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Registros recuperados: 22
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Acute toxicity and enzymatic alterations of Daphnia similis exposed to 4-chloroaniline. Repositório Alice
DANTZGER, D. D.; LEME, C. W.; ANJOS, E. F.; JONSSON, C. M.; AOYAMA, H..
2012
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: 4-chloroaniline; Acid phosphatase; Daphnia similis; Catalase.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/956385
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Arbuscular mycorrhizal fungus in microbial activity and aggregation of a Cerrado Oxisol in crop sequence Ciência e Agrotecnologia
Vilela,Laíze Aparecida Ferreira; Saggin Júnior,Orivaldo José; Paulino,Helder Barbosa; Siqueira,José Oswaldo; Santos,Vera Lúcia da Silva; Carneiro,Marco Aurélio Carbone.
Soil structure has major influence on ecosystem sustainability and plant growth. Arbuscular mycorrhizal fungi (AMF) are an important functional group of soil microbiota, acting in the process of aggregation, especially in agroecosystems and related to the production and plant diversity. AMF are widely distributed in tropical agroecosystems and are extremely important for development of many agricultural crops. The present study evaluated the effect of inoculation with Glomus macrocarpum in different crop sequences on plant growth, microbial activity and aggregation of a Cerrado Oxisol. The study was conducted in a completely randomized design in a4 x 4 factorial scheme. Treatments consisted of four conditions of elimination and/or introduction of AMF...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Acid phosphatase; Mean geometric diameter; Mean weight diameter; Soil structure.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100004
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Biomassa microbiana e atividade enzimatica em solos de Cerrado e sistemas agricolas anuais e perenes na regiao de Primavera do Leste/MT. Infoteca-e
MATSUOKA, M.; MENDES, I. de C.; LOUREIRO, M. de F..
2002
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Cerrado; Solo; Microbiologia do solo; Populacao microbiana; Biomassa; Carbono; Atividade enzimatica; Bioquimica do solo; Fosfatase acida; Soil; Soil biology; Biochemistry; Carbon; Enzimic activity; Microbial flora; Biomass; Acid phosphatase.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/559753
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Chemical, Biological, and Biochemical Parameters of the Soil P Cycle After Long-Term Pig Slurry Application in No-Tillage System Rev. Bras. Ciênc. Solo
Tiecher,Tales; Tiecher,Tadeu Luis; Mallmann,Fábio Joel Kochem; Zafar,Mohsin; Ceretta,Carlos Alberto; Lourenzi,Cledimar Rogério; Brunetto,Gustavo; Gatiboni,Luciano Colpo; Santos,Danilo Rheinheimer dos.
ABSTRACT In Southern Brazil, agricultural soils are often treated over long periods with annual pig slurry (PS) applications, and their influence on soil nutrient dynamics should be monitored. This study aimed to evaluate the P forms accumulated in the soil and some biological and biochemical parameters of the P cycle after 19 successive PS applications over eight years, in a no-tillage (NT) system. Pig slurry was applied at rates of 0, 20, 40, and 80 m3 ha-1 per crop. Several P forms (available P, microbial P, phosphatase enzyme, total organic and inorganic P) in the 0.00-0.05 and 0.05-0.10 m soil layers were analyzed. Increases up to 5,523 % in available P, 308 % in microbial P, 104 % in phosphatase enzyme activity, 91 % in organic P, 251 % in inorganic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Organic phosphorus; Inorganic phosphorus; Microbial biomass phosphorus; Acid phosphatase.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100428
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Cytochemical localization of acid phosphatase in Stigeoclonium tenue (Chaetophorales, Chlorophyceae) Biocell
Michetti,Karina M.; Leonardi,Patricia I.; Cáceres,Eduardo J..
