Antioxidant activity of Paraguayan plant extracts

Velázquez, Elsa; Tournier, Horacio; Buschiazzo, Perla M. de; Saavedra, Gloria; Schinella, Guillermo Raúl

doi:10.1016/s0367-326x(02)00293-9

Cited by 193 publications

(116 citation statements)

References 10 publications

Supporting

Mentioning

102

Contrasting

Unclassified

Order By: Relevance

“…No Brasil, ocorrem principalmente de Pernambuco ao Rio Grande do Sul em diversos tipos de formações vegetais (Carvalho, 1994). Devido à grande dispersão das antimicrobiana (Siddiqui et al, 1995;Guerra et al, 2000) e antioxidante (Velázquez et al, 2003). S. molle possui propriedade antiespasmódica, anti-reumática, emenagoga, antiinflamatória e cicatrizante (Piva, 2002).…”

unclassified

Efeito fungicida dos óleos essenciais de Schinus molle L. e Schinus terebinthifolius Raddi, Anacardiaceae, do Rio Grande do Sul

Santos¹,

Rossato²,

Serafini³

et al. 2010

Rev. bras. farmacogn.

View full text Add to dashboard Cite

RESUMO:Uma das alternativas para reduzir o uso de agrotóxicos pode ser a utilização de óleos essenciais para o controle de doenças e pragas que afetam a produção agrícola. O objetivo do presente estudo foi verificar o efeito fungicida dos óleos essenciais de Schinus molle L. e Schinus terebinthifolius Raddi, espécies nativas amplamente distribuídas na região. Os óleos foram extraídos por hidrodestilação e analisados por cromatografia gasosa. Os fungos fitopatógenos Alternaria spp., Botrytis spp., Colletotrichum spp. e Fusarium spp., foram isolados a partir de gérberas e rosas com sintomas de doença e os ensaios de atividade antifúngica foram realizados através da técnica de difusão em disco e os dados analisados pelo teste de Tukey e Duncan a 5%. Em geral o óleo essencial de S. molle foi efetivo para os quatro fungos testados, nas quatro diluições utilizadas e para todos os tempos avaliados e o óleo essencial de S. terebinthifolius apresenta efeito fungicida mais pronunciado contra Botrytis spp., a partir de testes in vitro.Unitermos: óleos essenciais, Schinus molle., Schinus terebinthifolius, efeito fungicida, α-pineno, sabineno.ABSTRACT: "Antifungal effect of Schinus molle L., Anacardiaceae, and Schinus terebinthifolius Raddi, Anacardiaceae, essential oils of Rio Grande do Sul". One of the alternatives to reduce the use of pesticides may be the use of essential oils to control diseases and pests that affect agricultural production. The purpose of this study was to evaluate the fungicide effect of essential oils of Schinus molle L. and Schinus terebinthifolius Raddi, native species widely distributed in the region. The oils were extracted by hydro distillation and analyzed by gas chromatography. The phytopathogenic fungi Alternaria spp., Botrytis spp., Colletotrichum spp. and Fusarium spp., were isolated from "gerberas" and roses with symptoms of disease and antifungal activity of the tests were carried out by the technique of spreading disk. The data was analyzed by Tukey and Duncan tests to 5%. In general, the essential oil of S. molle was effective for the four fungi tested, for the four dilutions used and for all the times evaluated. The essential oil of S. terebinthifolius presents more pronounced fungicide effect against Botrytis spp., from in vitro tests.

show abstract

unclassified

Efeito fungicida dos óleos essenciais de Schinus molle L. e Schinus terebinthifolius Raddi, Anacardiaceae, do Rio Grande do Sul

Santos¹,

Rossato²,

Serafini³

et al. 2010

Rev. bras. farmacogn.

View full text Add to dashboard Cite

show abstract

“…Phytochemical studies on hexane and ethanol extracts from A. giberti led to the isolation of a new tetracyclic triterpene [(−)-onocera-8, (9)], as well as β-sitosterol (10), sequoyitol (11), trigonelline (12), and uracil (13). In addition, 3-hydroxypropanoate, acetate, and formate were detected by NMR techniques, which suggested that they are derived from a natural, yet undetectable compound of 2-butynedioate (14) (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…10,11 Methanolic extracts of A. giberti protected against enzymatic and non-enzymatic lipid peroxidation in microsomal membranes of rat. 12 The goals of the present study were to investigate the chemical composition of the leaf and stem extracts and the nature of the essential oils from stems and leaves of cultivated A. giberti in Brazil, to correlate its oil composition to those reported in the literature for plants collected in Argentina 10 and Paraguay, 11 and then to obtain information about interspecific variability as a function of provenance by using GC-MS and chemometric analyses as tools for plant identification. Vol.…”

