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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Arroz e Feijão. |
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Data corrente: |
07/12/2004 |
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Data da última atualização: |
07/05/2007 |
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Autoria: |
REIS JÚNIOR, F. B. dos; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M. |
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Título: |
Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2003. |
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Páginas: |
52 p. |
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Série: |
(Embrapa Cerrados. Documentos, 81). |
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Idioma: |
Português |
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Conteúdo: |
A situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective effect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospiri!lum genus associated with the roots of these plants. Different pastures (B. humidicola, B. decumbens and B. brizan!ha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The co!lects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and quantification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasilense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 1 Q3 -107 ce!ls. 9 of roots-l. In the samples of the Cerrado ecosystem, the co!lect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospiri!lum spp. associated to its roots. Index terms: Azospiri!lum amazonense, biological nitrogen fixation, pastures degradation. MenosA situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria ex... Mostrar Tudo |
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Palavras-Chave: |
Bactéira diazotrófica; Biological nitrogen fixation; BNF; Braquiária; Degredação; Diazotrophy bacteria; FBN; Fixação biológica de nitrogênio; Growth. |
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Thesagro: |
Bactéria; Brachiaria; Crescimento; Fixação de Nitrogênio; Microbiologia do Solo; Pastagem. |
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Thesaurus Nal: |
Azospirillum amazonense; degradation; microbiology; nitrogen fixation; pastures; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04272nam a2200421 a 4500
001 1214969
005 2007-05-07
008 2003 bl uuuu u0uu1 u #d
100 1 $aREIS JÚNIOR, F. B. dos
245 $aAssociação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria.
260 $aPlanaltina, DF: Embrapa Cerrados$c2003
300 $a52 p.
490 $a(Embrapa Cerrados. Documentos, 81).
520 $aA situação das pastagens no Brasil. Pastagens de braquiária. Impacto ambiental das pastagens de Brachiaria. Degradação de pastagens. Utilização de leguminosas em pastos de Brachiaria. Fixação biológica de nitrogênio por bactérias associadas a Brachiaria spp. O gênero Azospirillum. Locais de implantação dos experimentos. Sítio de Goiás. Sítio da Bahia. Isolamento, caracterização e quantificação de bactérias diazotróficas. Análise estatística. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. Isolamento e caracterização. Coletas exploratórias (pré-experimentais). Quantificação de Azospirillum spp. associados as raízes de Brachiaria (NMP). Sítio experimental de Goiás. Sítio experimental da Bahia. Atividade da nitrogenase. Produção de hormônio de crescimento (AIA - ácido indol acético) por isolados de A. amazonense. The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in association with these forage grasses were mainly species from the Azospiri!lum genus. The associations between these microrganisms and the plants are genera!ly conditioned to the vegetation, therefore is possible that different genotypes of Brachiaria exercise a selective effect on the populations of these, what could result in different BNF contributions. It was objectified to establish the influence of the Brachiaria species, pasture management and seasonal variations on the bacteria populations from the Azospiri!lum genus associated with the roots of these plants. Different pastures (B. humidicola, B. decumbens and B. brizan!ha) were implanted in areas of the Cerrado ecosystem and of the Atlantic Forest. Two management systems with different stocking rates (higher and lower) were evaluated. The co!lects of plant samples from each experimental treatment were accomplished in different times of the year. For the isolation and quantification of the diazotrophic bacteria traditional techniques were utilised with the use of semi-specific and semi-solid culture media without nitrogen. A. lipoferum, A. brasilense and A. amazonense were isolated from root samples of the three analysed Brachiaria species. The estimates of the bacterial populations from these species varied from 1 Q3 -107 ce!ls. 9 of roots-l. In the samples of the Cerrado ecosystem, the co!lect time presented significant effects on the population of these bacteria. The data from the Atlantic forest region experiment showed that plants of Brachiaria from different species and pastures under different stocking rates can present different populations numbers of Azospiri!lum spp. associated to its roots. Index terms: Azospiri!lum amazonense, biological nitrogen fixation, pastures degradation.
650 $aAzospirillum amazonense
650 $adegradation
650 $amicrobiology
650 $anitrogen fixation
650 $apastures
650 $asoil
650 $aBactéria
650 $aBrachiaria
650 $aCrescimento
650 $aFixação de Nitrogênio
650 $aMicrobiologia do Solo
650 $aPastagem
653 $aBactéira diazotrófica
653 $aBiological nitrogen fixation
653 $aBNF
653 $aBraquiária
653 $aDegredação
653 $aDiazotrophy bacteria
653 $aFBN
653 $aFixação biológica de nitrogênio
653 $aGrowth
700 1 $aTEIXEIRA, K. R. dos S.
700 1 $aURQUIAGA, S.