Nonspecific acid phosphatases are a group of enzymes whose activity increases the availability of exogenous and endogenous orthophosphate either through extra- or intracellular hydrolysis of phosphate compounds. Our study demonstrates the activity of acid phosphatases in the filamentous freshwater alga Stigeoclonium tenue. These enzymes were detected following a cerium-based method in which cerium was used as an orthophosphate-capture reagent. In thalli from S. tenue from the natural environment, acid phosphatases were found in the longitudinal cell wall, plasmalemma, and vacuole. In thalli from Bold's Basal Medium culture, these enzymes were found mainly in the plasmalemma; they were scarce in the cell wall. In the thalli grown in phosphate-enriched...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chaetophorales; Acid phosphatase; Stigeoclonium tenue; Ultrastructure.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000300009
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Dissolving mechanism of strain P17 on insoluble phosphorus of yellow-brown soil BJM
Chuan-qing,Zhong; Guang-xiang,Cao; Wei-yi,Huang; Xing-she,Luan; Yi-fei,Yang.
Strain P17 was a bacterial strain identified as Bacillus megaterium isolated from ground accumulating phosphate rock powder. The fermentation broth of strain P17 and the yellow-brown soil from Nanjing Agricultural University garden were collected to conduct this study. The simulation of fixed insoluble phosphorous forms after applying calcium superphosphate into yellow-brown soil was performed in pots, while available P and total P of soil were extremely positive correlative with those of groundwater. Then the dissolving effect of strain P17 on insoluble P of yellow-brown soil was studied. Results showed that Bacillus megaterium strain P17 had notable solubilizing effect on insoluble phosphates formed when too much water-soluble phosphorous fertilizer...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calcium superphosphate; P-solubilizing microbes; Acid phosphatase; Alkaline phosphatase.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300025
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Effect of tillage systems and permanent groundcover intercropped with orange trees on soil enzyme activities BABT
Balota,Elcio Liborio; Machineski,Oswaldo; Truber,Priscila Viviane; Auler,Pedro Antonio Martins.
The objective of this study was to evaluate the effect of different soil tillage systems and groundcover crops intercropped with orange trees on soil enzyme activities. The experiment was performed in an Ultisol soil in northwestern Paraná State. Two soil tillage systems were evaluated [conventional tillage (CT) across the entire area and strip tillage (ST) with a 2-m strip width] in combination with various groundcover vegetation management systems. Soil samples were collected after five years of experimental management at a depth of 0-15 cm under the tree canopy and in the inter-row space in the following treatments: (1) CT-Calopogonium mucunoides; (2) CT-Arachis pintoi; (3) CT-Bahiagrass; (4) CT-Brachiaria humidicola; and (5) ST-B. humidicola. The soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arylsulfatase; Acid phosphatase; Tillage systems; Vegetative cover.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200001
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Enzyme activity and microbial biomass in an Oxisol amended with sewage sludge contaminated with nickel Scientia Agricola
Revoredo,Marcos Donizeti; Melo,Wanderley José de.
The role of nickel in soils of tropical areas under the application of sewage sludge is still not very well known. This study was carried out under greenhouse conditions in Jaboticabal, São Paulo State, Brazil, with the objective of evaluating the impact of the application of sewage sludge previously contaminated with rates of nickel (329, 502, 746 and 1119 mg kg-1, dry basis) on a soil cropped with sorghum, in relation to soil enzyme activity and soil microbial biomass. Soil samples were collected at the beginning and the end of the experiment. The experimental design was completely randomized, with five treatments (control and four rates of Ni in the sewage sludge) and four replications. C and N of the soil microbial biomass and enzyme activities (acid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Biosolid; Acid phosphatase; Alkaline phosphatase; Sorghum.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100009
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Enzyme activity, glomalin, and soil organic carbon in agroforestry systems. Repositório Alice
SILVA, C. F. da; PEREIRA, M. G.; GOMES, J. H. G.; MARCELO ANTONIOL FONTES; SILVA, E. M. R. da.