Section: Introductionmentioning

confidence: 99%

Chemical constituents of Aristolochia giberti

Marchesini¹,

Prado²,

Messiano³

et al. 2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Foram isoladas quatorze substâncias de Aristolochia giberti, entre elas, um novo triterpeno, (-)-onocera-8,8'-diol. Além destas, 3-hidróxipropanoato, acetato e formato foram detectados por técnicas de RMN, o que sugere que estas substâncias sejam derivadas do 2-butinodioato, não detectável por RMN de 1 H. As análises dos óleos essenciais de caules e folhas, por CG-EM e quimiometria, mostraram grande similaridade entre as espécies cultivadas no Brasil e aquelas na Argentina, o que permitiu confirmar a identificação da espécie e diferenciar os óleos de acordo com as partes da planta.Fourteen compounds were isolated from Aristolochia giberti. These included a new triterperne, (-)-onocera-8,8'-diol. In addition, 3-hydroxypropanoate, acetate, and formate were detected by NMR techniques, which suggests that they are derivatives from 2-butynedioate, which is not detected by 1 H NMR. GC-MS and chemometric analyses of essential oils from stems and leaves showed great similarity between this cultivated species in Brazil and that in Argentina, which allowed us to confirm the species identity and to differentiate the oils according to the plant parts. IntroductionAristolochia species (Aristolochiaceae) are generally sold at Brazilian markets under their popular names, particularly as "One Thousand Man", and little distinction has been made among the species. They have been mainly used in Brazilian traditional medicine as abortifacients, stomachics, antiophidians, antiasthmatics, and expectorants, and recently in slimming therapies.1,2 Aristolochic acids constitute a class of compounds that are characteristic of the Aristolochia genus. These acids have been associated with Chinese herb nephropathy, which is a kind of severe kidney disease caused by the intake of excessive aristolochic acids.3 Therefore, it is essential, for health safety and quality control of related Brazilian herbal medicines, to know the chemical composition of these species, among them Aristolochia giberti Hook., and to develop efficient methods for species identification.The chemical constituents of Brazilian Aristolochiaceae species, such as lignans, have shown antiplasmodial, 4 antimycobacterial, 5 insecticidal, 6,7 anti-inflammatory, and analgesic activities. Despite the significant number of Brazilian Aristolochia species (around 100), the volatile compounds they contain are known for only a few species. 9 In our previous studies on essential oils from roots of 10 Aristolochia species, we investigated the oil composition and correlated them to morphological groups by GC-MS and chemometric analyses, which could also help in the identification of these species. 9A total of 64 compounds were identified in the analysed essential oils from stems and leaves of A. giberti collected in Argentina and Paraguay, which corresponded to around 77% to 92% of the constituents in the oils.10,11 Methanolic extracts of A. giberti protected against enzymatic and non-enzymatic lipid peroxidation in microsomal membranes of rat. 12The goals of the present study were to in...

show abstract

“…Of relevance is the finding that the galls of G. senegalensis have been shown to contain galloyl quinic esters (Bouchet et al , 1998(Bouchet et al , , 2000 with strong radical scavenging activity (Bouchet et al , 1998). We have screened the free radical scavenging activity of the extract showing antiviral activity using the DPPH method (Velazquez et al ., 2003), and obtained an IC 50 (50% inhibitory concentration) of 0.13 mg/ml, thereby confirming the presence of strong radical scavenging activity in the crude extract (unpublished data). The standards used in this assay were gallic acid (0.57 mg/ml) and quercetin (0.87 mg/ml).…”

Section: Discussionmentioning

confidence: 99%

In ovoinhibition of fowlpoxvirus replication by a gall extract fromGuiera senegalensis

et al. 2005

View full text Add to dashboard Cite

Several field isolates of fowlpoxvirus (FPV) from Burkina Faso, West Africa, were isolated and partly evaluated by molecular analysis. In addition, the in ovo antiviral activity against FPV of a gall extract from Guiera senegalensis was determined. Three viral isolates were obtained from suspected fowlpox cases after passage in embryonating chicken eggs and their poxviral identity confirmed by electron microscopy. All isolates were found to be pathogenic for chicks and all grew well in cell culture. Polymerase chain reaction and sequencing of amplicons revealed sequences identical with those of other FPV strains. The most studied isolate was then employed for use in an antiviral assay. An aqueous acetone extract from the galls of G. senegalensis was found to inhibit both virus-induced pock formation and to reduce viral titre in embryonating chicken eggs. The suggested mechanism of action is the activation of the alternative complement pathway and the inhibition of FPV-induced cholesterogenesis in ovo by constituents of the gall extract.

show abstract

Antioxidant activity of Paraguayan plant extracts

Cited by 193 publications

References 10 publications

Efeito fungicida dos óleos essenciais de Schinus molle L. e Schinus terebinthifolius Raddi, Anacardiaceae, do Rio Grande do Sul

Efeito fungicida dos óleos essenciais de Schinus molle L. e Schinus terebinthifolius Raddi, Anacardiaceae, do Rio Grande do Sul

Chemical constituents of Aristolochia giberti

In ovoinhibition of fowlpoxvirus replication by a gall extract fromGuiera senegalensis

Contact Info

Product

Resources

About