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ABSTRACT The Northeast region of Brazil is the primary producer of yellow passion fruit. In recent years, water scarcity has led passion fruit growers to use highly saline water for cultivation. Therefore, implementing technologies that alleviate the negative effects of salt stress on plants is a promising approach, particularly in semi-arid conditions. This study aimed to assess the efficacy of organomineral fertilizers in mitigating salt stress effects on chlorophyll-a fluorescence and gas exchange in ‘Guinezinho’ yellow passion fruit seedlings. The treatments were arranged in randomized blocks with four replicates and four seedlings per plot, following a 2 × 3 factorial design. The factors considered were irrigation using water with low (0.18 dS m-1) and high (4.0 dS m-1) electrical conductivity and three liquid organomineral attenuators (Codasal™, Aminoagro Raiz™, and a mixture of Codasal™ + Aminoagro Raiz™ at a 1:1 v/v ratio), applied through fertigation. Irrigation with water containing 4.0 dS m-1 electrical conductivity, combined with liquid fertilizers, resulted in increased substrate salinity, and reduced stomatal conductance in yellow passion fruit seedlings, particularly when Codasal™ was applied. Application of Codasal™ alone or in combination with Aminoagro Raiz™ significantly enhanced variable fluorescence, quantum efficiency of PSII, CO2 assimilation rate, and instantaneous carboxylation efficiency in ‘Guinezinho’ yellow passion fruit seedlings.

RESUMO O Nordeste é a principal região produtora de frutos de maracujazeiro-amarelo no Brasil, que devido à escassez hídrica ocorrida nos últimos anos, os passifloricultores utilizam água de elevada concentração de sais para exploração da cultura. Dessa forma, o emprego de tecnologias que possibilite a atenuação do estresse salino às plantas é uma estratégia promissora nas condições de semiárido. Objetivou-se com o trabalho avaliar a ação de fertilizantes organominerais como atenuador do estresse salino sobre a fluorescência da clorofila a e trocas gasosas de mudas maracujazeiro-amarelo acesso ‘Guinezinho’. Os tratamentos foram distribuídos em blocos casualizados com quatro repetições e quatro mudas por parcela, empregando o esquema fatorial 2 × 3, referente às irrigação com água de baixa (0,18 dS m-1) e alta (4,00 dS m-1) condutividade elétrica e três atenuadores organomineral líquidos (Codasal®, Aminoagro Raiz® e mistura de Codasal® + Aminoagro Raiz® - proporção de 1/1 v/v), via fertirrigação. A irrigação com água de 4,0 dS m-1 associado com fertilizantes líquidos aumentam a salinidade do substrato e reduz a condutância estomática das mudas de maracujazeiro-amarelo, principalmente, com aplicação de Codasal®. A aplicação individual ou associado de Codasal® com Aminoagro Raiz® promove aumentos na fluorescência variável, eficiência quântica do PSII, taxa de assimilação de CO2 e eficiência instantânea de carboxilação em mudas de maracujazeiro-amarelo, acesso “Guinezinho”.

https://doi.org/10.1590/1807-1929/agriambi.v27n11p839-847

Nest refuse of Acromyrmex balzani (Hymenoptera: Formicidae) increases the plant vigor in Turnera subulata (Turneraceae)
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Santos, R. S.

; Sousa-Souto, L.

Brazilian Journal of Biology

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2023, Volume 83 elocation e244732

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Alguns estudos relatam o efeito positivo de resíduos orgânicos de formigueiros nas propriedades do solo e na estrutura da comunidade de plantas adjacentes em experimentos de campo, mas há uma lacuna sobre o efeito em espécies individuais. O objetivo do presente estudo foi comparar o desenvolvimento de Turnera subulata Smith, uma espécie ornamental, na presença do substrato de descarte (SD) de formigueiros produzido pela formiga cortadeira Acromyrmex balzani (Emery, 1890) por meio de experimento em casa de vegetação. O experimento foi conduzido com dois tratamentos: solo controle e solo com 25% de SD. As plantas foram mantidas em vasos de 1L por 90 dias. Foram avaliados os parâmetros: altura da planta, diâmetro do caule, comprimento da raiz, número de folhas, massa seca da raiz, biomassa seca e fresca da parte aérea. Além disso, o conteúdo relativo de clorofila e os nutrientes foliares foram usados como parâmetros fisiológicos. Como resultado, as plantas que cresceram no solo com SD apresentaram valores significativamente maiores de todos os parâmetros avaliados quando comparadas ao tratamento controle (p < 0.001). Concluímos que esse biofertilizante contribuiu para a produção de plantas mais vigorosas, podendo atuar na dinâmica local de nutrientes nos ecossistemas onde A. balzani ocorre. Além disso, por ser relativamente abundante e fácil de coletar, o SD de A. balzani tem potencial para ser utilizado como biofertilizante na produção de plantas de ciclo de vida curta.

