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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
22/06/2020 |
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Data da última atualização: |
01/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SENA, P. T. S.; NASCIMENTO, T. R. do; LINO, J. de O. S.; OLIVEIRA, G. S.; FERREIRA NETO, R. A.; FREITAS, A. D. S. de; FERNANDES JUNIOR, P. I.; MARTINS, L. M. V. |
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Afiliação: |
Pâmella Thalita Souza Sena; Tailane Ribeiro do Nascimento; Jaynne de Oliveira Siqueira Lino; Gilmar Silva Oliveira; Reginaldo Alves Ferreira Neto; Ana Dolores Santiago de Freitas; PAULO IVAN FERNANDES JUNIOR, CPATSA; Lindete Míria Vieira Martins. |
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Título: |
Molecular, physiological, and symbiotic characterization of cowpea rhizobia from soils under different agricultural systems in the Semiarid region of Brazil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Journal of Soil Science and Plant Nutrition, v, 20, n. 3, p. 1178-1192, 2020. |
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DOI: |
https://doi.org/10.1007/s42729-020-00203-3 |
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Idioma: |
Inglês |
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Conteúdo: |
The objectives of this study were to characterize the genetic diversity and evaluate the ability to tolerate stress as well as to assess the symbiotic efficiency of bacteria from cowpea nodules in agricultural soils with different uses in the semiarid region of Bahia state (Brazil). Soil samples were collected from six crop lands and one from the pristine Caatinga biome. After a trap-host experiment, the bacteria were isolated and culturally characterized. Isolates with typical characteristics of Bradyrhizobium were subjected to the nodC symbiotic gene amplification and those positive were evaluated by 16S-23S IGS-RFLP. Twenty-seven isolates belonging to different genetic clusters were selected for 16S-23S IGS sequencing. In additions, the selected bacteria were characterized biochemically and symbiotically. Among 420 characterized isolates, approximately 60% (251 isolates) displayed typical Bradyrhizobium cultural features. A total of 161, out of 251 isolates, showed positive amplification of the nodC gene fragment. The IGS-RFLP profiles analysis generated 33 groups and 27 were selected for further analysis. The fertility of the soils influenced the distribution of the isolates in the IGS-RFLP clusters. The bacteria were assigned to two genera, Bradyrhizobium and Microvirga, with 26 and 1 representative bacteria, respectively. Some isolates were able to tolerate NaCl as well as acidic and alkaline pH. In addition, isolates showed the abilities to produce biofilm under stress and to produce indole compounds, as well as efficient nodulation and nitrogen fixation. The isolates displayed great genetic, biochemical, and symbiotic variability with promising biotechnological potential. MenosThe objectives of this study were to characterize the genetic diversity and evaluate the ability to tolerate stress as well as to assess the symbiotic efficiency of bacteria from cowpea nodules in agricultural soils with different uses in the semiarid region of Bahia state (Brazil). Soil samples were collected from six crop lands and one from the pristine Caatinga biome. After a trap-host experiment, the bacteria were isolated and culturally characterized. Isolates with typical characteristics of Bradyrhizobium were subjected to the nodC symbiotic gene amplification and those positive were evaluated by 16S-23S IGS-RFLP. Twenty-seven isolates belonging to different genetic clusters were selected for 16S-23S IGS sequencing. In additions, the selected bacteria were characterized biochemically and symbiotically. Among 420 characterized isolates, approximately 60% (251 isolates) displayed typical Bradyrhizobium cultural features. A total of 161, out of 251 isolates, showed positive amplification of the nodC gene fragment. The IGS-RFLP profiles analysis generated 33 groups and 27 were selected for further analysis. The fertility of the soils influenced the distribution of the isolates in the IGS-RFLP clusters. The bacteria were assigned to two genera, Bradyrhizobium and Microvirga, with 26 and 1 representative bacteria, respectively. Some isolates were able to tolerate NaCl as well as acidic and alkaline pH. In addition, isolates showed the abilities to produce biofilm under stres... Mostrar Tudo |
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Palavras-Chave: |
Diversidade genética; Fixação biológica de nitrogênio; Microvirga; Semiárido. |
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Thesagro: |
Feijão; Inoculante. |
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Thesaurus Nal: |
Bradyrhizobium. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02731naa a2200301 a 4500
001 2123416
005 2021-10-01
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s42729-020-00203-3$2DOI
100 1 $aSENA, P. T. S.
245 $aMolecular, physiological, and symbiotic characterization of cowpea rhizobia from soils under different agricultural systems in the Semiarid region of Brazil.$h[electronic resource]
260 $c2020
520 $aThe objectives of this study were to characterize the genetic diversity and evaluate the ability to tolerate stress as well as to assess the symbiotic efficiency of bacteria from cowpea nodules in agricultural soils with different uses in the semiarid region of Bahia state (Brazil). Soil samples were collected from six crop lands and one from the pristine Caatinga biome. After a trap-host experiment, the bacteria were isolated and culturally characterized. Isolates with typical characteristics of Bradyrhizobium were subjected to the nodC symbiotic gene amplification and those positive were evaluated by 16S-23S IGS-RFLP. Twenty-seven isolates belonging to different genetic clusters were selected for 16S-23S IGS sequencing. In additions, the selected bacteria were characterized biochemically and symbiotically. Among 420 characterized isolates, approximately 60% (251 isolates) displayed typical Bradyrhizobium cultural features. A total of 161, out of 251 isolates, showed positive amplification of the nodC gene fragment. The IGS-RFLP profiles analysis generated 33 groups and 27 were selected for further analysis. The fertility of the soils influenced the distribution of the isolates in the IGS-RFLP clusters. The bacteria were assigned to two genera, Bradyrhizobium and Microvirga, with 26 and 1 representative bacteria, respectively. Some isolates were able to tolerate NaCl as well as acidic and alkaline pH. In addition, isolates showed the abilities to produce biofilm under stress and to produce indole compounds, as well as efficient nodulation and nitrogen fixation. The isolates displayed great genetic, biochemical, and symbiotic variability with promising biotechnological potential.
