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au:Vieira, Daniel Amorim

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Is a diet of Planococcus citri nymphs and adults suitable for Chrysoperla externa for use in biological control?
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Carvalho, Marília Mickaele Pinheiro

; Corrêa Reis, Lítissa Aparecida

; Pinheiro, Maria Luísa Campos

; Moreira, Maísa Melo

; Vieira, Daniel Amorim

; Souza, Brígida

Revista Brasileira de Entomologia

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2023, Volume 67 Nº 1 elocation e20220010

Resumo: En | Texto: En | PDF: En

ABSTRACT Several studies have shown that the survival and reproduction of lacewings varies depending on the type of prey they consumed, especially during the first instar. In this study, we evaluated the effect of a diet consisting of Ephestia kuehniella (EK) and/or Planococcus-citri (PC) eggs offered to first instar Chrysoperla externa on subsequent development and survival. Larvae supplied only with P. citri (PC) nymphs had extended immature development, low survival, adults with lower weight and longevity, low fecundity and egg viability, and lower net reproduction rate (R0). Larvae submitted to the treatment EK+PC responded positively to the diet, showing results similar to those obtained in the control-EK treatment. Therefore, this mealybug supports suitable development and reproduction of C. externa when it is provided to second instar larvae after they fed on E. kuehniella eggs as first instars. As far as we know, this is the first report that demonstrates the effect of natural prey and alternatives on different larval stages of lacewings. This information is valuable in developing protocols for use of C. externaas a pest control agent.

https://doi.org/10.1590/1806-9665-rbent-2022-0010

Drought/rewatering cycles on the vegetative growth of citrus seedlings
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Toro-Herrera, Mayra Alejandra

; Vieira, Daniel Amorim

; Alvarenga, Joyce Pereira

; Silva, Layane

; Mendonça, Ane Marcela das Chagas

; Ferreira, Ester Alice

; Barbosa, João Paulo Rodrigues Alves Delfino

Pesquisa Agropecuária Brasileira

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2023, Volume 58 elocation e03331

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract The objective of this work was to evaluate the effect of three dehydration/rehydration cycles on the vegetative growth and shoot dry matter of citrus seedlings, as well as seedling acclimatization to this environmental stress. The five following water regimes were evaluated: WR1 (control), WR2, and WR3, with plants kept at 100, 75, and 50% of pot capacity during the three cycles, respectively; and WR4 and WR5, with plants kept at 75, 100, and 75% and 50, 100, and 50% of pot capacity during the first, second, and third cycles, respectively. Relative water content, plant height, length and diameter of the main and secondary branches, angle of leaf insertion in the branch, specific leaf area, leaf chlorophyll content, and dry matter were evaluated. Rehydration after a cycle with 50% of pot capacity did not improve plant growth or dry matter accumulation in relation to the well-hydrated plants of the control. However, after a cycle with 75% of pot capacity, rehydration restores water content, the diameter of the secondary branches, and the angle of leaf insertion. The exposure to successive events of dehydration/rehydration makes the citrus seedlings more resistant to future exposures to water stress.

Resumo O objetivo deste trabalho foi avaliar o efeito de três ciclos consecutivos de desidratação/reidratação no crescimento vegetativo e na matéria seca de mudas de citros, bem como a aclimatação dessas mudas a esse estresse ambiental. Foram avaliados os seguintes cinco regimes hídricos: WR1 (controle), WR2 e WR3, com plantas mantidas em 100, 75 e 50% da capacidade de vaso durante os três ciclos, respectivamente; e WR4 e WR5, com plantas mantidas em 75, 100 e 75% e 50, 100 e 50% da capacidade de vaso durante o primeiro, o segundo e o terceiro ciclo, respectivamente. Foram avaliados teor relativo de água, altura da planta, comprimento e diâmetro dos ramos principal e secundário, ângulo de inserção da folha no ramo, área foliar específica, teor de clorofila foliar e matéria seca. A reidratação após um ciclo com 50% da capacidade do vaso não aumentou o crescimento nem o acúmulo de matéria seca das plantas, em comparação às plantas bem hidratadas do controle. Porém, após um ciclo com 75% da capacidade do vaso, a reidratação repôs o teor de água, o diâmetro dos ramos secundários e o ângulo de inserção das folhas. A exposição a sucessivos eventos de desidratação/reidratação torna as mudas de citros mais resistentes a futuras exposições ao estresse hídrico.

