Contenidos flavonocidos en las hojas de Baccharis Latifolia, según el tipo de hoja, y su dependencia de las propiedades fisicoquímicas de los suelos
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Rev. Bol. Quim
Abstract
Baccharis latifolia, comúnmente conocida como "Chilca", es una planta con una actividad antiinflamatoria reconocida. Parte de su actividad se debe a su contenido de flavonoides, cuya composición cuantitativa en la planta varía según las condiciones ambientales. Este estudio se centra en caracterizar y cuantificar los flavonoides de las hojas de B. latifolia en la estación seca. La cuantificación de los flavonoides totales se realizó por quelación con A1C13 y se midió con espectroscopia UV / Vis con respecto a la luteolina, mediante la comparación de los contenidos totales de flavonoides en hojas apicales, medias y basales, a tres alturas en las laderas de Lluto, La Paz (4187, 4000 y 3825 msnm). A través de este estudio, hemos determinado que las hojas con la mayor concentración de flavonoides son las apicales y que, en la estación seca, no existe una clara correlación entre la altitud y la producción de flavonoides. Además, hemos analizado la correlación entre algunas propiedades fisicoquímicas de los suelos y la producción de flavonoides, determinando, por un lado, que los suelos más ricos en nitrógeno provocan una disminución de la concentración de flavonoides, mientras que el pH, la conductividad eléctrica y el porcentaje de arcilla tienen una relación proporcional directa con la producción de flavonoides, lo que significa que un aumento en estos parámetros implica un aumento en el contenido total de flavonoides y viceversa.
Baccharis latifolia, commonly known as "Chilca", is a plant with a recognized anti-inflammatory activity. Part of its activity is due to its flavonoid contents, whose quantitative composition in the plant varíes according to environmental conditions. This study is focused on characterizing and quantifying flavonoids of B. latifolia leaves in the dry season. The quantification of total flavonoids was done by chelation with A1C1(3) and by measuring with UV/Vis spectroscopy with respect to luteolin, by means of comparing the total flavonoid contents in apical, middle and basal leaves, at three altitudes in the hillsides of Lluto, La Paz (4187, 4000 and 3825 m.a.s.l.). Through this study, we have determined that the leaves with the highest concentration of flavonoids are the apical and that, in the dry season, there is not a clear correlation between the altitude and the production of flavonoids. Additionally, we've analyzed the correlation between some physicochemical properties of soils and the production of flavonoids, determining on the one hand, that nitrogen richer soils provoke a diminishing of concentration of flavonoids, whereas pH, electrical conductivity and the percent of clay have a direct proportional relationship with the production of flavonoids, which means that an increase in these parameters implies an increase in the flavonoid total contents and vice- versa.
Baccharis latifolia, commonly known as "Chilca", is a plant with a recognized anti-inflammatory activity. Part of its activity is due to its flavonoid contents, whose quantitative composition in the plant varíes according to environmental conditions. This study is focused on characterizing and quantifying flavonoids of B. latifolia leaves in the dry season. The quantification of total flavonoids was done by chelation with A1C1(3) and by measuring with UV/Vis spectroscopy with respect to luteolin, by means of comparing the total flavonoid contents in apical, middle and basal leaves, at three altitudes in the hillsides of Lluto, La Paz (4187, 4000 and 3825 m.a.s.l.). Through this study, we have determined that the leaves with the highest concentration of flavonoids are the apical and that, in the dry season, there is not a clear correlation between the altitude and the production of flavonoids. Additionally, we've analyzed the correlation between some physicochemical properties of soils and the production of flavonoids, determining on the one hand, that nitrogen richer soils provoke a diminishing of concentration of flavonoids, whereas pH, electrical conductivity and the percent of clay have a direct proportional relationship with the production of flavonoids, which means that an increase in these parameters implies an increase in the flavonoid total contents and vice- versa.
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Vol. 35, No. 5