Abstract Some studies report the positive effect of organic residues from ant nests on soil properties and on the structure of the adjacent plant community in field experiments, but there is a gap about the effect on individual species. The purpose of the present study was to compare the soil nutrient content and the development of Turnera subulata Smith, an ornamental species, in the presence of the nest refuse (basically composed of fragments of grass leaves and the symbiotic fungus) produced by the leaf-cutting ant Acromyrmex balzani (Emery, 1890) or in control soil through a greenhouse pot experiment. The experiment was carried out with two treatments: control soil and soil with 25% of nest refuse. The plants were kept in 1L pots for 90 days. We evaluated the parameters: plant height, stem diameter, root length, number of leaves, dry weight of the root, dry and fresh aboveground biomass. Additionally, the relative chlorophyll content and leaf nutrients were used as nutritional parameters. As a result, plants that grew in the soil with nest refuse showed significant higher values of all parameters evaluated when compared to the control treatment (p < 0.001). We conclude that this biofertilizer contributed to the production of more vigorous plants, being able to act on the local dynamics of nutrients in the ecosystems where A. balzani occurs. As it is relatively abundant and easy to collect, the refuse of A. balzani has the potential to be used as an alternative substrate in the production of shortlife cycle plants.

https://doi.org/10.1590/1519-6984.244732 333 downloads

Histology and induction of rooting in rubber tree cuttings (Hevea brasiliensis (Willd. Ex A.Juss.) Müll.Arg.)
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Rocha, L. F.

; Francisco, B. S.

; Dutra, F. B.

; Souto, L. S.

; Pinã-Rodrigues, F. C. M.

; Silva, J. M. S.

Brazilian Journal of Biology

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2023, Volume 83 elocation e274032

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract The rubber tree (Hevea brasiliensis (Willd. ex A.Juss.) Müll.Arg.), a native Amazonian species, is responsible for more than 50 thousand products and stands out as the world's main source of natural rubber. Commercial production is carried out by grafting, however, the technique has gaps in terms of time and quality for seedling production. Vegetative production via cuttings is an alternative, however, the species is difficult to root. Thus, the study tested the rooting induction, through a chemical method, with the hormonal regulator indolbutyric acid (IBA) of 5000 ppm, and a mechanical method, with the strangulation of stems, and the interaction between the methods, to analyze the survival and sprouting of rubber tree (Hevea brasiliensis) cuttings, as well as verifying the efficiency of breaking the sclerenchyma ring by strangulation. A randomized block design was used, with four treatments (control, with strangulation, with IBA, strangulation x IBA) distributed in six blocks with 36 cuttings. Data were submitted to ANOVA test and Tukey's post-test (p>0.05). The results obtained 12.5% of live cuttings, without rooting, during 68 days, being the combination of strangulation and IBA with greater survival and sprouting. No breakage of the sclerenchyma ring was observed by histological analysis. The data indicate strategic gains in combining chemical and mechanical techniques for species of difficult rooting in vegetative propagation, however, the test was not enough to affirm an answer in relation to each technique, the deepening of the technique on the behavior of the species remains the biggest challenge.

Resumo A seringueira (Hevea brasiliensis (Willd. ex A.Juss.) Müll.Arg.), espécie nativa da Amazônia, é responsável por mais de 50 mil produtos e se destaca como a principal fonte mundial de borracha natural. A produção comercial é realizada por enxertia, porém, a técnica apresenta lacunas em termos de tempo e qualidade para produção de mudas. A produção vegetativa via estaquia é uma alternativa, porém a espécie é de difícil enraizamento. Assim, o estudo testou a indução do enraizamento, por método químico, com o regulador hormonal ácido indolbutírico (AIB) de 5000 ppm, e método mecânico, com estrangulamento de hastes, e a interação entre os métodos, para analisar a sobrevivência e brotação de estacas de seringueira (Hevea brasiliensis), bem como verificar a eficiência da quebra do anel esclerenquimático por estrangulamento. Utilizou-se o delineamento em blocos ao acaso, com quatro tratamentos (testemunha, com estrangulamento, com AIB, estrangulamento x AIB) distribuídos em seis blocos com 36 estacas. Os dados foram submetidos ao teste ANOVA e pós-teste de Tukey (p>0,05). Os resultados obtiveram 12,5% de estacas vivas, sem enraizamento, durante 68 dias, sendo a combinação de estrangulamento e IBA com maior sobrevivência e brotação. Nenhuma quebra do anel esclerenquimático foi observada pela análise histológica. Os dados indicam ganhos estratégicos em combinar técnicas químicas e mecânicas para espécies de difícil enraizamento na propagação vegetativa, entretanto, o teste não foi suficiente para afirmar uma resposta em relação a cada técnica, resta o aprofundamento da técnica sobre o comportamento da espécie maior desafio.

https://doi.org/10.1590/1519-6984.274032

Soursop production under supplementary irrigation and mulching in the semiarid region of Brazil
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Cavalcante, Lourival F.

