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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
02/08/2010 |
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Data da última atualização: |
02/08/2010 |
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Autoria: |
SALTON, J. C. |
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Título: |
Relações entre sistemas de preparo, temperatura e umidade do solo. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
1991. |
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Páginas: |
92 f. |
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Idioma: |
Português |
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Notas: |
Dissertação (Mestrado em Agronomia) - Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre. |
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Conteúdo: |
Temperatura do solo; Propriedades térmicas do solo; Efeitos da cobertura e os processos biológicos no solo; Água no solo e sua evaporação; Localização e caracterização da área experimental; Histórico da área experimental; Tratamentos e delineamento experimental; Procedimento experimental; Temperatura do solo, umidade do solo, curva característica de retenção de água no solo, densidade e porosidade do solo, capacidade calorífica do solo, cobertura do solo, dados meteorológicos, tratamento estatístico. |
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Thesagro: |
Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00986nam a2200145 a 4500
001 1858953
005 2010-08-02
008 1991 bl uuuu m 00u1 u #d
100 1 $aSALTON, J. C.
245 $aRelações entre sistemas de preparo, temperatura e umidade do solo.
260 $a1991.$c1991
300 $a92 f.
500 $aDissertação (Mestrado em Agronomia) - Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre.
520 $aTemperatura do solo; Propriedades térmicas do solo; Efeitos da cobertura e os processos biológicos no solo; Água no solo e sua evaporação; Localização e caracterização da área experimental; Histórico da área experimental; Tratamentos e delineamento experimental; Procedimento experimental; Temperatura do solo, umidade do solo, curva característica de retenção de água no solo, densidade e porosidade do solo, capacidade calorífica do solo, cobertura do solo, dados meteorológicos, tratamento estatístico.
650 $aSolo
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
18/12/2023 |
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Data da última atualização: |
18/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 4 |
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Autoria: |
LEONARDO-SILVA, L.; SILVA, L. B. da; FERREIRA, E. P. de B.; REIS, K. F. D. N. S. dos; NAVES, P. L. F.; MARTIN-DIDONET, C. C. G. |
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Afiliação: |
LUCAS LEONARDO-SILVA, UEG; LARISSA B. DA SILVA, UEG; ENDERSON PETRONIO DE BRITO FERREIRA, CNPAF; KARINA F. D. N. S. DOS REIS, UEG; PLINIO L. F. NAVES, UEG; CLAUDIA C. G. MARTIN-DIDONET, UEG. |
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Título: |
Assessment of morphophysiological and genotypic diversity of endophytic bacteria isolated from rice (Oryza sativa L.) plants. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Revista Caatinga, v. 36, n. 4, p. 775-784, out./dez. 2023. |
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ISSN: |
1983-2125 |
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Idioma: |
Português |
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Conteúdo: |
Rice production in Brazil incurs high costs due to the significant use of agrochemicals. Some plant growth-promoting rhizobacteria (PGPR) can be used as alternative to fertilizers and phytosanitary products. Thus, the objective of this study was to characterize endophytic bacteria isolated from roots of rice plants. The isolates were characterized based on colony morphology, antibiotic resistance, carbon sources utilization, enzyme activity (catalase, amylase, protease, cellulase, and lipase), inorganic phosphate solubilization, and the 16S-23S rDNA intergenic region. Morphologically, 68% of the isolates presented a rapid growth rate, 46% presented abundant mucus production, and 77% formed viscous colonies. All isolates were resistant to nalidixic acid and 16% presented resistance to streptomycin. The majority (90%) used monosaccharides and disaccharides in carbon source assays. Most of the isolates (95%) were positive for catalase and 63.6% were positive for amylase, protease, lipase, and cellulase activities. Additionally, 59% of them were able to solubilize phosphate. The mean enzymatic index for amylase, cellulase, and protease was 2.8, 3.5, and 1.7 respectively. The similarity analysis revealed high diversity among the isolates, with similarity indices of 70% (based on morphological characteristics) and 