Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid
Despite the possible influence of tannins on the nutritional value of the forages from Caatinga vegetation, there are few studies that evaluated their tannin concentration. This study was conducted to characterize condensed tannins present in the legumes species Mimosa hostilis (Jurema Preta), Mimosa caesalpinifolia (Sabiá) and Bauhinia cheilantha (Mororó), at three stages of their phenological cycle. The concentration of soluble tannin (ST), bound tannin (BT) and total tannin (TT) were determined using the butanol-HCL method; astringency was by the radial diffusion method, and the monomeric composition of purified tannins by a high-performance liquid chromatograph with delphinidin, cyanidin and pelargonidin as standards. Concentration and astringency of purified condensed tannins, as well as their monomeric composition varied between species, and in some cases among phenological cycles. The values observed were always above the limits considered beneficial for ruminal digestion (i.e. 5%). Jurema Preta presented the highest values (30.98% TT and 22% astringency at full growth stage), and Mororó the lowest (10.38% TT and 14% astringency during fructification). Jurema Preta presented a mean relationship prodelfinidin (PD): procyanidin (PC) of 97:3, which did not vary during the phenological cycle, showing the high astringent capacity of these tannins. Sabiá presented a relationship of 90:20 during full growth and flowering stages, decreasing to 40:50 at fructification. In Mororó the PD:PC relationship was more equilibrated, around 40:50 during full growth and flowering stages, decreasing to 35:60 During fructification. Propelargonidin was not detected or was present at low concentration in the three species.
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Escola Superior de Agricultura "Luiz de Queiroz"
2006
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oai:scielo:S0103-901620060006000022006-12-22Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-aridGuimarães-Beelen,Patrícia MendesBerchielli,Telma TeresinhaBeelen,RogerAraújo Filho,JoãoOliveira,Simone Gisele de proantocyanidin antinutritional factors native species ruminant Despite the possible influence of tannins on the nutritional value of the forages from Caatinga vegetation, there are few studies that evaluated their tannin concentration. This study was conducted to characterize condensed tannins present in the legumes species Mimosa hostilis (Jurema Preta), Mimosa caesalpinifolia (Sabiá) and Bauhinia cheilantha (Mororó), at three stages of their phenological cycle. The concentration of soluble tannin (ST), bound tannin (BT) and total tannin (TT) were determined using the butanol-HCL method; astringency was by the radial diffusion method, and the monomeric composition of purified tannins by a high-performance liquid chromatograph with delphinidin, cyanidin and pelargonidin as standards. Concentration and astringency of purified condensed tannins, as well as their monomeric composition varied between species, and in some cases among phenological cycles. The values observed were always above the limits considered beneficial for ruminal digestion (i.e. 5%). Jurema Preta presented the highest values (30.98% TT and 22% astringency at full growth stage), and Mororó the lowest (10.38% TT and 14% astringency during fructification). Jurema Preta presented a mean relationship prodelfinidin (PD): procyanidin (PC) of 97:3, which did not vary during the phenological cycle, showing the high astringent capacity of these tannins. Sabiá presented a relationship of 90:20 during full growth and flowering stages, decreasing to 40:50 at fructification. In Mororó the PD:PC relationship was more equilibrated, around 40:50 during full growth and flowering stages, decreasing to 35:60 During fructification. Propelargonidin was not detected or was present at low concentration in the three species.info:eu-repo/semantics/openAccessEscola Superior de Agricultura "Luiz de Queiroz"Scientia Agricola v.63 n.6 20062006-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600002en10.1590/S0103-90162006000600002 |
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Guimarães-Beelen,Patrícia Mendes Berchielli,Telma Teresinha Beelen,Roger Araújo Filho,João Oliveira,Simone Gisele de |
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Guimarães-Beelen,Patrícia Mendes Berchielli,Telma Teresinha Beelen,Roger Araújo Filho,João Oliveira,Simone Gisele de Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
author_facet |
Guimarães-Beelen,Patrícia Mendes Berchielli,Telma Teresinha Beelen,Roger Araújo Filho,João Oliveira,Simone Gisele de |
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Guimarães-Beelen,Patrícia Mendes |
title |
Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
title_short |
Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
title_full |
Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
title_fullStr |
Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
title_full_unstemmed |
Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid |
title_sort |
characterization of condensed tannins from native legumes of the brazilian northeastern semi-arid |
description |
Despite the possible influence of tannins on the nutritional value of the forages from Caatinga vegetation, there are few studies that evaluated their tannin concentration. This study was conducted to characterize condensed tannins present in the legumes species Mimosa hostilis (Jurema Preta), Mimosa caesalpinifolia (Sabiá) and Bauhinia cheilantha (Mororó), at three stages of their phenological cycle. The concentration of soluble tannin (ST), bound tannin (BT) and total tannin (TT) were determined using the butanol-HCL method; astringency was by the radial diffusion method, and the monomeric composition of purified tannins by a high-performance liquid chromatograph with delphinidin, cyanidin and pelargonidin as standards. Concentration and astringency of purified condensed tannins, as well as their monomeric composition varied between species, and in some cases among phenological cycles. The values observed were always above the limits considered beneficial for ruminal digestion (i.e. 5%). Jurema Preta presented the highest values (30.98% TT and 22% astringency at full growth stage), and Mororó the lowest (10.38% TT and 14% astringency during fructification). Jurema Preta presented a mean relationship prodelfinidin (PD): procyanidin (PC) of 97:3, which did not vary during the phenological cycle, showing the high astringent capacity of these tannins. Sabiá presented a relationship of 90:20 during full growth and flowering stages, decreasing to 40:50 at fructification. In Mororó the PD:PC relationship was more equilibrated, around 40:50 during full growth and flowering stages, decreasing to 35:60 During fructification. Propelargonidin was not detected or was present at low concentration in the three species. |
publisher |
Escola Superior de Agricultura "Luiz de Queiroz" |
publishDate |
2006 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600002 |
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