; Silva-Matos, Raíssa R. S.

; Souto, Antônio G. de L.

; Lima Neto, Antonio J. de

; Nunes, Járisson C.

; Mesquita, Francisco de O.

Revista Brasileira de Engenharia Agrícola e Ambiental

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aug 2021, Volume 25 N. 8 Pages 522 - 528

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO A irregularidade das chuvas na região semiárida do Brasil e do mundo exerce ação limitante na produção agrícola, em geral, inclusive das espécies frutíferas. Nessas condições, a irrigação é o insumo que mantém o sistema produtivo com viabilidade econômica e social. O estudo foi desenvolvido no período de 2012 a 2014, no município de Remígio, Estado da Paraíba, Brasil, com o objetivo de avaliar a produção de gravioleira ‘Morada’ cultivada em condições de sequeiro e irrigada, no solo sem e com cobertura morta em duas safras. Os tratamentos foram distribuídos em blocos casualizados com três repetições, em arranjo fatorial 2 × 3 × 2, relativos às plantas não irrigadas (lâmina de 0 mm) e irrigadas semanalmente (lâmina de 17,2 mm) no solo sem cobertura, com cobertura a partir de restos de culturas e com bagaço de sisal nas safras agrícolas de 2012/2013 e 2013/2014. No solo sem cobertura a irrigação elevou a produtividade de 5,3 para 34,7 t ha-1 na primeira safra e de 9,4 para 57,7 t ha-1 na segunda safra. O uso conjunto da irrigação e a cobertura com resíduo de sisal proporcionou as maiores produtividades. O uso do resíduo de sisal como cobertura morta aumentou o número e a massa média de frutos, a produção por planta e a produtividade da gravioleira ‘Morada’ em relação ao solo sem cobertura e coberto por resíduos culturais.

ABSTRACT Irregular rainfall in the semiarid region of Brazil and in the world exerts a limiting action on agricultural production, in general, including fruit species. Under these conditions, irrigation is the input that keeps the production system both economically and socially viable. This study was carried out from 2012 to 2014, in the municipality of Remígio, Paraíba State, Brazil, aiming at evaluating the production of ‘Morada’ soursop cultivated under rainfed and irrigated conditions, in soil with and without mulch, in two harvests. The treatments were distributed in randomized block design with three replicates in a 2 × 3 × 2 factorial scheme, corresponding to non-irrigated plants (0 mm water depth) and plants irrigated weekly (17.2 mm water depth) in soil without mulching, with cover crop residues, and with a sisal bagasse mulch in the 2012/2013 and 2013/2014 crop years. In the soil without mulching, irrigation increased yield from 5.3 to 34.7 t ha-1 in the first harvest and from 9.4 to 57.7 t ha-1 in the second harvest. The association between irrigation and mulch with sisal residue promoted the highest yield. The use of mulch of sisal residue increased the number and mean mass of fruits, production per plant and yield of ‘Morada’ soursop compared to the soil without mulch and covered by crop residues.

https://doi.org/10.1590/1807-1929/agriambi.v25n8p522-528 400 downloads

Exogenous application of phytohormones mitigates the effect of salt stress on Carica papaya plants
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Sá, Francisco V. da S.

; Brito, Marcos E. B.

; Silva, Luderlândio de A.

; Moreira, Rômulo C. L.

; Paiva, Emanoela P. de

; Souto, Lauter S.

Revista Brasileira de Engenharia Agrícola e Ambiental

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mar 2020, Volume 24 N. 3 Pages 170 - 175