https://doi.org/10.1590/s1678-3921.pab2023.v58.03331

Mapping phenotypic parameters linked to salt stress tolerance strategies in rice lines
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Vieira, Daniel Amorim

; Toro-Herrera, Mayra Alejandra

; Pennacchi, João Paulo

; Mendonça, Ane Marcela das Chagas

; Marchiori, Paulo Eduardo Ribeiro

; Botelho, Flávia Barbosa Silva

; Barbosa, João Paulo Rodrigues Alves Delfino

Bragantia

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2022, Volume 81 elocation e1122

Resumo: En | Texto: En | PDF: En

ABSTRACT Salinity is recognized as one of the main abiotic stresses, causing declines in the productivity of many crops, such as rice. Considering the importance of rice as a staple food crop, the generalized pattern of salinization in soils around the globe and the sensitivity of the crop to saline soils, the aim of this study was to evaluate the sensitivity / tolerance of upland rice lines. The upland rice lines used in this work were obtained from the Genetic Improvement Program of the Universidade Federal de Lavras. The experiment was carried out in a greenhouse, with a block design and factorial scheme, with 10 lines and four NaCl treatments (0, 3, 15 and 45 mmol·L-1) on the substrate. Parameters related to the emergence rate, seedling survival rate, growth and architecture, biomass allocation, gas exchange and productivity were evaluated. Salinity levels influenced the emergence and survival rates, especially at the highest levels of NaCl, with lines L1, L4 and L5 showing survival below 60%. These lines were excluded from the experiment, and the other seven lines were carried out until the end of the crop cycle. Grain weight per plant (GWP) was used as an indicator of greater tolerance to salinity, and lines L6, L7 and L8 showed outstanding performance under treatments with increased NaCl. L6 had the highest GWP, while L7 and L8 had less pronounced decreases with increasing NaCl doses. These three lines may be recommended for further studies about the impacts of NaCl on rice production.

https://doi.org/10.1590/1678-4499.20210172

Trophic relationship between Chrysoperla externa (Neuroptera: Chrysopidae) and Planococcus citri (Hemiptera: Pseudococcidae) associated with rose bushes
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Carvalho, Marília Mickaele Pinheiro

; Moreira, Maísa Melo

; Vieira, Daniel Amorim

; Reis, Lítissa Aparecida Corrêa

; Souza, Maria Eduarda Ferreira

; Hernandez, Marvin Mateo Pec

; Souza, Brígida

Revista Brasileira de Entomologia

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2022, Volume 66 Nº spe elocation e20220064

Resumo: En | Texto: En | PDF: En

ABSTRACT This study aimed to determine the consumption of Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) nymphs and the predator:prey ratio required for high predatory efficacy and survival of Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) larvae under different densities of prey, reared in rose bushes. Consumption by first-, second-, and third-instar larvae of C. externa was assessed. The predatory efficiency and survival of the predator were calculated for larvae in the second instar under densities of 20, 40, 80, 120, and 160 nymphs of P. citri and predator:prey ratios of 1:5, 1:10, and 1:20. The assessments were performed after 24 and 48 hours of exposure between species. There was increasing consumption throughout the larval development of C. externa. The predator:prey ratios 1:5 and 1:10 were the most efficient for P. citri population reduction, but the 1:5 ratio led to lower survival of larvae than the 1:10 and 1:20 ratios. There was a positive correlation between C. externa larval density and cannibalism (ρ = 0.45) and a negative correlation between predator density and P. citri population density (ρ = -0.81). Third-instar larvae consume more P. citri nymphs than second-instar larvae. Second-instar larvae of this lacewing released at a 1:20 ratio caused total mortality of mealybug nymphs within 48 hours, regardless the density of P. citri, with high larvae survival of C. externa.

