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| Registros recuperados : 60 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
21/05/2012 |
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Data da última atualização: |
04/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGUIAR, N. O.; OLIVARES, F. L.; NOVOTNY, E. H.; DOBBS, L. B.; BALMORI, D. M.; SANTOS JUNIOR, L. G.; CHAGAS, J. G.; FAÇANHA, A. R.; CANELLAS, L. P. |
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Título: |
Bioactivity of humic acids isolated from vermicomposts at different maturation stages. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Plant and Soil, v. 362, p. 161-174, 2013. |
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DOI: |
https://doi.org/10.1007/s11104-012-1277-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Background and aims Vermicomposts are useful to improve environmental quality and sustainable agriculture. Moreover, it is enriched with highly bioactive humic acids (HAs)-like substances and can substitute no-renew source of humic substances to use as plant growth promoters in agriculture. The aim of this work was to evaluate the biological effects of HAs isolated at increasing vermicompost maturation stages. Methods Lateral root emergence, aqueous growth medium acidification and proton pumps of maize seedlings were used to monitor HAs bioactivity. Molecular conformation of the HAs was determined by sizeexclusion and reverse-phase high performance liquid chromatography. We applied spectroscopy 13C-NMR on VC samples to follow the humification process. Results We observed a decrease of carbohydrate content and selective preservation of hydrophobic alkyl and aryl C components by 13C-NMR during vermicompost maturation. Apparent molecular weight distribution of HAs did not change with vermicompost maturation, but was possible observed increase on hydrophobic moieties. Conclusion After 60 days of vermicomposting, all HAs promotes lateral root emergence, acidification of growth aqueous medium and induction of proton pumps without changes on apparent molecular weight but with enhance on hydrophobic domains. |
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Palavras-Chave: |
Physiological effects; Structural bioactivity ratio. |
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Thesaurus NAL: |
humic substances. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02128naa a2200265 a 4500
001 1925065
005 2021-11-04
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11104-012-1277-5$2DOI
100 1 $aAGUIAR, N. O.
245 $aBioactivity of humic acids isolated from vermicomposts at different maturation stages.$h[electronic resource]
260 $c2013
520 $aBackground and aims Vermicomposts are useful to improve environmental quality and sustainable agriculture. Moreover, it is enriched with highly bioactive humic acids (HAs)-like substances and can substitute no-renew source of humic substances to use as plant growth promoters in agriculture. The aim of this work was to evaluate the biological effects of HAs isolated at increasing vermicompost maturation stages. Methods Lateral root emergence, aqueous growth medium acidification and proton pumps of maize seedlings were used to monitor HAs bioactivity. Molecular conformation of the HAs was determined by sizeexclusion and reverse-phase high performance liquid chromatography. We applied spectroscopy 13C-NMR on VC samples to follow the humification process. Results We observed a decrease of carbohydrate content and selective preservation of hydrophobic alkyl and aryl C components by 13C-NMR during vermicompost maturation. Apparent molecular weight distribution of HAs did not change with vermicompost maturation, but was possible observed increase on hydrophobic moieties. Conclusion After 60 days of vermicomposting, all HAs promotes lateral root emergence, acidification of growth aqueous medium and induction of proton pumps without changes on apparent molecular weight but with enhance on hydrophobic domains.
650 $ahumic substances
653 $aPhysiological effects
653 $aStructural bioactivity ratio
700 1 $aOLIVARES, F. L.
700 1 $aNOVOTNY, E. H.
700 1 $aDOBBS, L. B.
700 1 $aBALMORI, D. M.
700 1 $aSANTOS JUNIOR, L. G.
700 1 $aCHAGAS, J. G.
700 1 $aFAÇANHA, A. R.
700 1 $aCANELLAS, L. P.
773 $tPlant and Soil$gv. 362, p. 161-174, 2013.
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