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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
22/12/2005 |
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Data da última atualização: |
22/12/2005 |
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Autoria: |
HUNGRIA, M.; MENNA, P.; GERMANO, M. G.; CHUEIRE, L. M. O.; BANGEL, E. V.; CAMPO, R. J. |
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Título: |
Diversity of a Brazilian collection of rhizobial strains. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: WANG, Y. P.; LIN, M.; TIAN, Z. X.; ELMERICH, C.; NEWTON. W. E. (Ed). Biological nitrogen fixation, sustainable agriculture and the environment. Dordrecht: Springer, 2005. p. 413. |
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Idioma: |
Inglês |
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Notas: |
Proceedingsof the 14th International Nitrogen Fixation Congress. |
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Conteúdo: |
The Leguminosae is one of the largest plant families with over 18,000 species classified into around 650 genera: most are capable of effective symbioses with rhizobial strains. Howerver, despite reports of high strain diversity, especially in the tropics, there are less than 40 described rhizobial species. Ribosomal sequences, emphasinzing 16S rRNA gene ( 1.5 kb), are the method of choice for tracing bacteria phylogenies. Speciation of genera can be enhanced by analaysis of other ribosomal genes because both the 23S rRNA ( 2.3 kb) and the 16S-23S rRNA intergenic space (ITS) show higher variability than 16S rRNA. Analyses of rhizobial ribosomal genes have used RFLP-PCR, as well as partial or complete sequencing of bases. In Brazil, there are 200 rhizobial strains recommended for 95 legume species, but little is known of their genetic diversity. A Brazilian culture collection of 119 strains of Bradyrhizobium, isolated from thirty-three legume species, representing nine tribes and all three subfamilies, were analyzed by RFLP-PCR of the 16S rRNA, 23S rRNA and ITS region, each with three restriction enzymes. 43 of those atrains are recommended in Brazil as the most effective for 31 host legumes. For the 16S rRNA gene, reference strains of B. japonicum fit into two major clusters at 50% similarity, whereas two other cluster (at 53% similarity) were composed of strains of B. elkanii; all strains were joined at a final level of similarity of 28%. The higher variability in the ITS and 23rRNA resulted in final grouping at very low level of similarities, 27% and 16% respectively. Considering the three ribosomal regions, two great groups were visualized, related to B. japonicum (with most strains from soybean) and B. elkanii (most strains from indigenous legumes), at similarity levels of 54 and 46%, respectively, and at least two new clusters that might represent new species. The complete 16S rRNA sequence for another set of 80 rhizobial strains from 30 different legume species (23 recommended as most effective) were clustered within the genera Rhizobium, Sinorhizobium, Mesorhizobium and Bradyrhizobium. Three strains, recommended for Clitoria fairchildian, Piptadenia gonoacantha and Ormosia nitida, were clustered with Burkholderia sp. strain TJ182. This collection of strains indicates an extremely high level of genetic diversity in the tropics. MenosThe Leguminosae is one of the largest plant families with over 18,000 species classified into around 650 genera: most are capable of effective symbioses with rhizobial strains. Howerver, despite reports of high strain diversity, especially in the tropics, there are less than 40 described rhizobial species. Ribosomal sequences, emphasinzing 16S rRNA gene ( 1.5 kb), are the method of choice for tracing bacteria phylogenies. Speciation of genera can be enhanced by analaysis of other ribosomal genes because both the 23S rRNA ( 2.3 kb) and the 16S-23S rRNA intergenic space (ITS) show higher variability than 16S rRNA. Analyses of rhizobial ribosomal genes have used RFLP-PCR, as well as partial or complete sequencing of bases. In Brazil, there are 200 rhizobial strains recommended for 95 legume species, but little is known of their genetic diversity. A Brazilian culture collection of 119 strains of Bradyrhizobium, isolated from thirty-three legume species, representing nine tribes and all three subfamilies, were analyzed by RFLP-PCR of the 16S rRNA, 23S rRNA and ITS region, each with three restriction enzymes. 43 of those atrains are recommended in Brazil as the most effective for 31 host legumes. For the 16S rRNA gene, reference strains of B. japonicum fit into two major clusters at 50% similarity, whereas two other cluster (at 53% similarity) were composed of strains of B. elkanii; all strains were joined at a final level of similarity of 28%. The higher variability in the ITS ... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 03068naa a2200193 a 4500
001 1468692
005 2005-12-22
008 2005 bl --- 0-- u #d
100 1 $aHUNGRIA, M.