This study aimed to evaluate enzyme activity, glomalin-related soil proteins (GRSP), soil chemical attributes, and total organic carbon (TOC) in two Agroforestry systems (AFS) (AFS-1 and AFS-2), in a traditional agriculture area (TA), and secondary forest (SF) area in Paraty (RJ). Soil samples (from 0 to 5 cm depth) were collected during the rainy and dry seasons. AFS improves and/or maintains soil chemical indicators based on pH increase, reduces aluminum saturation and maintains soil nutrient content (Ca, Mg and K), when compared with SF. The contribution of organic material and the biodiversity of the AFS provide the maintenance of the total organic carbon content of the soil. AFS maintain the activity of the enzymes protease, ?-glucosidase, acid...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: B glucosidase; FDA; Protease; Acid phosphatase; Agroecology.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1124915
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Extracellular breakdown of collagen by mice decidual cells. A cytochemical and ultrastructural study Biocell
Godosevicius Katz,Sima.
The interaction of antimesometrial decidual cells and collagen fibrils was studied by light microscopy and ultrastructural cytochemistry in fed and acutely fasted mice on days 9-11 of pregnancy. Fibrillar elements in the extracellular space consisted of collagen fibrils and filamentous aggregates (disintegrating collagen fibrils). Intracellular vacuoles exhibited typical collagen immersed in electron-translucent material (clear vacuoles) and faint cross-banded collagen immersed in electron-opaque material (dark vacuoles). Fibrillar elements showed extracellular acid phosphatase activity which was stronger in the region of mature decidua than in predecidual cells region in all animals; it was conspicuous in mature decidua of fasted animals. Intracellular...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decidua; Acid phosphatase; Fasting; Electron microscopy; Mice.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000300003
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Fosfatase ácida e alcalina em solo sob manejo do sistema integração lavoura pecuária e floresta. Repositório Alice
MOREIRA, E. D. S.; MARRIEL, I. E.; SANTOS, C. A. dos; SOUSA, J. C. da C. de; GONTIJO NETO, M. M.; LANA, A. M. Q.; PAIVA, C. A. de O..
2016
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Sistemas integrados; Enzima; Fósforo; Acid phosphatase; Alkaline phosphatase; Urochloa brizantha.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1054902
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Indicadores biológicos associados ao ciclo do fósforo em solos de Cerrado sob plantio direto e plantio convencional. Repositório Alice
CARNEIRO, R.G.; MENDES, I. de C.; LOVATO, P.E.; CARVALHO, A.M. de; VIVALDI, L.J..
O objetivo deste trabalho foi avaliar a influência do plantio direto, do preparo convencional do solo e de plantas de cobertura sobre indicadores biológicos associados ao ciclo do fósforo (P). O trabalho foi realizado em três áreas adjacentes, num Latossolo Vermelho-Amarelo, distribuídas da seguinte maneira: área I, dois anos de experimentação, comparando esses sistemas de plantio; área II, seis anos de experimentação e área III, Cerrado nativo. Em julho/1998 e janeiro/1999, avaliaram-se: o P da biomassa, populações de fungos e bactérias totais e solubilizadores de fosfato e a atividade da fosfatase ácida, nas profundidades de 0-5 e de 5-20 cm. A atividade da fosfatase e a ocorrência de fungos e bactérias solubilizadoras nas áreas com plantio direto foram...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: P da biomassa microbiana; Fosfatase ácida; Microrganismos solubilizadores de fosfato; Culturas de cobertura; Microbial biomass P; Acid phosphatase; Phosphate solubilizing microorganisms; Cover crops.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/112186
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Indicadores biológicos associados ao ciclo do fósforo em solos de cerrado utilizando plantio direto e plantio convencional. Infoteca-e
CARNEIRO, R. G.; MENDES, I. de C.; LOVATO, P. E.; CARVALHO, A. M. de; VIVALDI, L. J..