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO A salinidade tem efeitos complexos nas interações fisiológicas, nutricionais e hormonais das plantas. Objetivou-se avaliar a ação mitigadora da aplicação exógena de diferentes tipos e concentrações de hormônios vegetais em plantas de Carica papaya sob estresse salino. O experimento foi realizado em casa de vegetação por meio do delineamento experimental de blocos casualizados com tratamentos formados a partir de esquema fatorial 2 x 3 x 5, relativo a duas concentrações de sais na água de irrigação (0,6 e 2,4 dS m-1), três tipos de hormônios vegetais [Auxina = ácido indol-3-acético; Citocinina = CPPU (N-(2-cloro-piridil)-N-feniluréia) e Giberelina = ácido giberélico(AG3)], e cinco concentrações do hormônio vegetal (0; 12,5; 25,0; 37,5 50,0 µM L-1), com três repetições, totalizando 90 parcelas; sendo a unidade experimental composta por seis plantas. O cultivo do C. papaya, cv. Sunrise Solo, foi realizado em bandejas de polietileno de 162 cédulas, com capacidade de 50 mL. As plântulas foram avaliadas quanto a percentagem de sobrevivência e o acúmulo de fitomassa até aos 25 dias após semeadura. O aumento da salinidade da água de irrigação exerce efeitos danosos nas plantas de C. papaya independente da aplicação de hormônios vegetais. A aplicação exógena da giberelina tem efeito positivo na mitigação do estresse salino em plântulas de C. papaya, superiores aos efeitos das auxinas e citocininas. As aplicações exógenas de giberelina e auxina na concentração de 37,5 µM L-1 mitigam os efeitos da salinidade sobre as plântulas de C. papaya. A aplicação exógena da citocinina nas concentrações de 12,5 a 50,0 µM L-1 é inviável para as plântulas de C. papaya.

ABSTRACT The salinity has complex effects on the physiological, nutritional and hormonal interactions of plants. This study aimed to evaluate the mitigating action of exogenous application of different types and concentrations of phytohormones on Carica papaya under salt stress. The experiment was conducted in greenhouse, using a randomized block design with treatments formed from a 2 x 3 x 5 factorial scheme, relative to two concentrations of salts in the irrigation water (0.6 and 2.4 dS m-1), three types of phytohormones [Auxin = indole-3-acetic acid; Cytokinin = CPPU (N-(2-chloro-pyridyl)-N-phenylurea) and Gibberellin = gibberellic acid(AG3)], and five concentrations of the phytohormone (0, 12.5, 25.0, 37.5 and 50.0 µM L-1), with three repetitions, totaling 90 plots, and the experimental unit consisted of six plants. C. papaya cv. ‘Sunrise Solo’ was grown on polyethylene trays of 162 cells, with capacity for 50 mL. The plants were evaluated for survival percentage and phytomass accumulation until 25 days after sowing. Increase in irrigation water salinity has deleterious effects on C. papaya plants regardless of the application of phytohormones. Exogenous application of gibberellin has a positive effect in mitigating salt stress on C. papaya plants, greater than the effects of auxins and cytokinins. Exogenous application of gibberellin and auxin at concentration of 37.5 µM L-1 mitigates the effects of salinity on C. papaya plants. Exogenous application of cytokinin at concentrations of 12.5 to 50.0 µM L-1 is not viable for C. papaya plants.

https://doi.org/10.1590/1807-1929/agriambi.v24n3p170-175 1670 downloads

High Throughput Mass Spectrometry Platform for Prospecting High Value Chemicals from Bioconversion of Glycerin
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Amazonas, Diana R.

; Souto, Augusto L.

; Vieira, Flávia S.

; Carneiro, Andréia A. J.

; Vianna, Rebeca B.

; Mendes, Thaís D.

; Lima, Karen S.

; Ribeiro, José A. A.

; Damaso, Mônica C. T.

; Rodrigues, Clenilson M.

; Abdelnur, Patrícia V.

Journal of the Brazilian Chemical Society

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dec 2019, Volume 30 N. 12 Pages 2712 - 2720

Abstract: En | Text: En | PDF: En

The use of bioprocess to convert low valued biomass or agroindustrial byproducts into high-value chemicals is an emerging area. However, laboratories usually use outdated analytical techniques to identify bioproducts, losing valuable information, such as the identification of unexpected compounds. In this work, we presented a successful systematic and modern analytical approach based on direct infusion mass spectrometry (DIMS) for an automated high-throughput screening of untargeted compounds from glycerin bioconversion process. We describe advantages of DIMS and its combined application with chemometrics towards an untargeted metabolomics approach to analyze several samples in a short time (11 samples per h). Three batches with 34 samples from the bioconversion of glycerin using several filamentous fungi strains were analyzed. Batch 347 was selected as promising, since high value chemicals, such as amide, phenolic and acid compounds, were identified. The platform presented was fast, robust, and versatile, then it could be applied to different bioprocesses.

https://doi.org/10.21577/0103-5053.20190210 354 downloads

Occurrence of aborted seeds in the cleistogamous flowers of Janusia guaranitica (A.St.-Hil.) A.Juss. (Malpighiaceae)
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Silva, J. V.

; Souto, L. S.

; Sebastiani, R.

