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Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
16/05/2013 |
Data da última atualização: |
20/05/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MARKS, B. B.; MEGÍAS, M.; NOGUEIRA, M. A.; HUNGRIA, M. |
Afiliação: |
BETTINA BERQUÓ MARKS, UEL; MANUEL MEGÍAS, Universidad de Sevilla; MARCO ANTONIO NOGUEIRA, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
Título: |
Biotechnological potential of rhizobial metabolites to enhance the performance of Bradyrhizobium spp. and Azospirillum brasiliense inoculants with soybean and maize. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
AMB Express, Heidelberg, v. 3, n. 21, p. 1-10, Apr. 2013. |
DOI: |
10.1186/2191-0855-3-21 |
Idioma: |
Inglês |
Conteúdo: |
Agricultural sustainability may represent the greatest encumbrance to increasing food production. On the other hand, as a component of sustainability, replacement of chemical fertilizers by bio-fertilizers has the potential to lower costs for farmers, to increase yields, and to mitigate greenhouse-gas emissions and pollution of water and soil. Rhizobia and plant-growth-promoting rhizobacteria (PGPR) have been broadly used in agriculture, and advances in our understanding of plant-bacteria interactions have been achieved; however, the use of signaling molecules to enhance crop performance is still modest. In this study, we evaluated the effects of concentrated metabolites (CM) from two strains of rhizobia-Bradyrhizobium diazoefficiens USDA 110T (BD1) and Rhizobium tropici CIAT 899T (RT1)?at two concentrations of active compounds (10-8 and 10-9 M)_on the performances of two major plant-microbe interactions, of Bradyrhizobium spp.-soybean (Glycine max (L.) Merr.) and Azospirillum brasilense-maize (Zea mays L.). For soybean, one greenhouse and two field experiments were performed and effects of addition of CM from the homologous and heterologous strains, and of the flavonoid genistein were investigated. For maize, three field experiments were performed to examine the effects of CM from RT1. For soybean, compared to the treatment inoculated exclusively with Bradyrhizobium, benefits were achieved with the addition of CM-BD1; at 10?9 M, grain yield was increased by an average of 4.8%. For maize, the best result was obtained with the addition of CM-RT1, also at 10?9 M, increasing grain yield by an average of 11.4%. These benefits might be related to a combination of effects attributed to secondary compounds produced by the rhizobial strains, including exopolysaccharides (EPSs), plant hormones and lipo-chitooligosaccharides (LCOs). The results emphasize the biotechnological potential of using secondary metabolites of rhizobia together with inoculants containing both rhizobia and PGPR to improve the growth and yield of grain crops. MenosAgricultural sustainability may represent the greatest encumbrance to increasing food production. On the other hand, as a component of sustainability, replacement of chemical fertilizers by bio-fertilizers has the potential to lower costs for farmers, to increase yields, and to mitigate greenhouse-gas emissions and pollution of water and soil. Rhizobia and plant-growth-promoting rhizobacteria (PGPR) have been broadly used in agriculture, and advances in our understanding of plant-bacteria interactions have been achieved; however, the use of signaling molecules to enhance crop performance is still modest. In this study, we evaluated the effects of concentrated metabolites (CM) from two strains of rhizobia-Bradyrhizobium diazoefficiens USDA 110T (BD1) and Rhizobium tropici CIAT 899T (RT1)?at two concentrations of active compounds (10-8 and 10-9 M)_on the performances of two major plant-microbe interactions, of Bradyrhizobium spp.-soybean (Glycine max (L.) Merr.) and Azospirillum brasilense-maize (Zea mays L.). For soybean, one greenhouse and two field experiments were performed and effects of addition of CM from the homologous and heterologous strains, and of the flavonoid genistein were investigated. For maize, three field experiments were performed to examine the effects of CM from RT1. For soybean, compared to the treatment inoculated exclusively with Bradyrhizobium, benefits were achieved with the addition of CM-BD1; at 10?9 M, grain yield was increased by an average of 4.... Mostrar Tudo |
Thesagro: |
Soja. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/84662/1/biotechnological.pdf
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Marc: |
LEADER 02678naa a2200181 a 4500 001 1958119 005 2014-05-20 008 2013 bl uuuu u00u1 u #d 024 7 $a10.1186/2191-0855-3-21$2DOI 100 1 $aMARKS, B. B. 245 $aBiotechnological potential of rhizobial metabolites to enhance the performance of Bradyrhizobium spp. and Azospirillum brasiliense inoculants with soybean and maize.$h[electronic resource] 260 $c2013 520 $aAgricultural sustainability may represent the greatest encumbrance to increasing food production. On the other hand, as a component of sustainability, replacement of chemical fertilizers by bio-fertilizers has the potential to lower costs for farmers, to increase yields, and to mitigate greenhouse-gas emissions and pollution of water and soil. Rhizobia and plant-growth-promoting rhizobacteria (PGPR) have been broadly used in agriculture, and advances in our understanding of plant-bacteria interactions have been achieved; however, the use of signaling molecules to enhance crop performance is still modest. In this study, we evaluated the effects of concentrated metabolites (CM) from two strains of rhizobia-Bradyrhizobium diazoefficiens USDA 110T (BD1) and Rhizobium tropici CIAT 899T (RT1)?at two concentrations of active compounds (10-8 and 10-9 M)_on the performances of two major plant-microbe interactions, of Bradyrhizobium spp.-soybean (Glycine max (L.) Merr.) and Azospirillum brasilense-maize (Zea mays L.). For soybean, one greenhouse and two field experiments were performed and effects of addition of CM from the homologous and heterologous strains, and of the flavonoid genistein were investigated. For maize, three field experiments were performed to examine the effects of CM from RT1. For soybean, compared to the treatment inoculated exclusively with Bradyrhizobium, benefits were achieved with the addition of CM-BD1; at 10?9 M, grain yield was increased by an average of 4.8%. For maize, the best result was obtained with the addition of CM-RT1, also at 10?9 M, increasing grain yield by an average of 11.4%. These benefits might be related to a combination of effects attributed to secondary compounds produced by the rhizobial strains, including exopolysaccharides (EPSs), plant hormones and lipo-chitooligosaccharides (LCOs). The results emphasize the biotechnological potential of using secondary metabolites of rhizobia together with inoculants containing both rhizobia and PGPR to improve the growth and yield of grain crops. 650 $aSoja 700 1 $aMEGÍAS, M. 700 1 $aNOGUEIRA, M. A. 700 1 $aHUNGRIA, M. 773 $tAMB Express, Heidelberg$gv. 3, n. 21, p. 1-10, Apr. 2013.