RESUMO: O objetivo deste trabalho foi avaliar a influência do plantio direto, do preparo convencional do solo e de plantas de cobertura sobre indicadores biológicos associados ao ciclo do fósforo (P). O trabalho foi realizado em três áreas adjacentes, num Latossolo Vermelho-Amarelo, distribuídas da seguinte maneira: área I, dois anos de experimentação, comparando esses sistemas de plantio; área II, seis anos de experimentação e área III, Cerrado nativo. Em julho/1998 e janeiro/1999, avaliaram-se: o P da biomassa, populações de fungos e bactérias totais e solubilizadores de fosfato e a atividade da fosfatase ácida, nas profundidades de 0-5 e de 5-20 cm. A atividade da fosfatase e a ocorrência de fungos e bactérias solubilizadoras nas áreas com plantio...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Biologia do solo; Plantio direto; Plantio convencional; Cerrado; Biomassa; População microbiana; Fosfatase ácida; Planta de cobertura; Solubilização; Fosfato; Soil biology; Zero tillage; Conventional tillage; Biomass; Microbial flora; Acid phosphatase; Cover plants; Solubilizing; Phosphates.
Ano: 2004 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/569003
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Lowering of phytic acid content by enhancement of phytase and acid phosphatase activities during sunflower germination BABT
Agostini,Juliana da Silva; Nogueira,Rosicler Balduíno; Ida,Elza Iouko.
The objective of this work was to investigate the germination of hybrid sunflowers BRS191 and C11 as a means of lowering phytic acid (PA) content by enhancing the activity of endogenous phytase and acid phosphatase. The concentration of PA in hybrid sunflower achenes varied from 2.16 to 2.83g/100g of sample (p < 0.05). The phytase and acid phosphatase activities of sunflowers BRS191 and C11 were the highest on the 4th and 5th days of germination, respectively, with the release of the phosphorus. These results indicated that hybrid sunflower PA reduced and enhance phytase activity at distinct germination periods, which could open up the possibility of applying these enzymes in the control of PA content in cereals, thus improving their nutritional value.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Germination; Sunflower hybrids; Phytic acid; Phytase; Acid phosphatase.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400028
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MICROBIAL CHARACTERISTICS OF SOILS UNDER AN INTEGRATED CROP-LIVESTOCK SYSTEM Rev. Bras. Ciênc. Solo
Silva,Andréa Scaramal da; Colozzi Filho,Arnaldo; Nakatani,André Shigueyoshi; Alves,Sérgio José; Andrade,Diva de Souza; Guimarães,Maria de Fátima.
Integrated crop-livestock systems (ICLs) are a viable strategy for the recovery and maintenance of soil characteristics. In the present study, an ICL experiment was conducted by the Instituto Agronômico do Paraná in the municipality of Xambre, Parana (PR), Brazil, to evaluate the effects of various grazing intensities. The objective of the present study was to quantify the levels of microbial biomass carbon (MBC) and soil enzymatic activity in an ICL of soybean (summer) and Brachiaria ruziziensis (winter), with B. ruziziensis subjected to various grazing intensities. Treatments consisted of varying pasture heights and grazing intensities (GI): 10, 20, 30, and 40 cm (GI-10, GI-20, GI-30, and GI-40, respectively) and a no grazing (NG) control. The microbial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Microbial respiration; Acid phosphatase; Β-glucosidase; Arylsuphatase; Fluorescein diacetate hydrolysis; Carbono microbiano; Respiração microbiana; Fosfatase ácida; Β-glucosidase; Arilsulfatase; Hidrólise do diacetato de fluoresceína.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100040
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Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes. Repositório Alice
COSTA, A. R. da; SATO, J. H.; RAMOS, M. L. G.; FIGUEIREDO, C. C. DE; SOUZA, G. P. de; ROCHA, O. C.; GUERRA, A. F..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ciclagem do Fósforo; Atividade microbiana do solo; Fosfatase ácida; Matéria orgânica do solo; Café; Irrigação; Phosphorus cycling; Soil microbial activity; Acid phosphatase; Soil organic matter; Coffee; Irrigation; Coffea arabica.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/959399
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Microbiological properties and oxidizable organic carbon fractions of an oxisol under coffee with split phosphorus applications and irrigation regimes Rev. Bras. Ciênc. Solo
Costa,Adriana Rodolfo da; Sato,Juliana Hiromi; Ramos,Maria Lucrécia Gerosa; Figueiredo,Cícero Célio de; Souza,Géssica Pereira de; Rocha,Omar Cruz; Guerra,Antônio Fernando.