Brazilian Journal of Biology

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apr 2019, Volume 79 N. 2 Pages 358 - 360

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/1519-6984.174319 843 downloads

Exudate - phenolphthalein pH test for evaluation of validity in seeds of Libidibia ferrea
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SOUTO, PRISCILA C.

; GONÇALVES, EDILMA P.

; VIANA, JEANDSON S.

; SILVA, JÚLIO C.A.

; FERREIRA, DÉBORA T.R.G.

; RALPH, LIDIANA N.

Anais da Academia Brasileira de Ciências

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2019, Volume 91 N. 4 elocation e20180734

Abstract: En | Text: En | PDF: En

Abstract: Seed companies are looking for promising, quick and effective alternatives to determine the physiological quality of seeds. The objective of the current work was to study the efficiency of the exudate - phenolphthalein pH test to evaluate the seeds of two lots of Libidibia ferrea (Mart. ex Tul.) L. P. Queiroz var. ferrea. The statistical design for the the exudate - phenolphthalein pH test was completely randomized with four replicates of 50 seeds in a factorial design (2 x 5), two seed lots and five soaking periods (30, 60, 90, 120, and 150 minutes), respectively, using two constant temperatures (25 and 30°C). The percentage of viability and germination of the seeds did not differ in the temperatures of 25 and 30°C and in the soaking periods by the exudate - phenolphthalein pH test. Thus, it is recommended that the test be conducted for at least 30 minutes in distilled and deionized water at the constant temperature of 25 or 30°C to evaluate the vigor of the Libidibia ferrea.

https://doi.org/10.1590/0001-3765201920180734 1328 downloads

Efeitos do biochar, culturas de cobertura e lodo de esgoto nos atributos físicos do solo
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Pradi Vendruscolo, Eduardo

; Alves, Marlene Cristina

; Freitas Leal, Aguinaldo José

; de Souza, Epitácio José

; Souto Filho, Sebastião Nilce

Ciencia del suelo

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jul 2018, Volume 36 N. 1 Pages 01 - 10

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O manejo incorreto dos solos culmina na formação de grandes áreas com reduzida capacidade de ustentação da vida. A recuperação dessas áreas possui elevada importância ecológica, social e econômica. Assim, o presente trabalho foi desenvolvido com o objetivo de avaliar os efeitos da adição do biochar a tratamentos pré-estabelecidos há 9 anos para a recuperação de um Latossolo Vermelho. O delineamento adotado foi definido em blocos casualizados, em esquema fatorial 6x2, seis tratamentos (T1 - Solo exposto; T2 - Gonçalo-alves (Astronium fraxinifolium S.) (GA); T3 - Gonçalo- alves + Crotalária júncea L. (GA+CR); T4 - Gonçalo-alves + Canavalia ensiformis L. (GA+FP); T5 - Gonçalo-alves + lodo de esgoto (60 t ha-1) + Urochloa (Syn. Brachiaria) decumbens S. (GA+BR+LE); T6 - Mata nativa de Cerrado) e duas épocas de avaliação do solo, anteriormente e após a aplicação do biochar. Amostras de cada parcela foram coletadas em quatro profundidades (0,00-0,05, 0,05-0,10, 0,10-0,20 e 0,20-0,40 m), nas quais foram avaliadas as características de porosidade, densidade, infiltração e resistência à penetração do solo. A macroporosidade do solo, de modo geral, foi afetada nas camadas até 0,10 m de profundidade, onde todos os tratamentos, com exceção dos tratamentos GA+CR e GA+BR+LE na profundidade de 0,05-0,10 m, apresentaram-se estatisticamente superiores à área degradada original quando houve a aplicação do biochar. Portanto, em curto prazo, a aplicação do biochar aumenta a macroporosidade da camada superficial, pouco interferindo nas demais propriedades físicas do Latossolo Vermelho degradado. No entanto, os tratamentos com adubos verdes e lodo de esgoto resultam em melhoras significativas nas propriedades do solo estudadas.

Improper soil management culminates in the formation of large areas with reduced life sustaining capacity. The recovery of these areas has high ecological, social and economic importance. The present work was developed with the objective of evaluating the effects of the addition of biochar to treatments previously established 9 years ago for the recovery of an Oxisol. The study design was set in a randomized block design with factorial 6x2, six treatments (T1 - Exposed soil, T2 - Goncalo-alves (Astronium fraxinifolium S.) (GA), T3 - Goncalo-alves + Crotalaria júncea L. (GA+CR), T4 - Goncalo- alves + Canavalia ensiformis L. (GA+FP); T5 - Goncalo-alves and sewage sludge (60 t ha-1) + Urochloa (Syn . Brachiaria) decumbens S. (GA+BR+LE); T6 - Native Cerrado Forest) and two periods of soil evaluation, before and after the application of biochar. Soil macroporosity in general, was affected in layers up to 0.10 m, where all treatments, except for GA+CR and GA+BR+LE treatments at a depth of 0.05-0.10 m, showed statistical superiority to the original degraded area when there was the application of biochar. Therefore, in the short term, the application of biochar increases the macroporosity in the surface layer, having little impact in other physical properties of a degraded Oxisol. However, treatments with green manures and sewage sludge resulted in significant improvements in the soil properties studied.