https://doi.org/10.1590/1806-9665-rbent-2022-0064

Inter - and intraspecific relationships between Macrosiphum rosae (Hemiptera: Aphididae) and Chrysoperla externa (Neuroptera: Chrysopidae)
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Carvalho, Marília Mickaele Pinheiro

; Vieira, Daniel Amorim

; Pec, Marvin

; Souza, Brígida

Revista Brasileira de Entomologia

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2022, Volume 66 Nº spe elocation e20220086

Resumo: En | Texto: En | PDF: En

ABSTRACT The predator Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) is a polyphagous species that has, among its wide range of acceptable prey, the aphid Macrosiphum rosae (Linnaeus, 1758) (Hemiptera: Aphididae), an important pest of rose plants. We assessed the consumption of nymphs and adults of M. rosae by C. externa larvae, the predatory efficiency, and larval survival under different predator:prey ratios, densities of aphids, and ages of aphids. The bioassays were performed at 25 ± 1°C and 70 ± 10% RH under a 12-hour photoperiod, with aphids taken from roses of the cultivar Avalanche. Consumption was assessed by making young aphids (2nd and 3rd instars) and more developed aphids (4th instar and adult) available throughout the larval stage of the predator. The predatory efficiency and survival were studied for second-instar larvae offered M. rosae nymphs at densities of 20, 40, 80, 120, and 160 using predator:prey ratios of 1:5, 1:10, and 1:20. The assessments were performed 24, 48, and 72 hours after putting the species together. All of the C. externa instars consumed younger than older aphids. Larvae in the third instar consumed 80% of the young aphids and 77% of the older aphids. The higher the predator:prey ratio and larval density, the higher the predatory efficiency and the lower the larval survival. The ratios 1:5 and 1:10 led to the elimination of younger and older aphid populations 72 hours into the interaction between species.

https://doi.org/10.1590/1806-9665-rbent-2022-0086

Guideline of the Brazilian Society of Cardiology on Telemedicine in Cardiology - 2019
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Lopes, Marcelo Antônio Cartaxo Queiroga

; Oliveira, Gláucia Maria Moraes de

; Ribeiro, Antonio Luiz Pinho

; Pinto, Fausto J.

; Rey, Helena Cramer Veiga

; Zimerman, Leandro Ioschpe

; Rochitte, Carlos Eduardo

; Bacal, Fernando

; Polanczyk, Carisi Anne

; Halperin, Cidio

; Araújo, Edson Correia

; Mesquita, Evandro Tinoco

; Arruda, José Airton

; Rohde, Luis Eduardo Paim

; Grinberg, Max

; Moretti, Miguel

; Caramori, Paulo Ricardo Avancini

; Botelho, Roberto Vieira

; Brandão, Andréa Araújo

; Hajjar, Ludhmila Abrahão

; Santos, Alexandre Fonseca

; Colafranceschi, Alexandre Siciliano

; Etges, Ana Paula Beck da Silva

; Marino, Bárbara Campos Abreu

; Zanotto, Bruna Stella

; Nascimento, Bruno Ramos

; Medeiros, Cesar Rocha

; Santos, Daniel Vitor de Vasconcelos

; Cook, Daniela Matos Arrowsmith

; Antoniolli, Eduardo

; Souza Filho, Erito Marques de

; Fernandes, Fábio

; Gandour, Fabio

; Fernandez, Francisco

; Souza, Germano Emilio Conceição

; Weigert, Guilherme de Souza

; Castro, Iran

; Cade, Jamil Ribeiro

; Figueiredo Neto, José Albuquerque de

; Fernandes, Juliano de Lara

; Hadlich, Marcelo Souza

; Oliveira, Marco Antonio Praça

; Alkmim, Maria Beatriz

; Paixão, Maria Cristina da

; Prudente, Maurício Lopes

; Aguiar Netto, Miguel A. S.

