Chemical compositions and herbicidal (phytotoxic) activity of essential oils of three Copaifera species (Leguminosae-Caesalpinoideae) from Amazon-Brazil

Gurgel, Ely Simone Cajueiro; Oliveira, Mozaniel Santana de; Souza, Marília Caldas; Silva, Sebastião Gomes da; Mendonça, Maria Sílvia de; Filho, A. P. da S. Souza

doi:10.1016/j.indcrop.2019.111850

Cited by 32 publications

(19 citation statements)

References 55 publications

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“…The chemical composition of the essential oils was evaluated by gas chromatography/mass spectrometry (GC/MS) according to the methodologies by [ 53 , 54 ], using a Shimadzu QP-2010 plus system under the following conditions: silica capillary column Rtx-5MS (30 m × 0.25 mm, 0.25 μm film thickness); program temperature of 60–240 °C at 3 °C/min; injector temperature of 250 °C; helium as carrier gas (linear velocity of 32 cm/s, measured at 100 °C); splitless injection (1 μL of a 2:1000 hexane solution). Ionization was obtained by electronic impact technique at 70 eV, and the temperature of the ion source and other parts was set at 200 °C.…”

Section: Methodsmentioning

confidence: 99%

Chemical Composition, Antimicrobial Properties of Siparuna guianensis Essential Oil and a Molecular Docking and Dynamics Molecular Study of its Major Chemical Constituent

et al. 2020

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The essential oil of Siparuna guianensis was obtained by hydrodistillation. The identification of the chemical compounds was performed by gas chromatography coupled with mass spectrometry (GC/MS). Antimicrobial activity was investigated for four microorganisms: Streptococcus mutans (ATCC 3440), Enterococcus faecalis (ATCC 4083), Escherichia coli (ATCC 25922), and Candida albicans (ATCC-10231). The studies of doping and molecular dynamics were performed with the molecule that presented the highest concentration of drug–target proteins, 1IYL (C. albicans), 1C14 (E. coli), 2WE5 (E. faecalis), and 4TQX (S. mutans). The main compounds identified were: Curzerene (7.1%), γ-Elemene (7.04%), Germacrene D (7.61%), trans-β-Elemenone (11.78%), and Atractylone (18.65%). Gram positive bacteria and fungi were the most susceptible to the effects of the essential oil. The results obtained in the simulation showed that the major compound atractylone interacts with the catalytic sites of the target proteins, forming energetically favourable systems and remaining stable during the period of molecular dynamics.

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Section: Methodsmentioning

confidence: 99%

Chemical Composition, Antimicrobial Properties of Siparuna guianensis Essential Oil and a Molecular Docking and Dynamics Molecular Study of its Major Chemical Constituent

et al. 2020

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“…Um total de 72,89% dos componentes presentes no óleo de copaíba foram identificados sendo a maioria sesquiterpenos (Tabela 1). Tratando-se de um óleo comercial, não obtém-se informações de como foi realizada a extração, Gurgel et al 2019 atribui as variações na capacidade inibitória e na variação das classes de terpenos às fontes dos óleos (folhas e caules) e não às espécies das quais foram extraídas.…”

Section: Resultsunclassified

“…Além disso, o efeito fitotóxico promovido pelos óleos são mais acentuados em sementes oriundas de lotes de baixo vigor (Domene et al, 2016). Gurgel et al (2019) apontaram efeito alelopático de óleos de diferentes espécies de Copaíba (Copaifera sp.) sobre a germinação das sementes de Mimosa pudica L. (17,3%) e Senna obtusifolia (L.), (18%).…”

Section: Resultsunclassified

Atividade alelopática do óleo de copaíba (Copaifera langsdorffii Desf) na qualidade das sementes de tomate

