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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Unidades Centrais. |
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Data corrente: |
03/07/2003 |
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Data da última atualização: |
18/01/2010 |
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Autoria: |
TEIXEIRA, K. R. dos S. |
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Título: |
O Mecanismo de regulação da FBN e sua diversidade. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Seropédica: EMBRAPA-CNPAB, 1997. |
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Páginas: |
25 p. |
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Série: |
(Embrapa-CNPAB. Documentos, 40).
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ISSN: |
0104-6187 |
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Idioma: |
Português |
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Conteúdo: |
Regulação da FBN no grupo dos rhizobios. Regulação da FBN em azospirillun brasiliense. Regulação da FBN em herbaspirillun seropedicae. Regulação da FBN em acetobacter diazotrophicus. |
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Palavras-Chave: |
Acetobacter diazotrophicus; FBN; Fixação biológica de nitrogênio. |
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Thesagro: |
Gene; Genética; Nitrogênio. |
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Thesaurus Nal: |
Azospirillum brasilense; Herbaspirillum seropedicae. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPAB-2010/27231/1/doc040.pdf
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Marc: |
LEADER 00856nam a2200241 a 4500
001 1624245
005 2010-01-18
008 1997 bl uuuu u0uu1 u #d
022 $a0104-6187
100 1 $aTEIXEIRA, K. R. dos S.
245 $aO Mecanismo de regulação da FBN e sua diversidade.
260 $aSeropédica: EMBRAPA-CNPAB$c1997
300 $a25 p.
490 $a(Embrapa-CNPAB. Documentos, 40).
520 $aRegulação da FBN no grupo dos rhizobios. Regulação da FBN em azospirillun brasiliense. Regulação da FBN em herbaspirillun seropedicae. Regulação da FBN em acetobacter diazotrophicus.
650 $aAzospirillum brasilense
650 $aHerbaspirillum seropedicae
650 $aGene
650 $aGenética
650 $aNitrogênio
653 $aAcetobacter diazotrophicus
653 $aFBN
653 $aFixação biológica de nitrogênio
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
09/11/2012 |
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Data da última atualização: |
16/07/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GUIMARÃES, F. P.; AGUIAR, R.; OLIVEIRA, J. A.; SILVA, J. A. A.; KARAM, D. |
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Afiliação: |
DECIO KARAM, CNPMS. |
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Título: |
Potential of macrophyte for removing arsenic from aqueous solution. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Planta Daninha, Viçosa, MG, v. 30, n. 4, p. 683-696, 2012. |
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DOI: |
10.1590/S0100-83582012000400001. |
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Idioma: |
Inglês |
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Conteúdo: |
The potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation. MenosThe potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the t... Mostrar Tudo |
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Palavras-Chave: |
Biorremediação; Fitorremediação. |
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Thesagro: |
Planta Aquatica; Poluente. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/69793/1/Potential-macrophyte.pdf
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Marc: |
LEADER 02530naa a2200229 a 4500
001 1939307
005 2018-07-16
008 2012 bl uuuu u00u1 u #d
024 7 $a10.1590/S0100-83582012000400001.$2DOI
100 1 $aGUIMARÃES, F. P.
245 $aPotential of macrophyte for removing arsenic from aqueous solution.$h[electronic resource]
260 $c2012
520 $aThe potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM-1, respectively, when exposed to 5.0 mg L-1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation.
650 $aPlanta Aquatica
650 $aPoluente
653 $aBiorremediação
653 $aFitorremediação
700 1 $aAGUIAR, R.
700 1 $aOLIVEIRA, J. A.
700 1 $aSILVA, J. A. A.
700 1 $aKARAM, D.
773 $tPlanta Daninha, Viçosa, MG$gv. 30, n. 4, p. 683-696, 2012.
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