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10.

SmartCoM: Smart Consumption Management Architecture for Providing a User-Friendly Smart Home based on Metering and Computational Intelligence
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Oliveira, Edvar da L.

; Alfaia, Rodrigo D.

; Souto, Anderson V. F.

; Silva, Marcelino S.

; Francês, Carlos Renato L.

; Vijaykumar, N. L.

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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sep 2017, Volume 16 N. 3 Pages 736 - 755

Abstract: En | Text: En | PDF: En

Abstract With advances in information technology for health and wellness, Smart Home-based solution providers using Internet of Things (IoT) technologies, have increased in importance and become accepted as an alternative means of saving energy when based on Home Energy Management Systems (HEMS). This paper defines a modern architecture (SmartCoM), which is implemented to monitor and manage residential dwellings by using IoT technologies. This involves setting out the parameters that can make interoperability possible between measurement and management, and the layers of data communication, which are the features necessary for the hardware required for monitoring and measurement. In addition, an interface is defined by a middleware layer to integrate the management of external installations and the visualization of data by means of a cloud service. The SmartCoM end-to-end architecture is defined in detail from the standpoint of the consumer and optimization strategies are employed for both the end customer and the utility. The main advantages of using SmartCoM were confirmed by the numerical results obtained from the proposed architecture. This paper ends by showing the current position of SmartCoM as well as suggesting further stages for this line of research.

https://doi.org/10.1590/2179-10742017v16i3965 1689 downloads

11.

Growth and production of dwarf coconut in saline-sodic soil under doses of potassium sulfate
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Pereira, Tiago de A.

; Souto, Lauter S.

; Sá, Francisco V. da S.

; Dutra Filho, João A.

; Souza, Tarso M. A. de

; Paiva, Emanoela P. de

Revista Brasileira de Engenharia Agrícola e Ambiental

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jul 2017, Volume 21 N. 7 Pages 454 - 458

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivou-se, com este trabalho, avaliar a influência de doses de sulfato de potássio aplicado via solo no crescimento e produção do coqueiro anão verde (Cocos nucifera L.) cultivado em solo salino-sódico. O experimento foi conduzido durante os meses de janeiro de 2013 a janeiro de 2016, em pomar comercial, no Setor 7 das Várzeas de Sousa, PB, em Vertissolo Ebânico. Utilizaram-se plantas de coqueiro pertencentes à variedade anã verde, espaçadas em formato retangular 7,0 x 7,0 m, iniciando o terceiro ano em fase de estabilização de produção. Adotou-se o delineamento experimental em blocos casualizados avaliando cinco doses de sulfato de potássio (K2SO4) (0; 0,52; 1,04; 2,08 e 4,16 kg planta-1 ano-1), com quatro repetições, sendo quatro plantas úteis por repetição totalizando 20 unidades experimentais. As doses de K2SO4 influenciaram positivamente o crescimento e a produção do coqueiro anão verde em solo salino-sódico. O maior crescimento em altura e diâmetro da estirpe do coqueiro foi obtido sob a dose de 4,16 kg planta-1 ano-1 de K2SO4. Os maiores frutos e volume de água no primeiro ano de produção foram obtidos com as quantidades aplicadas de 2,08 a 2,81 kg planta-1 ano-1 de K2SO4.

ABSTRACT The objective was to study the influence of potassium sulfate doses applied to the soil on the growth and production of green dwarf coconut (Cocos nucifera L.) grown in saline-sodic soil. The experiment was conducted from January 2013 to January 2016, in a commercial plantation in the Sector 7 of the ‘Várzeas de Sousa’ Irrigation District, PB, Brazil, in saline-sodic Ebanic Vertisol. The experiment used coconut plants belonging to green dwarf variety, arranged in a 7.0 x 7.0 m rectangular shape, starting the third year in the production stabilization stage. The adopted experimental design was randomized blocks, evaluating five doses of potassium sulfate (K2SO4) (0, 0.52, 1.04, 2.08 and 4.16 kg plant-1 year-1), with four replicates of four plants each, totaling 20 experimental units. The K2SO4 doses positively influenced the growth and production of green dwarf coconut trees in saline-sodic soil. The highest growth in height and diameter of this coconut variety was obtained at the K2SO4 dose of 4.16 kg plant-1 year-1. The largest fruits and water volume in the first year of production were obtained with K2SO4 doses from 2.08 to 2.81 kg plant-1 year-1.

https://doi.org/10.1590/1807-1929/agriambi.v21n7p454-458 890 downloads

12.

