Changes in the sterol compositions of milk thistle oil (<em>Silybium marianum</em> L.) during seed maturation

S. Harrabi; S. Curtis; F. Hayet; P. M. Mayer

doi:10.3989/gya.0495151

Autores/as

S. Harrabi Biochemistry Department, Faculty of Medicine Tunis, University of Tunis El-Manar
S. Curtis Chemistry Department, University of Ottawa
F. Hayet Biochemistry Department, Faculty of Medicine Tunis, University of Tunis El-Manar
P. M. Mayer Chemistry Department, University of Ottawa

DOI:

https://doi.org/10.3989/gya.0495151

Palabras clave:

Aceite, Cambio de Esteroles, Maduración, Semillas de cardo mariano

Resumen

En este estudio se determinaron la composición de lípidos totales y esteroles durante el desarrollo de semillas de cardo mariano. El contenido de aceite incrementó a un valor máximo de 36±1,7% y posteriormente disminuyó hasta alcanzar un valor de 30,5±0,9% cuando la maduración fue completa. El contenido de esteroles de las semillas de cardo mariano se ve afectado por el grado de maduración de las semillas. En las primeras etapas de la maduración de las semillas el Δ⁷-estigmastenol fué el esterol más abundante, seguido de β-sitosterol. Sin embargo en plena madurez, β-sitosterol fue el esterol predominante (46,50±0,8%). A medida que las semillas se desarrollan las cantidades de campesterol y estigmasterol aumentan, mientras que el contenido Δ⁷-avenasterol disminuye. Se puede concluir que el aceite de semillas de cardo mariano tiene un patrón característico de esteroles en comparación con lo especificado para los aceites de oliva y de maíz. El aceite extraído de las semillas del cardo mariano es rica en fitoesteroles y podría ser utilizado en la preparación de alimentos y en nutrición humana.

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