60% (based on the intergenic region 16S-23S rDNA). Considering morphophysiological and genotypic characteristics, three promising isolates should be evaluated in studies under field conditions for the potential development of bioproducts to replace industrially manufactured inputs in rice crops. MenosRice production in Brazil incurs high costs due to the significant use of agrochemicals. Some plant growth-promoting rhizobacteria (PGPR) can be used as alternative to fertilizers and phytosanitary products. Thus, the objective of this study was to characterize endophytic bacteria isolated from roots of rice plants. The isolates were characterized based on colony morphology, antibiotic resistance, carbon sources utilization, enzyme activity (catalase, amylase, protease, cellulase, and lipase), inorganic phosphate solubilization, and the 16S-23S rDNA intergenic region. Morphologically, 68% of the isolates presented a rapid growth rate, 46% presented abundant mucus production, and 77% formed viscous colonies. All isolates were resistant to nalidixic acid and 16% presented resistance to streptomycin. The majority (90%) used monosaccharides and disaccharides in carbon source assays. Most of the isolates (95%) were positive for catalase and 63.6% were positive for amylase, protease, lipase, and cellulase activities. Additionally, 59% of them were able to solubilize phosphate. The mean enzymatic index for amylase, cellulase, and protease was 2.8, 3.5, and 1.7 respectively. The similarity analysis revealed high diversity among the isolates, with similarity indices of 70% (based on morphological characteristics) and 60% (based on the intergenic region 16S-23S rDNA). Considering morphophysiological and genotypic characteristics, three promising isolates should be evaluated in studies... Mostrar Tudo |
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Palavras-Chave: |
Extracellular enzymes; OCR 16S-23S; RDNA. |
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Thesagro: |
Arroz; Bactéria; Enzima; Fator de Crescimento; Oryza Sativa. |
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Thesaurus NAL: |
Genotype; Plant growth-promoting rhizobacteria; Rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159886/1/rev-caatinga-2023.pdf
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Marc: |
LEADER 02594naa a2200325 a 4500
001 2159886
005 2023-12-18
008 2023 bl uuuu u00u1 u #d
022 $a1983-2125
100 1 $aLEONARDO-SILVA, L.
245 $aAssessment of morphophysiological and genotypic diversity of endophytic bacteria isolated from rice (Oryza sativa L.) plants.$h[electronic resource]
260 $c2023
520 $aRice production in Brazil incurs high costs due to the significant use of agrochemicals. Some plant growth-promoting rhizobacteria (PGPR) can be used as alternative to fertilizers and phytosanitary products. Thus, the objective of this study was to characterize endophytic bacteria isolated from roots of rice plants. The isolates were characterized based on colony morphology, antibiotic resistance, carbon sources utilization, enzyme activity (catalase, amylase, protease, cellulase, and lipase), inorganic phosphate solubilization, and the 16S-23S rDNA intergenic region. Morphologically, 68% of the isolates presented a rapid growth rate, 46% presented abundant mucus production, and 77% formed viscous colonies. All isolates were resistant to nalidixic acid and 16% presented resistance to streptomycin. The majority (90%) used monosaccharides and disaccharides in carbon source assays. Most of the isolates (95%) were positive for catalase and 63.6% were positive for amylase, protease, lipase, and cellulase activities. Additionally, 59% of them were able to solubilize phosphate. The mean enzymatic index for amylase, cellulase, and protease was 2.8, 3.5, and 1.7 respectively. The similarity analysis revealed high diversity among the isolates, with similarity indices of 70% (based on morphological characteristics) and 60% (based on the intergenic region 16S-23S rDNA). Considering morphophysiological and genotypic characteristics, three promising isolates should be evaluated in studies under field conditions for the potential development of bioproducts to replace industrially manufactured inputs in rice crops.
650 $aGenotype
650 $aPlant growth-promoting rhizobacteria
650 $aRice
650 $aArroz
650 $aBactéria
650 $aEnzima
650 $aFator de Crescimento
650 $aOryza Sativa
653 $aExtracellular enzymes
653 $aOCR 16S-23S
653 $aRDNA
700 1 $aSILVA, L. B. da
700 1 $aFERREIRA, E. P. de B.
700 1 $aREIS, K. F. D. N. S. dos
700 1 $aNAVES, P. L. F.
700 1 $aMARTIN-DIDONET, C. C. G.
773 $tRevista Caatinga$gv. 36, n. 4, p. 775-784, out./dez. 2023.
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Embrapa Arroz e Feijão (CNPAF) |
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