlorophyll content was most remarkable in wheat seedlings inoculated with strain 130. The positive correlation between enzyme (cellulose and pectinase) activity and inhibition rate on Fusarium oxysporum, the IAA production, and the root length of wheat seedlings inoculated with each tested endophytic strain was significant in regression analysis. Deformity of pathogenic fungal mycelia was observed under a microscope after the interaction with the endophytic isolates. Such deformity may be directly related to the production of hydrolytic bacterial enzymes (cellulose and pectinase). The six endophytic bacterial strains were identified to be Paenibacillus and Bacillus strains based on the results of 16S rRNA gene sequencing analysis and their physiological and biochemical characteristics. Results indicate the promising application of endophytic bacteria to the biological control of pathogenic fungi and the improvement of wheat crop growth.
Descritores: Bacillus/classificação
Bacillus/genética
Bacillus/crescimento & desenvolvimento
Bacillus/isolamento & purificação
Bacillus/metabolismo
Bacillus/microbiologia
China/classificação
China/genética
China/crescimento & desenvolvimento
China/isolamento & purificação
China/metabolismo
China/microbiologia
Endófitos/classificação
Endófitos/genética
Endófitos/crescimento & desenvolvimento
Endófitos/isolamento & purificação
Endófitos/metabolismo
Endófitos/microbiologia
Ácidos Indolacéticos/classificação
Ácidos Indolacéticos/genética
Ácidos Indolacéticos/crescimento & desenvolvimento
Ácidos Indolacéticos/isolamento & purificação
Ácidos Indolacéticos/metabolismo
Ácidos Indolacéticos/microbiologia
Lonicera/classificação
Lonicera/genética
Lonicera/crescimento & desenvolvimento
Lonicera/isolamento & purificação
Lonicera/metabolismo
Lonicera/microbiologia
Dados de Sequência Molecular/classificação
Dados de Sequência Molecular/genética
Dados de Sequência Molecular/crescimento & desenvolvimento
Dados de Sequência Molecular/isolamento & purificação
Dados de Sequência Molecular/metabolismo
Dados de Sequência Molecular/microbiologia
Paenibacillus/classificação
Paenibacillus/genética
Paenibacillus/crescimento & desenvolvimento
Paenibacillus/isolamento & purificação
Paenibacillus/metabolismo
Paenibacillus/microbiologia
Filogenia/classificação
Filogenia/genética
Filogenia/crescimento & desenvolvimento
Filogenia/isolamento & purificação
Filogenia/metabolismo
Filogenia/microbiologia
Raízes de Plantas/classificação
Raízes de Plantas/genética
Raízes de Plantas/crescimento & desenvolvimento
Raízes de Plantas/isolamento & purificação
Raízes de Plantas/metabolismo
Raízes de Plantas/microbiologia
Sideróforos/classificação
Sideróforos/genética
Sideróforos/crescimento & desenvolvimento
Sideróforos/isolamento & purificação
Sideróforos/metabolismo
Sideróforos/microbiologia
Triticum/classificação
Triticum/genética
Triticum/crescimento & desenvolvimento
Triticum/isolamento & purificação
Triticum/metabolismo
Triticum/microbiologia
Responsável: BR1.1 - BIREME


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Texto completo SciELO Brasil
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Id: lil-749711
Autor: Marra, Leandro M.; Oliveira-Longatti, Silvia M. de; Soares, Cláudio R.F.S.; Lima, José M. de; Olivares, Fabio L.; Moreira, Fatima M.S..
Título: Initial pH of medium affects organic acids production but do not affect phosphate solubilization
Fonte: Braz. j. microbiol;46(2):367-375, Apr-Jun/2015. tab, graf.
Idioma: en.
Projeto: CNPq.
Resumo: The pH of the culture medium directly influences the growth of microorganisms and the chemical processes that they perform. The aim of this study was to assess the influence of the initial pH of the culture medium on the production of 11 low-molecular-weight organic acids and on the solubilization of calcium phosphate by bacteria in growth medium (NBRIP). The following strains isolated from cowpea nodules were studied: UFLA03-08 (Rhizobium tropici), UFLA03-09 (Acinetobacter sp.), UFLA03-10 (Paenibacillus kribbensis), UFLA03-106 (Paenibacillus kribbensis) and UFLA03-116 (Paenibacillus sp.). The strains UFLA03-08, UFLA03-09, UFLA03-10 and UFLA03-106 solubilized Ca3(PO4)2 in liquid medium regardless of the initial pH, although without a significant difference between the treatments. The production of organic acids by these strains was assessed for all of the initial pH values investigated, and differences between the treatments were observed. Strains UFLA03-09 and UFLA03-10 produced the same acids at different initial pH values in the culture medium. There was no correlation between phosphorus solubilized from Ca3(PO4)2 in NBRIP liquid medium and the concentration of total organic acids at the different initial pH values. Therefore, the initial pH of the culture medium influences the production of organic acids by the strains UFLA03-08, UFLA03-09, UFLA03-10 and UFLA03-106 but it does not affect calcium phosphate solubilization.
Descritores: Acinetobacter/metabolismo
Ácidos Carboxílicos/metabolismo
Meios de Cultura/química
Paenibacillus/metabolismo
Fosfatos/metabolismo
Rhizobium tropici/metabolismo
-Acinetobacter/crescimento & desenvolvimento
Acinetobacter/isolamento & purificação
Fabaceae/microbiologia
Concentração de Íons de Hidrogênio
Paenibacillus/crescimento & desenvolvimento
Paenibacillus/isolamento & purificação
Rhizobium tropici/crescimento & desenvolvimento
Rhizobium tropici/isolamento & purificação
Nódulos Radiculares de Plantas/microbiologia
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-548033
Autor: Erturk, Yasar; Ercisli, Sezai; Haznedar, Ayhan; Cakmakci, Ramazan.
Título: Effects of plant growth promoting rhizobacteria (PGPR) on rooting and root growth of kiwifruit (Actinidia deliciosa) stem cuttings
Fonte: Biol. Res;43(1):91-98, 2010. tab.
Idioma: en.
Resumo: The effects of plant growth promoting rhizobacteria (PGPR) on the rooting and root growth of semi-hardwood and hardwood kiwifruit stem cuttings were investigated. The PGPR used were Bacillus RC23, Paenibacillus polymyxa RC05, Bacillus subtilis OSU142, Bacillus RC03, Comamonas acidovorans RC41, Bacillus megaterium RC01 and Bacillus simplex RC19. All the bacteria showed indole-3-acetic acid (IAA) producing capacity. Among the PGPR used, the highest rooting ratios were obtained at 47.50 percent for semi-hardwood stem cuttings from Bacillus RC03 and Bacillus simplex RC19 treatments and 42.50 percent for hardwood stem cuttings from Bacillus RC03. As well, Comamonas acidovorans RC41 inoculations indicated higher value than control treatments. The results suggest that these PGPR can be used in organic nursery material production and point to the feasibility of synthetic auxin (IBA) replacement by organic management based on PGPR.
Descritores: Actinidia/crescimento & desenvolvimento
Ácidos Indolacéticos/farmacologia
Reguladores de Crescimento de Plantas/farmacologia
Raízes de Plantas/crescimento & desenvolvimento
Caules de Planta/crescimento & desenvolvimento
-Actinidia/efeitos dos fármacos
Bacillus/química
Delftia acidovorans/química
Paenibacillus/química
Raízes de Plantas/efeitos dos fármacos
Caules de Planta/efeitos dos fármacos
Responsável: BR1.1 - BIREME



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