Cruz

Pereira

Silva

et al. 2021

RSD

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As atividades alelopática de óleos atuam diretamente em processos de germinação e crescimento de plântulas, afetando o desenvolvimento inicial, uma vez que a constituição e a classe a que pertencem tais óleos estão diretamente relacionados aos efeitos nocivos às sementes. O presente trabalho teve como objetivo analisar o efeito alelopático do óleo de copaíba sobre a germinação de sementes e desenvolvimento inicial de plântulas de tomate. As sementes de dois lotes foram colocadas para germinar em substrato umedecido com 0; 0,01; 0,05; 0,10; 0,15 e 0,20% de óleo de copaíba. Foram utilizadas 200 sementes de tomate por tratamento, distribuídas em quatro repetições. Avaliou-se a germinação, o índice de velocidade de germinação e o comprimento de plântulas. A porcentagem de germinação e o índice de velocidade de germinação das sementes dos dois lotes não diferiram entre si, no entanto sementes do lote 1 responderam de forma positiva à aplicação do óleo de copaíba. Em relação ao comprimento de plântulas, a concentração de 0,01% foi superior às demais. No que se refere ao lote 2, a ausência do óleo de copaíba proporcionou um maior comprimento de plântulas. As concentrações de óleo de copaíba não reduziram a porcentagem de germinação, índice de velocidade de germinação de maneira positiva. Para a observação do efeito alélopatico do óleo de copaíba em sementes de tomate, recomenda-se a utilização de concentrações superiores às que foram utilizadas no presente estudo.

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“…Multivariate analysis was performed according to a reported procedure, [63–65] using the Minitab® software. The variables used were the chemical compounds of the essential oil and aroma of Bignonia nocturna leaves and stems (≥0.1 %) obtained by HD, SD and SDE, thus forming a matrix of 12 (samples)×10 (variables).…”

Section: Methodsmentioning

confidence: 99%

Extraction Yield, Chemical Composition, Preliminary Toxicity of Bignonia nocturna (Bignoniaceae) Essential Oil and in Silico Evaluation of the Interaction

Oliveira

Silva

Freitas

et al. 2021

Chemistry & Biodiversity

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Bignonia nocturna (Bignoniaceae) is a plant used for medicinal purposes by the Amazonian indigenous peoples. To date, there have been no reported studies on its toxicity. The present study aimed to evaluate the chemical composition of essential oils obtained from Bignonia nocturna by different extraction techniques. In addition, an in silico study of the molecular interactions was performed using molecular docking and molecular dynamics. The extractions were carried out by hydrodistillation, simultaneous distillation‐extraction, and steam distillation, using samples collected from the Amazon in summer and winter. The chemical composition was analyzed by GC/FID and GC/MS, and the cytotoxic activity in Artemia salina Leach was evaluated. The maximum yield (1.38 % w/w) was obtained by hydrodistillation. The results indicated that benzaldehyde predominated in all the fractions of both the volatile concentrate and the essential oils. In addition, the oil proved to be highly toxic to Artemia salina. The computer simulation results indicated that benzaldehyde strongly interacts with acetylcholinesterase, which is the likely interaction mechanism responsible for the cytotoxicity.

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Chemical compositions and herbicidal (phytotoxic) activity of essential oils of three Copaifera species (Leguminosae-Caesalpinoideae) from Amazon-Brazil

Cited by 32 publications

References 55 publications

Chemical Composition, Antimicrobial Properties of Siparuna guianensis Essential Oil and a Molecular Docking and Dynamics Molecular Study of its Major Chemical Constituent

Chemical Composition, Antimicrobial Properties of Siparuna guianensis Essential Oil and a Molecular Docking and Dynamics Molecular Study of its Major Chemical Constituent

Atividade alelopática do óleo de copaíba (Copaifera langsdorffii Desf) na qualidade das sementes de tomate

Extraction Yield, Chemical Composition, Preliminary Toxicity of Bignonia nocturna (Bignoniaceae) Essential Oil and in Silico Evaluation of the Interaction

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