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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
22/11/2002 |
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Data da última atualização: |
12/09/2019 |
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Autoria: |
VETTORAZZO, S. C.; do COUTO, H. T. Z. |
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Título: |
Padronizacao de amostragem para diagnose nutricional e variacoes nas concentracoes de nutrientes nas aciculas de PINUS TAEDA L.: II. micronutrientes. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Revista Brasileira de Ciencia do Solo, Campinas, v.21, n.1, 59-64, 1997. |
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Idioma: |
Português |
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Conteúdo: |
As concentracoes de B,Cu,Fe,Mn e Zn nas aciculas jovens (1), com seis meses, e nas maduras (2), com um ano, coletadas nos tercos superior (S), mediano (M) e inferior (I) da copa de arvores de Pinus taeda com seis e onze anos, foram determinadas em duas estacoes do ano (verao e inverno), em 1992, no municipio de Telemaco Borda (PR). As concentracoes medias de micronutrientes nas aciculas variaram em 17-30 mg kg para B; 3,3-8,4 mg kg para Cu; 72-225 mg kg para Fe; 222-712 mg kg para Mn e 14-32 mg kg para Zn. No geral, a amostragem para diagnose nutricionalde micronutrientes em P. taeda, com seis ou onze anos, deve ser feita em , aproximadamente, 36 arvores, selecionadas em todas as classes de diametro, com base nos seguintes criterios: B e Fe - nas posicoes M2 e I 2, durante o verao; Cu - na posicao S1, durante o inverno; Mn - naposicao I2, durante o verao, e Zn - na posicao M 2, durante o inverno. A padronizacao que restringe a amostragem em uma idade de folhagem, uma posicao na copa e um periodo do ano, sugere a coleta de aciculas jovens na posicao S 1 na copa em 46 arvores, durante o inverno. |
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Thesagro: |
Latossolo Vermelho Escuro. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01636naa a2200145 a 4500
001 1335774
005 2019-09-12
008 1997 bl uuuu u00u1 u #d
100 1 $aVETTORAZZO, S. C.
245 $aPadronizacao de amostragem para diagnose nutricional e variacoes nas concentracoes de nutrientes nas aciculas de PINUS TAEDA L.$bII. micronutrientes.
260 $c1997
520 $aAs concentracoes de B,Cu,Fe,Mn e Zn nas aciculas jovens (1), com seis meses, e nas maduras (2), com um ano, coletadas nos tercos superior (S), mediano (M) e inferior (I) da copa de arvores de Pinus taeda com seis e onze anos, foram determinadas em duas estacoes do ano (verao e inverno), em 1992, no municipio de Telemaco Borda (PR). As concentracoes medias de micronutrientes nas aciculas variaram em 17-30 mg kg para B; 3,3-8,4 mg kg para Cu; 72-225 mg kg para Fe; 222-712 mg kg para Mn e 14-32 mg kg para Zn. No geral, a amostragem para diagnose nutricionalde micronutrientes em P. taeda, com seis ou onze anos, deve ser feita em , aproximadamente, 36 arvores, selecionadas em todas as classes de diametro, com base nos seguintes criterios: B e Fe - nas posicoes M2 e I 2, durante o verao; Cu - na posicao S1, durante o inverno; Mn - naposicao I2, durante o verao, e Zn - na posicao M 2, durante o inverno. A padronizacao que restringe a amostragem em uma idade de folhagem, uma posicao na copa e um periodo do ano, sugere a coleta de aciculas jovens na posicao S 1 na copa em 46 arvores, durante o inverno.
650 $aLatossolo Vermelho Escuro
700 1 $ado COUTO, H. T. Z.
773 $tRevista Brasileira de Ciencia do Solo, Campinas$gv.21, n.1, 59-64, 1997.
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Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
15/08/2023 |
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Data da última atualização: |
30/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 3 |
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Autoria: |
DORNELAS, J. C. M.; CARMO, P. H. F.; LANA, U. G. de P.; LANA, M. A. G.; OLIVEIRA-PAIVA, C. A.; MARRIEL, I. E. |
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Afiliação: |
JOÃO CARLOS MAIA DORNELAS, Universidade Federal de Minas Gerais; PAULO HENRIQUE FONSECA DO CARMO, Universidade Federal de Minas Gerais; UBIRACI GOMES DE PAULA LANA, CNPMS; MARY ANE GONÇALVES LANA, Laboratório Nacional Agropecuário; CHRISTIANE ABREU DE OLIVEIRA PAIVA, CNPMS; IVANILDO EVODIO MARRIEL, CNPMS. |
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Título: |
Biocontrol potential of actinobacteria against Pantoea ananatis, the causal agent of maize white spot disease. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Brazilian Journal of Biology, v. 83, e268015, 2023. |
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DOI: |
https://doi.org/10.1590/1519-6984.268015 |
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Idioma: |
Inglês |
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Conteúdo: |
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. MenosPantoea 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. pseudoven... Mostrar Tudo |
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Thesagro: |
Actinomiceto; Antagonismo; Controle Biológico; Doença de Planta; Folha; Mancha Branca; Milho. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1155909/1/Biocontrol-potential-of-actinobacteria-against-Pantoea-ananatis.pdf
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Marc: |
LEADER 02764naa a2200277 a 4500
001 2155909
005 2023-11-30
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/1519-6984.268015$2DOI
100 1 $aDORNELAS, J. C. M.
245 $aBiocontrol potential of actinobacteria against Pantoea ananatis, the causal agent of maize white spot disease.$h[electronic resource]
260 $c2023
520 $aPantoea 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.
650 $aActinomiceto
650 $aAntagonismo
650 $aControle Biológico
650 $aDoença de Planta
650 $aFolha
650 $aMancha Branca
650 $aMilho
700 1 $aCARMO, P. H. F.
700 1 $aLANA, U. G. de P.
700 1 $aLANA, M. A. G.
700 1 $aOLIVEIRA-PAIVA, C. A.
700 1 $aMARRIEL, I. E.
773 $tBrazilian Journal of Biology$gv. 83, e268015, 2023.
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