Tannins from mimosoid legumes of Texas and Mexico

Readel, Karin; Seigler, David S.; Hwang, Kao; Keesy, June; Seilheimer, Susan

doi:10.1007/bf02864559

Cited by 26 publications

(18 citation statements)

References 29 publications

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“…In recent years, there have been studies on the chemical components of several Acacia species (Lee et al 2000;Readel et al 2001;Seo et al 2002). Acacia is the second largest genus in the subfamily Mimosoideae comprising more than 1,200 species (Harden 1991) and occur in almost all habitat types.…”

Section: In the Genus Acaciamentioning

confidence: 99%

A review of acacic acid-type saponins from Leguminosae-Mimosoideae as potent cytotoxic and apoptosis inducing agents

et al. 2011

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Section: In the Genus Acaciamentioning

confidence: 99%

A review of acacic acid-type saponins from Leguminosae-Mimosoideae as potent cytotoxic and apoptosis inducing agents

et al. 2011

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“…All extractions were performed in triplicate. Total phenolic compounds present in the extracts were analyzed using the FolinCiocalteau method, and total tannins assayed by the casein precipitation technique (Folin;Ciocalteau, 1927;Seigler et al, 1986;Mueller-Harvey, 2001;Readel et al, 2001;Queiroz et al, 2002). The Folin-Ciocalteau method employed in this study to measure total phenolic compounds consisted of adding 0.25-0.5 mL of the extract to 75 mL of distilled water, 5 mL of the FolinCiocalteau reagent (in aqueous solution at 10% -v/v), 10 mL of aqueous sodium carbonate (0.75% -m/v), and then completing the fi nal volume to 100 mL with distilled water.…”

Section: Preparation Of Extracts and Quantifi Cation Of Phenol And Tamentioning

confidence: 99%

The effects of seasonal climate changes in the caatinga on tannin levels in Myracrodruon urundeuva (Engl.) Fr. All. and Anadenanthera colubrina (Vell.) Brenan

Monteiro¹,

Albuquerque²,

Neto³

et al. 2006

Rev. bras. farmacogn.

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Unitermos: Florestas secas, Folin-Ciocalteau, plantas medicinais, semi-árido. ABSTRACT:The infl uence of seasonal climatic changes on tannin concentrations was examined in two caatinga (semi-arid) plant species (Myracrodruon urundeuva (Engl.) Fr. All. and Anadenanthera colubrina (Vell.) Brenan). The Folin-Ciocalteau method was used to quantify total phenols, and the casein precipitation method was used for tannins. In general, there is a close relationship between tannin levels and rainfall, although species seem to adopt different strategies of tannin compound production in response to periods of drought and rainfall in the caatinga.Keywords: Dry forest, Folin-Ciocalteau, medicinal plant, semi-arid. INTRODUCTIONIt is well documented that some ecological variables can quantitatively and qualitatively affect tannin production in plants (Hatano et al., 1986;Teixeira et al., 1990;Furlan et al., 1999;Simon et al., 1999;Salminen et al., 2001;Paiva et al., 2002). Seasonal changes, for example, alter plant metabolism and, consequently, biosynthetic pathways (Hatano et al., 1986;Salminen et al., 2001). Periods of high temperatures are known to increase the concentration of phenolic compounds in many plants. Species of Lotus, for example, demonstrate seasonal variations in tannin concentration (Gebrehiwot et al., 2002), which have been shown to be signifi cantly higher during the spring and summer. The same response was seen with Alnus rubra Bong (González-Hernández et al., 2000). Comparisons between plants growing in tropical sub-humid and tropical semi-arid regions of Africa have demonstrated that total phenols levels increase in regions with more severe climates and with less available humidity (Makkar; Becker, 1998).In Brazil, only a limited number of studies have examined the infl uence of environmental variables on tannin production, and most of these have focused on plant defenses in areas of cerrado (savannah) and Atlantic Coastal Forest vegetation (Pais;Varanda, 2003;Pansera et al., 2003;Yariwake et al., 2005). Fewer studies have been undertaken in the caatinga yet and it certainly remains the most incompletely studied Brazilian biome. The caatinga is also the least protected region in Brazil, with less than 2 % of its lands included within any type of conservation area. Research programs in this semiarid region are therefore necessary, especially in light of the rapid alteration of this biome, and substitution of the native vegetation even before it can be effectively studied (Fernandes, 2002; Giullieti et al., 2002;Castelletti et al., 2003).In the present work, the tannin levels of two caatinga medicinal plants, Myracrodruon urundeuva (Engl.) Fr. All. and Anadenanthera colubrina (Vell.) Brenan, were quantifi ed and compared with local seasonal rainfall data. Studies which increase our understanding of the behavior of caatinga plants are extremely important at this moment for conservation and sustainable. Management strategies are needed to protect and preserve many semi-arid species threatened with extinction...

