Constituintes voláteis das folhas e dos galhos de Cinnamomum zeylanicum Blume (Lauraceae)

Lima, Maria da Paz; Zoghbi, Maria das Graças B.; Andrade, Eloísa Helena A.; Silva, Tatiana Maria D.; Fernandes, Carlos Sousa

doi:10.1590/s0044-59672005000300009

Cited by 29 publications

(22 citation statements)

References 10 publications

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“…In contrast, the monoterpenes, while also present in the essential oil of Amazonian trees (e.g. Fidelis et al, 2012;Lima et al, 2005), appear to be dominated by emissions that occur with no storage (e.g. Loreto et al, 1996;Jardine et al, 2015), similar to isoprene emission processes.…”

Section: Diurnal Variation Of Isoprenoid Mixing Ratiosmentioning

confidence: 99%

“…Since some studies have shown that sesquiterpenes are found in the essential oil stored in Amazonian forest trees (e.g. Lima et al, 2005), emissions from these storage structures would not be expected to be light-dependent. In contrast, the monoterpenes, while also present in the essential oil of Amazonian trees (e.g.…”

Section: Diurnal Variation Of Isoprenoid Mixing Ratiosmentioning

confidence: 99%

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Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia

Alves¹,

Jardine²,

Tóta³

et al. 2016

Atmos. Chem. Phys.

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Abstract. Tropical rainforests are an important source of isoprenoid and other volatile organic compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, vertical profiles of mixing ratios of isoprene, total monoterpenes and total sesquiterpenes, were measured within and above the canopy, in a primary rainforest in central Amazonia, using a proton transfer reaction -mass spectrometer (PTR-MS). Fluxes of these compounds from the canopy into the atmosphere were estimated from PTR-MS measurements by using an inverse Lagrangian transport model. Measurements were carried out continuously from September 2010 to January 2011, encompassing the dry and wet seasons. Mixing ratios were higher during the dry (isoprene -2.68 ± 0.9 ppbv, total monoterpenes -0.67 ± 0.3 ppbv; total sesquiterpenes -0.09 ± 0.07 ppbv) than the wet season (isoprene -1.66 ± 0.9 ppbv, total monoterpenes -0.47 ± 0.2 ppbv; total sesquiterpenes -0.03±0.02 ppbv) for all compounds. Ambient air temperature and photosynthetically active radiation (PAR) behaved similarly. Daytime isoprene and total monoterpene mixing ratios were highest within the canopy, rather than near the ground or above the canopy. By comparison, daytime total sesquiterpene mixing ratios were highest near the ground. Daytime fluxes varied significantly between seasons for all compounds. The maximums for isoprene (2.53 ± 0.5 µmol m −2 h −1 ) and total monoterpenes (1.77 ± 0.05 µmol m −2 h −1 ) were observed in the late dry season, whereas the maximum for total sesquiterpenes Published by Copernicus Publications on behalf of the European Geosciences Union. E. G. Alves et al.: Seasonality of isoprenoid emissions from a primary rainforest, Amazoniawas found during the dry-to-wet transition season (0.77 ± 0.1 µmol m −2 h −1 ). These flux estimates suggest that the canopy is the main source of isoprenoids emitted into the atmosphere for all seasons. However, uncertainties in turbulence parameterization near the ground could affect estimates of fluxes that come from the ground. Leaf phenology seemed to be an important driver of seasonal variation of isoprenoid emissions. Although remote sensing observations of changes in leaf area index were used to estimate leaf phenology, MEGAN 2.1 did not fully capture the behavior of seasonal emissions observed in this study. This could be a result of very local effects on the observed emissions, but also suggest that other parameters need to be better determined in biogenic volatile organic compound (BVOC) models. Our results support established findings that seasonality of isoprenoids are driven by seasonal changes in light, temperature and leaf phenology. However, they suggest that leaf phenology and its role on isoprenoid production and emission from tropical plant species needs to be better understood in order to develop mechanistic explanations for seasonal variation in emissions. This also may reduce the uncertainties of model estimates associated with the responses to en...

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Section: Diurnal Variation Of Isoprenoid Mixing Ratiosmentioning

confidence: 99%

Section: Diurnal Variation Of Isoprenoid Mixing Ratiosmentioning

confidence: 99%

Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia

Alves¹,

Jardine²,

Tóta³

et al. 2016

Atmos. Chem. Phys.

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“…Em estudos realizados com outras partes da planta, Lima et al (2005), encontraram 23 constituintes no óleo essencial das folhas de canela, dos quais o eugenol se apresentou como o componente majoritário (60%). No óleo essencial dos galhos foram identificados 36 compostos, com predominância dos monoterpenos -e -pineno (9,9%; 3,5%), -felandreno (9,2%), -cimeno (6,2%), limoneno (7,9%), linalol (10,6%); os sesquiterpenos -copaeno (3,3%), ( )-cariofileno (6,7%), óxido de cariofileno (3,1%) e os alilbenzenos (E)-cinamaldeído (7,8%) e acetato de (E)-cinamila (9,7%).…”

Section: Pesquisas De Singhunclassified

Óleos essenciais de Cymbopogon nardus, Cinnamomum zeylanicum e Zingiber officinale: composição, atividades antioxidante e antibacteriana

Andrade¹,

Cardoso²,

Batista³

et al. 2012

Rev. Ciênc. Agron.

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“…Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa) resultados confirmam atividades antifúngicas (Krebs et al, 1983;Devarajan et al, 2002;Vaughn e Spencer, 2004;Silva et al, 2005 Nas análises da composição química do óleo essencial dessa espécie, também foi evidenciada a presença de benzaldeído e de benzoato de benzila (Lima et al, 2005;Viegas, 2005). As indicações da presença de mandelonitrila e de benzoato de mandelonitrila no óleo essencial, embora muito instáveis, podem estar potencializando o efeito fungitóxico do óleo, devido ao elevado grau de toxicidade desses metabólitos secundários (Darling et al, 2001).…”

Section: Tratamentosunclassified

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

et al. 2010

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RESUMONeste trabalho, avaliou-se a capacidade fungitóxica do óleo essencial de folhas frescas de Tanaecium nocturnum sobre o Aspergillus flavus isolado da castanha-do-brasil, por meio das técnicas de contato e fumigação. Pelos resultados dos bioensaios realizados até 10 dias de incubação, verificou-se que a inibição total do crescimento micelial ocorreu quando se utilizou o óleo essencial nas concentrações de 782 ppm (técnica de contato) e 1000 ppm (técnica de fumigação). Em ambas as técnicas, o óleo essencial inibiu a esporulação a partir da concentração de 500 ppm. Observou-se que nos cinco primeiros dias de incubação não houve diferença significativa nos resultados apresentados pelas duas técnicas estudadas, havendo a partir daí uma redução da atividade do óleo essencial nas concentrações inferiores a 1000 ppm pelo teste de fumigação. A ação fungitóxica do óleo essencial sobre o microrganismo estudado pode ser atribuída à presença do benzaldeído (composto majoritário do óleo essencial estudado), em associação com outros compostos também presentes nesse óleo essencial, tais como; álcool benzílico, benzoato de benzila e mandelonitrila.

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Constituintes voláteis das folhas e dos galhos de Cinnamomum zeylanicum Blume (Lauraceae)

Cited by 29 publications

References 10 publications

Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia

Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia

Óleos essenciais de Cymbopogon nardus, Cinnamomum zeylanicum e Zingiber officinale: composição, atividades antioxidante e antibacteriana

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

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