; Marcolino, Milena Soriano

; Oliveira, Monica Amorim de

; Simonelli, Osvaldo

; Lemos Neto, Pedro A.

; Rosa, Priscila Raupp da

; Figueira, Renato Minelli

; Cury, Roberto Caldeira

; Almeida, Rodrigo Coelho

; Lima, Sandra Regina Franco

; Barberato, Silvio Henrique

; Constancio, Thiago Inocêncio

; Rezende, Wladimir Fernandes de

Arquivos Brasileiros de Cardiologia

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Nov 2019, Volume 113 Nº 5 Páginas 1006 - 1056

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

https://doi.org/10.5935/abc.20190205 5274 downloads

Antibacterial activity of the skin secretion of Phyllomedusa azurea (Anura: Hylidae) from the Central Brazil Cerrado
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De Almeida, Daniela Andrade

; Dietz, Jefferson do Carmo

; De Oliveira, Bruno Francesco Rodrigues

; Vieira, José Daniel Gonçalves

; Magalhães, Marta Regina

; Jesuíno, Rosália Santos Amorim

Revista de Biología Tropical

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Mar 2019, Volume 67 Nº 1 Páginas 1 - 10

Resumo: Es En | Texto: Es En | PDF: Es | PDF: En

Resumen P. azurea es una especie de rana bien distribuida geográficamente en América del Sur, que incluye biomas brasileños como Pantanal y Cerrado. En comparación con otros anuros de Phyllomedusinae, existen pocos informes sobre el potencial bioactivo de las moléculas derivadas de la piel de esta especie. En esta perspectiva, el objetivo del presente estudio fue evaluar la actividad antibacteriana in vitro de la secreción de la piel de P. azurea mediante la detección de la Concentración Inhibitoria Mínima (CIM) del crecimiento de cepas indicadoras bacterianas y determinar si ocurre un cambio en la permeabilidad de la envoltura celular bacteriana. La determinación de MIC se llevó a cabo mediante el método de la placa de microdilución. La absorbancia se midió y se analizó estadísticamente mediante la prueba t para comparar dos grupos (0.05 de significancia). El impacto del extracto crudo sobre la permeabilidad de la envoltura celular de Staphylococcus aureus ATCC 25923 se realizó mediante el ensayo de cristal violeta, y se midió la absorbancia mediante espectrofotometría seguida del cálculo del porcentaje de absorción de violeta cristal. La CIM específica para S. aureus ATCC 25923 y Escherichia coli ATCC 25922 fue 31.25 μg / ml, mientras que para Bacillus subtilis ATCC 6633 de 125 μg / ml y Pseudomonas aeruginosa ATCC 27853 de 250 μg / ml. El tratamiento con concentraciones crecientes de secreción de piel de rana aumentó la absorción de violeta cristal por las células de S. aureus ATCC 25923, sugiriendo una acción sobre la membrana plasmática de la célula. Los resultados demostraron que la secreción de la piel de P. azurea presenta actividad antibacteriana y amerita más investigaciones para caracterizar las moléculas bioactivas.