245 $aDiversity of a Brazilian collection of rhizobial strains.
260 $c2005
500 $aProceedingsof the 14th International Nitrogen Fixation Congress.
520 $aThe Leguminosae is one of the largest plant families with over 18,000 species classified into around 650 genera: most are capable of effective symbioses with rhizobial strains. Howerver, despite reports of high strain diversity, especially in the tropics, there are less than 40 described rhizobial species. Ribosomal sequences, emphasinzing 16S rRNA gene ( 1.5 kb), are the method of choice for tracing bacteria phylogenies. Speciation of genera can be enhanced by analaysis of other ribosomal genes because both the 23S rRNA ( 2.3 kb) and the 16S-23S rRNA intergenic space (ITS) show higher variability than 16S rRNA. Analyses of rhizobial ribosomal genes have used RFLP-PCR, as well as partial or complete sequencing of bases. In Brazil, there are 200 rhizobial strains recommended for 95 legume species, but little is known of their genetic diversity. A Brazilian culture collection of 119 strains of Bradyrhizobium, isolated from thirty-three legume species, representing nine tribes and all three subfamilies, were analyzed by RFLP-PCR of the 16S rRNA, 23S rRNA and ITS region, each with three restriction enzymes. 43 of those atrains are recommended in Brazil as the most effective for 31 host legumes. For the 16S rRNA gene, reference strains of B. japonicum fit into two major clusters at 50% similarity, whereas two other cluster (at 53% similarity) were composed of strains of B. elkanii; all strains were joined at a final level of similarity of 28%. The higher variability in the ITS and 23rRNA resulted in final grouping at very low level of similarities, 27% and 16% respectively. Considering the three ribosomal regions, two great groups were visualized, related to B. japonicum (with most strains from soybean) and B. elkanii (most strains from indigenous legumes), at similarity levels of 54 and 46%, respectively, and at least two new clusters that might represent new species. The complete 16S rRNA sequence for another set of 80 rhizobial strains from 30 different legume species (23 recommended as most effective) were clustered within the genera Rhizobium, Sinorhizobium, Mesorhizobium and Bradyrhizobium. Three strains, recommended for Clitoria fairchildian, Piptadenia gonoacantha and Ormosia nitida, were clustered with Burkholderia sp. strain TJ182. This collection of strains indicates an extremely high level of genetic diversity in the tropics.
700 1 $aMENNA, P.
700 1 $aGERMANO, M. G.
700 1 $aCHUEIRE, L. M. O.
700 1 $aBANGEL, E. V.
700 1 $aCAMPO, R. J.
773 $tIn: WANG, Y. P.; LIN, M.; TIAN, Z. X.; ELMERICH, C.; NEWTON. W. E. (Ed). Biological nitrogen fixation, sustainable agriculture and the environment. Dordrecht: Springer, 2005. p. 413.
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Registro original: |
Embrapa Soja (CNPSO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
23/08/2022 |
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Data da última atualização: |
17/05/2023 |
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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: |
LIMA, M. D. R.; MORAES, L. G.; SILVA, R. de C. C.; BARROS JUNIOR, U. de O.; BUFALINO, L.; SOARES, A. A. V.; ASSIS-PEREIRA, G.; GONÇALVES, D. de A.; TOMAZELLO-FILHO, M.; PROTÁSIO, T. de P. |
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Afiliação: |
MICHAEL DOUGLAS ROQUE LIMA, UNIVERSIDADE FEDERAL DE LAVRAS; LARISSA GONÇALVES MORAES, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; RITA DE CÁSSIA CARVALHO SILVA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; UDSON DE OLIVEIRA BARROS JUNIOR, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; LINA BUFALINO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; ALVARO AUGUSTO VIEIRA SOARES, UNIVERSIDADE FEDERAL DE UBERLÂNDIA; GABRIEL ASSIS-PEREIRA, ESCOLA SUPERIOR DE AGRICULTURA "LUIZ DE QUEIROZ"; DELMAN DE ALMEIDA GONCALVES, CPATU; MARIO TOMAZELLO-FILHO, ESCOLA SUPERIOR DE AGRICULTURA "LUIZ DE QUEIROZ"; THIAGO DE PAULA PROTÁSIO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA. |
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Título: |
Tachigali vulgaris energy forests: understanding spacing, age, and stem type effects on tree growth patterns and wood density. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