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“…Foram realizadas cinco extrações sucessivas até o início da fervura, sendo o procedimento realizado em triplicata. As análises dos extratos foram realizadas para determinação de fenóis totais pelo método Folin-Ciocalteau e os taninos totais, pelo método da precipitação da caseína (FOLIN e CIOCALTEAU, 1927;MUELLER-HARVEY, 2001;QUEIROZ et al, 2002;SEIGLER et al, 1986;READEL et al, 2001). Alterações no método foram inseridas visando à adequação aos teores de compostos fenólicos e taninos encontrados em cada espécie.…”

Section: Preparação Dos Extratos E Quantificação Dos Fenóis E Taninosunclassified

Teor de taninos em três espécies medicinais arbóreas simpátricas da caatinga

et al. 2005

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RESUMO -O teor de taninos em três espécies medicinais do semi-árido do Nordeste do Brasil foi determinado. A partir de amostras das cascas do caule e folhas de 10 indivíduos de Anadenanthera colubrina (Vell.) Brenam, Myracrodruon urundeuva (Engl.) Fr. All. e Caesalpinia pyramidalis Tul., os teores de fenóis totais e taninos foram determinados em extratos metanólicos 80% pelo método de Folin-Ciocalteau, seguido do método da precipitação de proteínas. Adicionalmente, testou-se a hipótese de que a concentração de taninos está diretamente relacionada com a altura e diâmetro das plantas. As espécies estudadas apresentaram expressivos teores de extrativos tânicos, e os resultados não ratificaram a hipótese testada.Palavras-chave: Caatinga, taninos, Anadenanthera colubrina, Myracrodruon urundeuva e Caesalpinia pyramidalis. TANNIN CONCENTRATION IN THREE SIMPATRIC MEDICINAL PLANTS FROM CAATINGA VEGETATION INTRODUÇÃOTaninos são compostos secundários, presentes na maioria das plantas, que podem variar de concentração nos tecidos vegetais, dependendo da idade e tamanho da planta, da parte coletada, da época ou, ainda, do local de coleta (TEIXEIRA et al., 1990; SIMON et al.,1999;LARCHER, 2000). No Brasil, várias espécies são pesquisadas por suas propriedades tanantes; entre as principais estão Stryphnodendron adstringens (Martius) Coville, Dimorphandra mollis Benth., Anadenanthera colubrina (Vell.) Brenam, Acacia mearnssi De Wild, Psidium guajava L. e Myracrodruon urundeuva (Engl.) Fr.

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Tannins from mimosoid legumes of Texas and Mexico

Cited by 26 publications

References 29 publications

A review of acacic acid-type saponins from Leguminosae-Mimosoideae as potent cytotoxic and apoptosis inducing agents

A review of acacic acid-type saponins from Leguminosae-Mimosoideae as potent cytotoxic and apoptosis inducing agents

The effects of seasonal climate changes in the caatinga on tannin levels in Myracrodruon urundeuva (Engl.) Fr. All. and Anadenanthera colubrina (Vell.) Brenan

Teor de taninos em três espécies medicinais arbóreas simpátricas da caatinga

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