%0 Journal Article
%T Evaluation of the oil Produced from lettuce crop cultivated under three irrigation conditions
%A Hassan El-Mallah
%A M.
%A El-Shami
%A S. M.
%J Grasas y Aceites
%D 2012
%I Consejo Superior de Investigaciones Cient¨ªficas
%R 10.3989/gya.023212
%X Three oil lettuce seed samples (lactuca Sativa LS10, LS20, LS30) were cultivated under three irrigation conditions (well, normal and water deficient conditions, after 10, 20 and 30 days respectively) to evaluate their oils and to see to what extent the oil lettuce plant resists draught conditions. The oils extracted from the three seed samples were evaluated by determining eight lipid profiles using HPLC in conjunction with capillary GLC. Lettuce seed oils are characterized by high contents of linoleic and oleic acids. Of the triacyl glycerols determined, those containing linoleyl and oleyl acyles are the major ones. The whole sterol profiles include ¦Â-sitosterol (as major component) followed by 7-stigmasterol, campesterol and 5-stigmasterol, which were found in all the lettuce seed oil samples but with slight differences. Furthermore, sterol patterns of the free and acylated sterols, free and acylated sterylglycosides were determined. It was found that LS30 oil has the highest tocopherol content and ¦Á-tocopherol is the only constituent in all the lettuce seed oil samples. On the other hand, the 2-position in the lettuce seed oil samples is mainly acylated by unsaturated fatty acids (98.6%) namely, oleic and linoleic acids. According to these results, it can be concluded that irrigation conditions do not affect the lipid constituents of the oil and the oil lettuce plant resists draught and its lipid profiles are in agreement with those of conventional vegetable oils. Tres muestras de semillas de lechuga (Lactuca Sativa LS10, LS20, LS30) se cultivaron bajo tres condiciones de riego (bien regado, normal y con deficiencia de agua, despu¨¦s de 10, 20 y 30 d¨ªas, respectivamente) para evaluar sus aceites y ver hasta qu¨¦ punto el aceite de la planta de lechuga resiste las condiciones de riego. Los aceites extra¨ªdos de las tres muestras de semillas se evalu¨® mediante la determinaci¨®n de ocho perfiles de l¨ªpidos usando cromatograf¨ªa l¨ªquida HPLC en conjunci¨®n con la cromatograf¨ªa gaseosa GLC. Los aceites de las semillas de lechuga se caracterizan por un alto contenido en ¨¢cidos linoleico y oleico. De los triglic¨¦ridos determinados, los acilados con linoleico y oleico son los mayoritarios. Los perfiles de esteroles totales incluyen ¦Â-sitosterol (como componente principal), seguido por 7-estigmasterol, campesterol y 5-estigmasterol en todas las muestras de aceite de semillas de lechuga, pero con ligeras diferencias. Adem¨¢s, se determinaron los esteroles libres y acilados, y esterilglicosidos acilados y libres. Se encontr¨® que los aceites de LS30 tiene el m¨¢s alto c
%K Fatty acids
%K Lettuce
%K Lipids
%K Sterols
%K Tocopherols
%K Triacylglycerols
%K ¨¢cidos grasos
%K Esteroles
%K Lechuga
%K L¨ªpidos
%K Tocoferoles
%K Triglic¨¦ridos
%U http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1396/1392