Estrés hidríco y compuestos triterpénicos en el olivo (Olea europaea L.) var. Picual
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2017-10-31
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Jaén: Universidad de Jaén
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[ES]En este trabajo se estudia el efecto del estrés hídrico por escasez de agua sobre la concentración de los triterpenos pentaciclicos, en fruto, hoja, tallo, raíz y semilla de olivo (O/ea europaea). Se han tomado muestras de olivo de la variedad Picual situadas en un olivar de secano y de regadío y se ha realizado análisis cromatográfico de dichos compuestos por HPLC-UV/Vis y HPLC-MS. El estudio de la semilla, realizado por primera vez, muestra la existencia de ácido ursólico (UA) y otros dos compuestos no identificados. Como resultado obtenemos que el estrés hídrico por sequía provoca un significativo descenso en el contenido total de MA y OA en fruto y un aumento en la concentración de UO en hoja, manteniéndose sin cambios la concentración del resto de compuestos. Esto implica cambios importantes en la calidad del fruto y un mantenimiento de los niveles de síntesis en el resto de órganos que justifican la importancia de estos compuestos en el metabolismo de la planta.
[EN]In this work the effect of water stress due to water scarcity on the concentration of pentacyclic triterpenes in fruit, leaf, stem, root and olive seed (Olea europaea) is studied. Samples of olive of the Picual variety were collected in a dry and irrigated olive grove and chromatographic analysis of these compounds was performed by HPLC-UV / Vis and HPLC-MS. The study of the seed, first performed, shows the existence of ursolic acid (UA) and two other unidentified compounds. As a result we obtain that the water stress caused by drought causes a significant decrease in the total content of MA and OA in fruit and an increase in the concentration of UO in leaf, keeping unchanged the concentration of the rest of compounds. This implies important changes in the quality of the fruit and maintenance of the levels of synthesis in the rest of organs that justify the importance of these compounds in the metabolism of the plant.
[EN]In this work the effect of water stress due to water scarcity on the concentration of pentacyclic triterpenes in fruit, leaf, stem, root and olive seed (Olea europaea) is studied. Samples of olive of the Picual variety were collected in a dry and irrigated olive grove and chromatographic analysis of these compounds was performed by HPLC-UV / Vis and HPLC-MS. The study of the seed, first performed, shows the existence of ursolic acid (UA) and two other unidentified compounds. As a result we obtain that the water stress caused by drought causes a significant decrease in the total content of MA and OA in fruit and an increase in the concentration of UO in leaf, keeping unchanged the concentration of the rest of compounds. This implies important changes in the quality of the fruit and maintenance of the levels of synthesis in the rest of organs that justify the importance of these compounds in the metabolism of the plant.