Secondary Plant Metabolism

Vickery, Margaret L.; Vickery, Brian

doi:10.1007/978-1-349-86109-5

Cited by 118 publications

(53 citation statements)

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“…It is most likely that the acetyl-CoA is derived from pyruvate (19). In this pathway, three pyruvate molecules are converted to one isoprene plus four CO2 mol- ecules.…”

Section: Resultsmentioning

confidence: 99%

Fractionation of Carbon Isotopes during Biogenesis of Atmospheric Isoprene

Sharkey¹,

Loreto²,

Delwiche³

et al. 1991

Plant Physiol.

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The stable carbon isotope composition of isoprene emitted from leaves of red oak (Quercus rubra L.) was measured. Despite the importance of isoprene in atmospheric chemistry, little is known about the biogenesis of isoprene (15). One method of studying the biosynthetic pathway of compounds is to measure the fractionation between stable carbon isotopes during biosynthesis. This method can also give information about the size of the precursor pool by feeding precursors of different isotope ratios; in the case of isoprene, we used CO2 assimilated by photosynthesis as the precursor. Carbon assimilated by photosynthesis is fractionated by ribulose-1,5-bisP carboxylase (7). Methods for estimating the isotope composition of carbon recently fixed by photosynthesis using "on line fractionation" have been reported (5).

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“…It is most likely that the acetyl-CoA is derived from pyruvate (19). In this pathway, three pyruvate molecules are converted to one isoprene plus four CO2 mol- ecules.…”

Section: Resultsmentioning

confidence: 99%

Fractionation of Carbon Isotopes during Biogenesis of Atmospheric Isoprene

Sharkey¹,

Loreto²,

Delwiche³

et al. 1991

Plant Physiol.

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“…Elas reduzem a tensão superficial da água, e causam, in vitro, a hemólise de eritrócitos. As saponinas, apesar de muito usadas na indústria farmacêutica, apresentam propriedades tóxicas aos seres humanos (Vickery & Vickery, 1981). Sua ação lipofílica facilita a complexação das saponinas com esteróides, proteínas e fosfolipídeos das membranas celulares alterando a permeabilidade das mesmas, ou causando sua destruição (Schenkel et al, 2001).…”

Section: Fitoquímicaunclassified

Prospecção fitoquímica de Himatanthus drasticus Plumel (Apocynaceae), da mesorregião leste maranhense

Luz

Santos

Lima³

et al. 2014

Rev. bras. plantas med.

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RESUMO: O uso indiscriminado de Himatanthus drasticus (Janaúba) por pequenos caprinocultores no controle de verminose em pequenos ruminantes foi o que motivou a realização do estudo fitoquímico do mesmo. Cascas da janaúba foram coletadas na mesorregião Leste do Maranhão e conduzidas aos laboratórios de Nutrição da Universidade Estadual do Maranhão e de Produtos Naturais da Universidade Federal do Maranhão para a identificação botânica e fitoquímica pela metodologia da Prospecção Preliminar e CCD, realizando testes para as diversas classes de metabólitos secundários. A partir das cascas do vegetal moído e desidratado foi realizado o preparo do extrato bruto (EB). O material foi colocado em uma mistura hidroalcoólica de EtOH: H 2 O (7:3 v:v), e submetido a agitação mecânica esporádica. Os Subextratos foram obtidos a partir do EBHA pelo processo de partição líquido-líquido, ETOH: H 2 O (2:1, v:v). As misturas foram preparadas com os seguintes solventes orgânicos de polaridades crescentes: hexano, acetato de etila e butanol. As análises cromatográficas evidenciaram a presença de grupos de metabólitos secundários no extrato e nos subextratos. As classes de metabólitos secundários que apresentaram maior expressividade na análise de prospecção foram os alcaloides e taninos, enquanto que na analise por CCD foram os flavonoides e terpenos, indicando o potencial da ação farmacológica das cascas de H. drasticus. Palavras-chave:Bioatividade, Fitoterápico, Maranhão.ABSTRACT: Phytochemical screening of Himatanthus drasticus Plumel (Apocynaceae), from the eastern mesoregion of Maranhão, Brazil. The indiscriminate use of the plant Himatanthus drasticus (Janaúba) by small goat farmers to control nematode parasites in small ruminants was the aim of this phytochemical study of the plant. Barks were collected in the eastern mesoregion of the state of Maranhão, Brazil, and sent to the laboratory for botanical and phytochemical identification by the methodology of Preliminary Prospecting and TLC, testing for the various classes of secondary metabolites. From the ground, dehydrated bark, we conducted the preparation of the crude extract (CE). The material was placed in a water-alcohol mixture of EtOH:H2O (7:3 v:v) and subjected to sporadic mechanical agitation. The subextracts were obtained using the HACE process by liquid-liquid partition, ETOH: H2O (2:1, v:v). The mixtures were prepared with organic solvents of increasing polarity, such as hexane, ethyl acetate and butanol. The GC analysis showed the presence of groups of secondary metabolites in the extract and subextractes. The classes of secondary metabolites that showed greater expressiveness are the alkaloids and tannins, when analyzed by prospecting, and flavonoids and terpenes, when analyzed by TLC, and H. drasticus presents elements indicative of pharmacological action.

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“…possesses immune modulatory, analgesic and anti-hepatitis activity [6][7][8][9] . Regarding the chemical composition, different authors examined different aerial parts of Phyllanthus tenellus Roxb [10][11] . Hence the present investigation was to establish the phylogenetic relationship with secondary metabolites and other related compounds of Phyllanthus tenellus of Euphorbiaceae family with 2 other Phyllanthus species i.e.…”

Section: Introductionmentioning

confidence: 99%

A Study on Phytochemical Analysis of Phyllanthus Tenellus Roxb.

Komuraiah¹,

Ragan²

2017

Int. Res. J. Pharm.

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Phyllanthus tenellus is a dominant plant in herbaceous family to appear frequently in various humid environments in Warangal region in Telangana. This plant is used to treat different disease like urolithiasis, inflammatory bowel disease, diabetes and hepatitis B. The present study developed phylogenetic relationship with secondary metabolites and other related compounds of 2 other species of Phyllanthus belongs to family Euphorbiaceae. This investigation was to establish the phylogenetic relationship with secondary metabolites and other related compounds of Phyllanthus tenellus of Euphorbiaceae family. Among them, Phyllanthus tenellus shows unique relationship with secondary metabolites, protein related compound.

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Secondary Plant Metabolism

Cited by 118 publications

References 0 publications

Fractionation of Carbon Isotopes during Biogenesis of Atmospheric Isoprene

Fractionation of Carbon Isotopes during Biogenesis of Atmospheric Isoprene

Prospecção fitoquímica de Himatanthus drasticus Plumel (Apocynaceae), da mesorregião leste maranhense

A Study on Phytochemical Analysis of Phyllanthus Tenellus Roxb.

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