Abstract Phyllomedusa azurea is a frog species well distributed geographically in South America, including Brazilian biomes as Pantanal and Cerrado. Compared with other anurans from the Phyllomedusinae family, there are few reports on the bioactive potential of skin-derived molecules from this species. In this perspective, the aim of the present study was to evaluate the in vitro antibacterial activity of skin secretion of P. azurea by detection of Minimum Inhibitory Concentration (MIC) of the growth of bacterial indicator strains and to determine if occurs a changing in the bacterial cell envelope permeability. The MIC determination was carried out by the microdilution plate method. The absorbance was measured and analyzed statistically using the t-test to compare two groups (0.05 % of significance). The impact of the crude extract on cell envelope permeability of Staphylococcus aureus ATCC 25923 was conducted by the crystal violet assay, and the absorbance was measured spectrophotometry followed by the calculation of the crystal violet uptake percentage. The specific MIC for S. aureus ATCC 25923 and Escherichia coli ATCC 25922 was 31.25 µg/mL, while for Bacillus subtilis ATCC 6633 was 125 µg/mL and Pseudomonas aeruginosa ATCC 27853 was 250 µg/mL. The treatment with crescent concentrations of frog skin secretion increased the crystal violet uptake by S. aureus ATCC 25923 cells, suggesting an action on the cell plasma membrane. The results demonstrated that the skin secretion of P. azurea presents antibacterial activity and merit further investigations to characterize the bioactive molecules.

https://doi.org/10.15517/rbt.v67i1.33280 957 downloads

Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley
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Vieira, Daniel Amorim

; Mesquita, Alessandro Carlos

; Marinho, Lígia Borges

; Souza, Vanuza de

; Aidar, Saulo de Tarso

; Carvalho, Marília Mickaele Pinheiro

Acta Scientiarum. Agronomy

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2019, Volume 41 elocation e42686

Resumo: En | Texto: En | PDF: En

ABSTRACT. The current scenario of increased water scarcity is due to climate change and directly affects food production. It is thus necessary to develop strategies to mitigate the impacts of low water availability. Therefore, the goal of the present study is to evaluate the physiological behaviour of melon cultivars under water stress. The experiment was conducted in a protected environment in the experimental Submedium region of the São Francisco River Valley in the period ranging from October to December. In this study, we used the melon cultivars 'Amarelo' and 'Piel de Sapo'. The experiment was conducted in a randomized block design with three replicates that were subdivided into plots, where the plots were comprised of four irrigation rates (50, 75, 100, and 125% of crop evapotranspiration - CET), subplots were comprised of the two melon cultivars, and sub-subplots were comprised of samplings for physiological analyses (15, 30, and 45 days after transplanting). The parameters evaluated were stomatal conductance, transpiration, net photosynthesis, relationship CI/CA, and accumulated dry matter. Water stress reduced the stomatal conductance, transpiration, net photosynthesis, CI/CA, and accumulated dry matter. 'Piel de Sapo' showed a higher photosynthetic adjustment than 'Amarelo' melon due to the gas exchange behaviour of the former, and it was, therefore, more tolerant to water stress.

https://doi.org/10.4025/actasciagron.v41i1.42686 430 downloads

Síntese e avaliação da atividade antimalárica de compostos derivados da curcumina
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Gomes, Patrícia Ramos

; Miguel, Fábio Balbino

; Oliveira, Michael Éder de

; Ferreira, Vanessa Viana

; Guimarães, Daniel Silqueira Martins

; Lima, Aline Brito de

; Barbosa, Camila de Souza

; Oliveira, Mariana Amorim de

; Almeida, Mauro Vieira de

; Viana, Gustavo Henrique Ribeiro

; Couri, Mara Rubia Costa

; Varotti, Fernando de Pilla

Química Nova

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Jun 2014, Volume 37 Nº 3 Páginas 492 - 496

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

One of the main challenges in the development of new antimalarial drugs is to achieve a viable lead candidate with good pharmacokinetic properties. Curcumin has a broad range of biological activities, including antimalarial activity. Herein, we report the antimalarial activity of six curcumin derivatives (6-12) and an initial analysis of their pharmacokinetic properties. Five compounds have demonstrated potent activity against the P. falciparum in vitro (IC50 values ranging from 1.7 to 15.2 µg mL-1), with moderate or low cytotoxicity against the HeLa cell line. The substitution of the carbonyl group in 6 by a 2,4-dinitrophenylhydrazone group (to afford 11) increases the Selective Index. These preliminary results indicate curcumin derivatives as potential antimalarial compounds.

https://doi.org/10.5935/0100-4042.20140075 4613 downloads

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