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
16/12/2019 |
Data da última atualização: |
16/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
SOBENKO, L. R.; SOUZA, T. T.; GONÇALVES, A. O.; BIANCHINI, V. J. M.; SILVA, E. H. F. M.; SOUZA, L. T.; MARIN, F. R. |
Afiliação: |
LUIZ R. SOBENKO, ESALQ/USP; TAMIRES T. SOUZA, ESALQ/USP; ALEXANDRE ORTEGA GONCALVES, CNPS; VITOR J. M. BIANCHINI, ESALQ/USP; EVANDRO H. F. M. SILVA, ESALQ/USP; LAÍS T. SOUZA, ESALQ/USP; FÁBIO R. MARIN, ESALQ/USP. |
Título: |
Irrigation requirements are lower than those usually prescribed for a maize crop in Southern Brazil. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Experimental Agriculture, v. 55, n. 4, p. 662-671, Aug. 2019. |
DOI: |
10.1017/S0014479718000339 |
Idioma: |
Inglês |
Conteúdo: |
Due to the lack of basic information on water required by maize (Zea mays L.) in Brazil, the large amount of water applied usually exceeds crop requirements, wasting water and energy. In this study, we measured crop evapotranspiration (ETc) as evaporative heat flux from a centre pivot-irrigated maize plantation in Southern Brazil during winter and summer seasons, using the Bowen ratio method to evaluate how the degree of canopy-atmosphere coupling affects crop water needs and irrigation management. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from the Penman-Monteith equation and expressed as the ETc/ETo (Kc) ratio. In this study, the average Kc values obtained were 1.31 and 0.90 for the winter and summer, respectively. Using aerodynamic and canopy resistance measurements, the decoupling factor (Omega) was computed. Omega values tending to zero (0.09 and 0.20 for winter and summer, respectively) showed that strong coupling of maize plants to the atmosphere and sensitivity to high air temperatures, vapour pressure deficits and wind speed caused variations in Kc in relation to ETo ranges. During the experimental period, the Kc value ranged from 0.92 when the ETo exceeded 4 mm d-1 to 1.64 when the ETo was less than 2 mmd-1. |
Thesagro: |
Evapotranspiração; Irrigação; Milho. |
Thesaurus NAL: |
Evapotranspiration; Irrigation; Zea mays subsp. mays. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02134naa a2200277 a 4500 001 2116972 005 2019-12-16 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1017/S0014479718000339$2DOI 100 1 $aSOBENKO, L. R. 245 $aIrrigation requirements are lower than those usually prescribed for a maize crop in Southern Brazil.$h[electronic resource] 260 $c2019 520 $aDue to the lack of basic information on water required by maize (Zea mays L.) in Brazil, the large amount of water applied usually exceeds crop requirements, wasting water and energy. In this study, we measured crop evapotranspiration (ETc) as evaporative heat flux from a centre pivot-irrigated maize plantation in Southern Brazil during winter and summer seasons, using the Bowen ratio method to evaluate how the degree of canopy-atmosphere coupling affects crop water needs and irrigation management. Irrigation requirements were determined by comparing ETc with reference evapotranspiration (ETo), derived from the Penman-Monteith equation and expressed as the ETc/ETo (Kc) ratio. In this study, the average Kc values obtained were 1.31 and 0.90 for the winter and summer, respectively. Using aerodynamic and canopy resistance measurements, the decoupling factor (Omega) was computed. Omega values tending to zero (0.09 and 0.20 for winter and summer, respectively) showed that strong coupling of maize plants to the atmosphere and sensitivity to high air temperatures, vapour pressure deficits and wind speed caused variations in Kc in relation to ETo ranges. During the experimental period, the Kc value ranged from 0.92 when the ETo exceeded 4 mm d-1 to 1.64 when the ETo was less than 2 mmd-1. 650 $aEvapotranspiration 650 $aIrrigation 650 $aZea mays subsp. mays 650 $aEvapotranspiração 650 $aIrrigação 650 $aMilho 700 1 $aSOUZA, T. T. 700 1 $aGONÇALVES, A. O. 700 1 $aBIANCHINI, V. J. M. 700 1 $aSILVA, E. H. F. M. 700 1 $aSOUZA, L. T. 700 1 $aMARIN, F. R. 773 $tExperimental Agriculture$gv. 55, n. 4, p. 662-671, Aug. 2019.
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