New Forests, v. 54, n. 3, p. 491-513, 2023. |
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DOI: |
https://doi.org/10.1007/s11056-022-09932-y |
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Idioma: |
Inglês |
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Conteúdo: |
Reforestation with species of the Eucalyptus genus provides the main biomass source for energy purposes in Brazil. However, the country?s northern region lacks such crops to meet the demand of the second-largest national steel pole. The species is a promising source of biomass, as it is native to the region and grows at high rates. Thus, this research aimed to evaluate the effect of planting spacing (4.5, 6.0, 7.5, 9.0, 10.5, and 12 m2 per plant), tree age (87 and 102 months) and stem forking on dendrometric variables and wood basic density of T. vulgaris trees from a trial plantation located in Eastern Amazonia. The commercial volume, basic density, form factor, and dry wood mass of trees were determined. The forked trees had a higher volume (0.2492 m3) and dry wood mass (112.88 kg) than non-forked trees (average volume of 0.1573 m3 and 73.66 kg of dry wood mass). At 87 months, wood basic density was found higher in wide spacings (9 and 12 m2 plant1). At 87 months, the non-forked and forked trees presented basic densities of 0.505 and 0.474 g cm3, respectively. The forked trees at 102 months spaced by 9 m2 had a basic density>0.500 g cm3, a desirable parameter for charcoal production. Thus, this study confirmed the relevance of planting spacing, age, and stem type on the basic density of T. vulgaris, supporting future studies to define the best silvicultural practices and decision-making on the species by forest companies located in Amazonia. |
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Palavras-Chave: |
Triplaris surinamensis. |
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Thesagro: |
Crescimento; Densidade de Plantio; Espaçamento; Madeira; Qualidade. |
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Thesaurus NAL: |
Wood quality. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02472naa a2200325 a 4500
001 2145683
005 2023-05-17
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11056-022-09932-y$2DOI
100 1 $aLIMA, M. D. R.
245 $aTachigali vulgaris energy forests$bunderstanding spacing, age, and stem type effects on tree growth patterns and wood density.$h[electronic resource]
260 $c2023
520 $aReforestation with species of the Eucalyptus genus provides the main biomass source for energy purposes in Brazil. However, the country?s northern region lacks such crops to meet the demand of the second-largest national steel pole. The species is a promising source of biomass, as it is native to the region and grows at high rates. Thus, this research aimed to evaluate the effect of planting spacing (4.5, 6.0, 7.5, 9.0, 10.5, and 12 m2 per plant), tree age (87 and 102 months) and stem forking on dendrometric variables and wood basic density of T. vulgaris trees from a trial plantation located in Eastern Amazonia. The commercial volume, basic density, form factor, and dry wood mass of trees were determined. The forked trees had a higher volume (0.2492 m3) and dry wood mass (112.88 kg) than non-forked trees (average volume of 0.1573 m3 and 73.66 kg of dry wood mass). At 87 months, wood basic density was found higher in wide spacings (9 and 12 m2 plant1). At 87 months, the non-forked and forked trees presented basic densities of 0.505 and 0.474 g cm3, respectively. The forked trees at 102 months spaced by 9 m2 had a basic density>0.500 g cm3, a desirable parameter for charcoal production. Thus, this study confirmed the relevance of planting spacing, age, and stem type on the basic density of T. vulgaris, supporting future studies to define the best silvicultural practices and decision-making on the species by forest companies located in Amazonia.
650 $aWood quality
650 $aCrescimento
650 $aDensidade de Plantio
650 $aEspaçamento
650 $aMadeira
650 $aQualidade
653 $aTriplaris surinamensis
700 1 $aMORAES, L. G.
700 1 $aSILVA, R. de C. C.
700 1 $aBARROS JUNIOR, U. de O.
700 1 $aBUFALINO, L.
700 1 $aSOARES, A. A. V.
700 1 $aASSIS-PEREIRA, G.
700 1 $aGONÇALVES, D. de A.
700 1 $aTOMAZELLO-FILHO, M.
700 1 $aPROTÁSIO, T. de P.
773 $tNew Forests$gv. 54, n. 3, p. 491-513, 2023.
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