Phosphorus fertilization and irrigation increase coffee production, but little is known about the effect of these practices on soil organic matter and soil microbiota in the Cerrado. The objective of this study was to evaluate the microbiological and oxidizable organic carbon fractions of a dystrophic Red Latossol under coffee and split phosphorus (P) applications and different irrigation regimes. The experiment was arranged in a randomized block design in a 3 x 2 factorial design with three split P applications (P1: 300 kg ha-1 P2O5, recommended for the crop year, of which two thirds were applied in September and the third part in December; P2: 600 kg ha-1 P2O5, applied at planting and then every two years, and P3: 1,800 kg ha-1 P2O5, the requirement for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: P cycling; Soil microbial activity; Acid phosphatase; Soil organic matter.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100006
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Phosphate solubilization by endophytic bacteria isolated from banana trees Anais da ABC (AABC)
MATOS,AMANDA D.M.; GOMES,IZABELA C.P.; NIETSCHE,SILVIA; XAVIER,ADELICA A.; GOMES,WELLINGTON S.; DOS SANTOS NETO,JOSÉ A.; PEREIRA,MARLON C.T..
ABSTRACT Forty isolates of endophytic bacteria isolated from banana tree roots were assessed as to their capacity to solubilize phosphate in a solid culture medium supplemented with different inorganic and one organic source of phosphorus. The amount of phosphorus (P) in each liquid medium was quantified, and an indirect assessment of acid phosphatase activity was performed. All assays had a fully randomized design, with three repetitions. Approximately 67.5% of the 40 isolates assessed in solid medium solubilized phosphorus from tricalcium phosphate and 7.5% of the isolates solubilized phosphorus from soy lecithin; no isolates exhibited P solubilization capacity in medium supplemented with iron phosphate. Acid phosphatase activity was detected in 65% of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acid phosphatase; Bacillus sp.; Lecithin; Musa spp.; PGPB..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602945
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Phosphate solubilization potential and phosphatase activity of rhizospheric Trichoderma spp. BJM
Kapri,Anil; Tewari,Lakshmi.
Trichoderma sp., a well known biological control agent against several phytopathogens, was tested for its phosphate (P) solubilizing potential. Fourteen strains of Trichoderma sp. were isolated from the forest tree rhizospheres of pinus, deodar, bamboo, guava and oak on Trichoderma selective medium. The isolates were tested for their in-vitro P-solubilizing potential using National Botanical Research Institute Phosphate (NBRIP) broth containing tricalcium phosphate (TCP) as the sole P source, and compared with a standard culture of T. harzianum. All the cultures were found to solubilize TCP but with varying potential. The isolate DRT-1 showed maximum amount of soluble phosphate (404.07 µg.ml-1), followed by the standard culture of T. harzianum (386.42...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phosphate solubilization; Trichoderma; Acid phosphatase; Alkaline phosphatase; Chickpea.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300031
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Propriedades biologicas em agregados de um LE sob plantios convencional e direto no Cerrado. Infoteca-e
MENDES, I. de C.; SOUZA, L. V. de; RESCK, D. V. S.; GOMES, A. C..
2002
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Cerrado; Solo; Microbiologia do solo; Manejo do solo; Populacao microbiana; Biomassa; Fosfatase acida; Carbono; Atividade enzimatica; Enzima; Soil; Soil biology; Soil management; Microbial flora; Biomass; Carbon; Acid phosphatase; Enzymic activity; Enzimes.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/559745
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