700 1 $aREIS, V. M.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
03/12/2019 |
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Data da última atualização: |
03/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
ARAÚJO, E. F.; GIBSON, E. L.; SANTOS, A. R. dos; GONÇALVES, E. de O.; WENDLING, I.; ALEXANDRE, R. S.; PAOLA, L. A. V. |
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Afiliação: |
Emanuel França Araújo, Universidade Federal do Espírito Santo; Elbya Leão Gibson, Universidade Federal do Espírito Santo; Aline Ramalho dos Santos, Universidade Federal do espírito Santo; Elzimar de Oliveira Gonçalves, Universidade Federal do Espírito Santo; IVAR WENDLING, CNPF; Rodrigo Sobreira Alexandre, Universidade Federal do Espírito Santo; Lunalda Aparecida Vaz Pola, Universidade Federal do Espírito Santo. |
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Título: |
Mini-cutting technique for vegetative propagation of Paratecoma peroba. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Cerne, v. 25, n. 3, p. 314-325, 2019. |
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Idioma: |
Inglês |
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Conteúdo: |
Paratecoma peroba is a native Brazilian forest species of great economic and ecological interest, which is currently at risk of extinction owing to excessive wood exploration. The use of the mini-cutting technique could facilitate the vegetatively propagation of this species. The objective of the present study was to establish a vegetative propagation protocol for P. peroba using the mini-cutting technique. In the first experiment, were tested five concentrations of indolbutiric acid (IBA; 0, 1, 2, 4 and 8 g.L-1) and two types of substrates (sand and a commercial substrate based on ground Pinus bark, coconut powder, and mineral additives). In the second experiment, were tested three types of mini-cuttings (apical of 6 cm and 10 cm, and intermediary of 4 cm) and two leaf area sizes (total leaf area and reduced to 50% of leaf area). The results showed that P. peroba could be vegetatively propagated using the mini-cutting technique with up to 82.5% rooting. There was only 5.6% of mini-cutting rooted in sand. High concentrations of IBA promotes decrease in rooting and number of roots. The 10 cm apical mini-cuttiing tend to form clones with better quality standards. The maintenance of the leaf area promotes the attainment of roots with greater root surface area, volume and dry mass of P. Peroba plants.v.25 n.3 2019 |
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Palavras-Chave: |
Adventitious rooting; Clonal forestry; Foliar architecture; Indole-3-butyric acid; Mini-cut type; Paratecoma peroba. |
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Thesagro: |
Espécie Nativa; Propagação Vegetativa. |
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Thesaurus NAL: |
Vegetative propagation. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/206008/1/2019-Ivar-Cerne-mini-cutting.pdf
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Marc: |
LEADER 02200naa a2200301 a 4500
001 2115767
005 2019-12-03
008 2019 bl uuuu u00u1 u #d
100 1 $aARAÚJO, E. F.
245 $aMini-cutting technique for vegetative propagation of Paratecoma peroba.$h[electronic resource]
260 $c2019
520 $aParatecoma peroba is a native Brazilian forest species of great economic and ecological interest, which is currently at risk of extinction owing to excessive wood exploration. The use of the mini-cutting technique could facilitate the vegetatively propagation of this species. The objective of the present study was to establish a vegetative propagation protocol for P. peroba using the mini-cutting technique. In the first experiment, were tested five concentrations of indolbutiric acid (IBA; 0, 1, 2, 4 and 8 g.L-1) and two types of substrates (sand and a commercial substrate based on ground Pinus bark, coconut powder, and mineral additives). In the second experiment, were tested three types of mini-cuttings (apical of 6 cm and 10 cm, and intermediary of 4 cm) and two leaf area sizes (total leaf area and reduced to 50% of leaf area). The results showed that P. peroba could be vegetatively propagated using the mini-cutting technique with up to 82.5% rooting. There was only 5.6% of mini-cutting rooted in sand. High concentrations of IBA promotes decrease in rooting and number of roots. The 10 cm apical mini-cuttiing tend to form clones with better quality standards. The maintenance of the leaf area promotes the attainment of roots with greater root surface area, volume and dry mass of P. Peroba plants.v.25 n.3 2019
650 $aVegetative propagation
650 $aEspécie Nativa
650 $aPropagação Vegetativa
653 $aAdventitious rooting
653 $aClonal forestry
653 $aFoliar architecture
653 $aIndole-3-butyric acid
653 $aMini-cut type
653 $aParatecoma peroba
700 1 $aGIBSON, E. L.
700 1 $aSANTOS, A. R. dos
700 1 $aGONÇALVES, E. de O.
700 1 $aWENDLING, I.
700 1 $aALEXANDRE, R. S.
700 1 $aPAOLA, L. A. V.
773 $tCerne$gv. 25, n. 3, p. 314-325, 2019.
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