650 $aBradyrhizobium
650 $aFeijão
650 $aInoculante
653 $aDiversidade genética
653 $aFixação biológica de nitrogênio
653 $aMicrovirga
653 $aSemiárido
700 1 $aNASCIMENTO, T. R. do
700 1 $aLINO, J. de O. S.
700 1 $aOLIVEIRA, G. S.
700 1 $aFERREIRA NETO, R. A.
700 1 $aFREITAS, A. D. S. de
700 1 $aFERNANDES JUNIOR, P. I.
700 1 $aMARTINS, L. M. V.
773 $tJournal of Soil Science and Plant Nutrition, v, 20$gn. 3, p. 1178-1192, 2020.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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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 Meio-Norte. |
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Data corrente: |
19/11/2008 |
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Data da última atualização: |
02/10/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
MASCHIO, R.; ANDRADE JÚNIOR, A. S.; MOTA, P. R. D.; MELO, F. B. |
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Afiliação: |
Rafael Maschio, UFPI; Aderson Soares de Andrade Júnior, Embrapa Meio-Norte; Poliana R. D. Mota, Fapepi/CNPq; Francisco de Brito Melo, Embrapa Meio-Norte. |
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Título: |
Physical properties and soil degration index in the "Plateau of Guadalupe irrigation district", Piauí state, Brazil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM, 8., 2008, Iguassu Falls. Technology for all: sharing the knowledge for development: proceedings. [Foz do Iguaçu]: CIGR, 2008. |
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Páginas: |
4 p. |
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Idioma: |
Inglês |
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Conteúdo: |
The management of water and soil is an important aspect of sustainable agricultural production. Knowledge of the physical properties of the soil is essential for the characterization of the soil-water-plant interactions and also for the establishment of irrigation management, in accordance with soil and crop requirements. The objective of this study was to evaluate the physical properties i.e. that pertain to water content, granulometry, bulk density, along with the water retention curve and soil physical degradation index of the "Plateaus of Guadalupe Irrigation District", Piaui State, Brazil. Undisturbed and disturbed soil samples were collected in plots, randomly chosen, as well as in areas of initial preparation, at depths of 0 to 0.2 m and 0.2 to 0.4 m. The water retention curves were molded with suction pressure of -6, -10, -30, -100, -300, -500 and -1500 kPa and adjusted by the Genucthen model. There was an increase in clay levels of the soil depth. The bulk density showed lower values in the areas of initial preparation. The average available soil water was higher in the layer 0 to 0.2 m. Three plots presented problems with the soil physical degradation index, but in general, the soil had good physical conditions for cultivation. |
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Palavras-Chave: |
Manejo de irrigação; Propriedade do solo. |
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Thesagro: |
Planejamento Agrícola. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/70311/1/265-08.pdf
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Marc: |
LEADER 02113nam a2200193 a 4500
001 1070311
005 2023-10-02
008 2008 bl uuuu u00u1 u #d
100 1 $aMASCHIO, R.
245 $aPhysical properties and soil degration index in the "Plateau of Guadalupe irrigation district", Piauí state, Brazil.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM, 8., 2008, Iguassu Falls. Technology for all: sharing the knowledge for development: proceedings. [Foz do Iguaçu]: CIGR$c2008
300 $a4 p.
520 $aThe management of water and soil is an important aspect of sustainable agricultural production. Knowledge of the physical properties of the soil is essential for the characterization of the soil-water-plant interactions and also for the establishment of irrigation management, in accordance with soil and crop requirements. The objective of this study was to evaluate the physical properties i.e. that pertain to water content, granulometry, bulk density, along with the water retention curve and soil physical degradation index of the "Plateaus of Guadalupe Irrigation District", Piaui State, Brazil. Undisturbed and disturbed soil samples were collected in plots, randomly chosen, as well as in areas of initial preparation, at depths of 0 to 0.2 m and 0.2 to 0.4 m. The water retention curves were molded with suction pressure of -6, -10, -30, -100, -300, -500 and -1500 kPa and adjusted by the Genucthen model. There was an increase in clay levels of the soil depth. The bulk density showed lower values in the areas of initial preparation. The average available soil water was higher in the layer 0 to 0.2 m. Three plots presented problems with the soil physical degradation index, but in general, the soil had good physical conditions for cultivation.
650 $aPlanejamento Agrícola
653 $aManejo de irrigação
653 $aPropriedade do solo
700 1 $aANDRADE JÚNIOR, A. S.
700 1 $aMOTA, P. R. D.
700 1 $aMELO, F. B.
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Embrapa Meio-Norte (CPAMN) |
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