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Drying temperature changes trichome integrity, chemical content and composition of the essential oil of pepper-rosmarin Ciência Rural
Queiroz,Giovanna Alcântara; Silva,Pedro Henrique Lopes; Oliveira,Rosilene Aparecida de; Sodré,George Andrade; Costa,Larissa Corrêa do Bomfim.
ABSTRACT: Medicinal plants are generally commercialized dried. However, temperatures used in their drying processes may interfere with the content and chemical composition of their essential oils. The Lippia origanoides possesses thymol in the essential oil that is stored in glandular trichomes. Thymol is a major component of economic importance in the chemical and pharmaceutical industry. The objective of this study was to evaluate the effect of the drying temperatures of L. origanoides leaves regarding trichome integrity, content, and chemical composition of the essential oil. The experimental design was completely randomized with four treatments defined by oven drying temperatures (40, 50, 60, and 70ºC) and four replications. Essential oil was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lippia origanoides; Medicinal plant; Secretory structures; Drying; Thymol.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001100404
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Pb and Cd on growth, leaf ultrastructure and essential oil yield mint (Mentha arvensis L.) Ciência Rural
Jezler,Caroline Nery; Mangabeira,Pedro Antônio Oliveira; Almeida,Alex-Alan Furtado de; Jesus,Raildo Mota de; Oliveira,Rosilene Aparecida de; Silva,Delmira da Costa; Costa,Larissa Correa do Bomfim.
Contamination of medicinal plants with heavy metals as Pb and Cd can affect the growth and the essential oil production of the plants and represent a risk to those who consume as medicine. This study aimed to evaluate the effects of absorption and localization of Pb and Cd on growth, ultrastructural aspects of leaves and essential oil yield and composition of Mentha arvensis, applied on the soil with increasing concentrations (8, 16, 32, 64 and 128mg kg-1). There was a differential absorption of Pb and Cd by M. arvensis mainly concentrated in the roots. Pb was found in small amounts in the leaves while Cd largely exceeded the safety limit without symptoms of toxicity. The ultrastructural analysis revealed the metal accumulation on vesicles surrounding the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Contamination; Heavy metals; Medicinal plant; Menthol.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300392
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Phytochemical characterization and bioactivity of ethanolic extracts on eggs of citrus blackfly Ciência Rural
Lima,Bruno Marcus Freire Vieira; Oliveira,Rosilene Aparecida de; Santos,Emerson Alves dos; Bittencourt,Maria Aparecida Leão; Santos,Olivia Oliveira dos.
ABSTRACT: The main objectives of this study were to determine the content of secondary metabolites (carotenoids, flavonoids, phenolic compounds, and tannins) of Argemone mexicana L., Ipomoea carnea Jacq. subsp. Fistulosa (Martius ex Choisy), Amorimia rigida (A.Juss.) W. R. Anderson, Ricinus communis L. and Syzygium aromaticum (L.) Merr. & L. M. Perry using UV-VIS spectroscopy, and evaluating the bioactivity of the ethanolic extracts on citrus blackfly eggs (Aleurocanthus woglumi Ashby, 1915). Pera sweet orange leaves infested with citrus blackfly eggs were treated by immersion in 0.5, 1.0, 5.0, and 10%; each replicate consisted of 30 eggs. The experimental design was completely randomized, with seven treatments and four replications. Three immersions...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aleyrodidae; Citrus blackfly; Phytochemical bioprospecting; Ricinus communis; Syzygium aromaticum.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100154
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