Assessment of the antiproliferative and antigenotoxic activity and phytochemical screening of aqueous extracts of Sambucus australis Cham. & Schltdl. (ADOXACEAE)
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TEDESCO, MARÍLIA

; KUHN, ANDRIELLE W.

; FRESCURA, VIVIANE DAL-SOUTO

; BOLIGON, ALINE A.

; ATHAYDE, MARGARETH L.

; TEDESCO, SOLANGE B.

; SILVA, ANTONIO C.F. DA

Anais da Academia Brasileira de Ciências

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2017, Volume 89 N. 3 Pages 2141 - 2154

Abstract: En | Text: En | PDF: En

ABSTRACT The purpose of this study was to evaluate the antiproliferative and antigenotoxic activity of Sambucus australis Cham. & Schltdl. aqueous extracts on the cell cycle of Allium cepa L. as well as determine the phenolic compounds in such extracts. S. australis inflorescences and leaves of two accessions were used for aqueous extract preparation at concentrations: 0.003 g/ml and 0.012 g/ml. A. cepa bulbs were rooted in distilled water and, subsequently, placed in treatments for 24 hours. Rootlets were collected and fixed in modified Carnoy’s solution for 24 hours and kept. The squash technique was performed for slide preparation. Root tips were smashed and stained with 2% acetic orcein, and a total of 4000 cells per treatment were analyzed. The phenolic compounds were determined using high-performance liquid chromatography and data was analyzed using the Scott-Knott test. The results show that S. australis aqueous extracts have antiproliferative potential. Besides, the extracts prepared from S. australis leaves of both accessions at a concentration of 0.012 g/ml have shown antigenotoxic activity. The phytochemical analysis allowed us to determine the presence of flavonoids and phenolic acids, of which kaempferol and chrologenic acid were the most predominant compounds in the extracts from the inflorescences and leaves, respectively.

https://doi.org/10.1590/0001-3765201720150138 1366 downloads

13.

Tolerance of castor bean cultivars under salt stress
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Sá, Francisco V. da S.

; Paiva, Emanoela P. de

; Mesquita, Evandro F. de

; Bertino, Antonio M. P.

; Barbosa, Marcelo A.

; Souto, Lauter S.

Revista Brasileira de Engenharia Agrícola e Ambiental

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jun 2016, Volume 20 N. 6 Pages 557 - 563

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Propôs, com este estudo, avaliar a tolerância de cultivares de mamoneira sob estresse salino durante a fase inicial de crescimento. Utilizou-se esquema fatorial 5 x 4, em delineamento em blocos casualizados, resultando em 20 tratamentos (5 níveis de salinidade (0,6 -controle; 1,2; 1,8; 2,4 e 3,0 dS m-1) x 4 cultivares de mamoneira (BRS Energia; LA Guarani; BRS Gabriela e IAC 028)] com 3 repetições. Aos 30 dias após a semeadura as plantas foram avaliados para crescimento, acúmulo de matéria seca e tolerância à salinidade. O aumento dos níveis de salinidade da água usada na irrigação reduziu o crescimento de todas as cultivares estudadas; a tolerância à salinidade das cultivares de mamoneira obedece a seguinte sequência: BRS Energia > BRS Gabriela = IAC 028 > LA Guarani.

ABSTRACT This study aimed to evaluate the tolerance of castor bean cultivars under salt stress during the initial growth stage. The experiment was set in randomized blocks, in a 5 x 4 factorial scheme, resulting in 20 treatments, 5 salinity levels (0.6-control, 1.2, 1.8, 2.4 and 3.0 dS m-1) and 4 castor bean cultivars (BRS Energy, LA Guarani, BRS Gabriela and IAC 028)] with 3 replicates. At 30 days after sowing, plants were evaluated for growth, dry matter accumulation and salt tolerance. Increased salinity levels in the water used for irrigation reduced the growth of all the studied cultivars. The salt tolerance of the studied castor bean cultivars follows the following order: BRS Energia > BRS Gabriela = IAC 028 > LA Guarani.

https://doi.org/10.1590/1807-1929/agriambi.v20n6p557-563 1289 downloads

14.

II Diretriz de Ressonância Magnética e Tomografia Computadorizada Cardiovascular da Sociedade Brasileira de Cardiologia e do Colégio Brasileiro de Radiologia
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Sara, Leonardo

; Szarf, Gilberto

; Tachibana, Adriano

; Shiozaki, Afonso Akio

; Villa, Alexandre Volney

; Oliveira, Amarino Carvalho de

; Albuquerque, Andrei Skromov de

; Rochitte, Carlos Eduardo

; Nomura, César Higa

; Azevedo, Clerio Francisco

; Jasinowodolinski, Dany

; Tassi, Eduardo Marinho

; Medeiros, Fabio de Morais

; Kay, Fernando Uliana

; Junqueira, Flávia Pegado

; Azevedo, Guilherme S. A.

; Monte, Guilherme Urpia

; Pinto, Ibraim Masciarelli Francisco

; Gottlieb, Ilan

; Andrade, Joalbo

; Lima, João A. C.

; Parga Filho, José Rodrigues

; Kelendjian, Juliana

; Fernandes, Juliano Lara

; Iquizli, Leonardo

; Correia, Luis C. L.

; Quaglia, Luiz Augusto

; Gonçalves, Luiz Flavio Galvão

; Ávila, Luiz Francisco

; Zapparoli, Marcello

; Hadlich, Marcelo

; Nacif, Marcelo Souto

; Barbosa, Márcia de Melo

; Minami, Márcio Hiroshi

; Bittencourt, Marcio Sommer

; Siqueira, Maria Helena Albernaz

; Silva, Marly Conceição

; Lopes, Marly Maria Uellendahl

; Marques, Mateus Diniz

; Vieira, Mônica La Rocca

; Coellho Filho, Otávio Rizzi

; Schvartzman, Paulo R.

; Santos, Raul D.

; Cury, Ricardo C.

; Loureiro, Ricardo

; Cury, Roberto Caldeira

; Sasdelli Neto, Roberto

; Macedo, Robson

; Cerci, Rodrigo Julio

; Faria Filho, Rui Alberto de

; Cardoso, Sávio

; Naves, Thiago

; Magalhães, Tiago Augusto

; Senra, Tiago

; Burgos, Ursula Maria Moreira Costa

; Moreira, Valéria de Melo

; Ishikawa, Walther Yoshiharu

Arquivos Brasileiros de Cardiologia

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dec 2014, Volume 103 N. 6 Pages 1 - 86

Abstract: Pt | Text: Pt | PDF: Pt

https://doi.org/10.5935/abc.2014S006 67586 downloads

15.

Cathodic voltammetric detection of diltiazem at a bismuth film electrode: application to human urine and pharmaceuticals
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Catarino, Rita I. L.

; Leal, M. Fernanda C.

; Pimenta, Adriana M.

; Souto, M. Renata S.

; Lopes, Joana R. T.

Journal of the Brazilian Chemical Society

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may 2014, Volume 25 N. 5 Pages 961 - 968

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Neste trabalho foi desenvolvida uma nova metodologia de voltametria catódica de onda quadrada com elétrodo de filme de bismuto (BiFE) para a determinação de um anti-hipertensivo e vasodilatador coronário - o diltiazem. O filme de bismuto foi depositado ex situ na superfície de um elétrodo de carbono vítreo durante 90 s a um potencial de -1,4 V vs. Ag/AgCl, usando uma solução de tampão acetato (pH 4,5; 0,10 mol L-1) contendo 5 ou 30 mg L-1 de Bi. O sinal analítico do diltiazem foi obtido numa solução de tampão fostato (pH 7,4; 0,25 mol L-1) onde se verificou que a redução ocorria a -1,5 V vs. Ag/AgCl. A metodologia proposta foi aplicada à quantificação de diltiazem em formulações farmacêuticas (faixa linear de resposta compreendida entre 90 e 900 µg L-1) e em amostras de urina (faixa linear de resposta compreendida entre 45 e 270 µg L-1, e limite de deteção de 12 µg L-1).

In this work it was developed a novel application of bismuth film electrodes (BiFEs) for the determination of the antihypertensive and coronary vasodilator diltiazem by square wave cathodic voltammetry. The bismuth film was deposited ex situ on a glassy carbon electrode for 90 s at -1.4 V vs. Ag/AgCl, from an acetate buffer (pH 4.5; 0.10 mol L-1) containing 5 or 30 mg L-1 Bi. Diltiazem analytical signal was obtained in phosphate buffer (pH 7.4; 0.25 mol L-1) where reduction takes place at -1.5 V vs. Ag/AgCl. The proposed methodology was applied to the quantification of diltiazem in pharmaceutical samples (dynamic linear range comprised between 90 and 900 µg L-1) and in human urine (dynamic linear range comprised between 45 and 270 µg L-1, and detection limit of 12 µg L-1).

https://doi.org/10.5935/0103-5053.20140067 1413 downloads

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