Hallazgos anatómicos e histoquímicos de cáscaras de tubérculos Andinos
Potencial para su aplicación nutracéutica
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Oxalis tuberosa, Solanum tuberosum subsp. andigena, Ullucus tuberosus, nutraceutical potential, natural productsResumen
El presente estudio se centró en caracterizar la anatomía y la distribución histoquímica de metabolitos bioactivos en las cáscaras de ocho tubérculos andinos, así como en evaluar el potencial de sus extractos para favorecer el desarrollo de la bacteria probiótica Lactobacillus acidophilus, vislumbrando sus potenciales aplicaciones. Se realizó un análisis comparativo de las cáscaras de Ullucus tuberosus Caldas (Basellaceae), de dos variedades de Oxalis tuberosa Mol. (Oxalidaceae) y de cinco variedades de Solanum tuberosum L. subsp. andigena (Solanaceae), obtenidas en mercados tradicionales de la Puna argentina. Se evaluaron extractos acuosos, etanólicos y acetato de etilo por su capacidad para promover la formación de biofilm y el crecimiento de L. acidophilus La-14 (SD5212). Las cáscaras de los tubérculos analizados presentaron una cutícula gruesa, epidermis uniestratificada y parénquima cortical amilífero. En O. tuberosa y U. tuberosus, el sistema vascular consistió en haces colaterales abiertos; mientras que S. tuberosum subsp. andigena mostró una estela anfiflóica modificada con abundante parénquima de reserva. Los idioblastos con pigmentos, como antocianinas y carotenoides, se asociaron con la coloración de los tubérculos. Los análisis histoquímicos evidenciaron compuestos fenólicos, flavonoides, triterpenos y proteínas almacenadas en tejidos epidérmicos y subepidérmicos. Todos los extractos promovieron la formación del biofilm de la bacteria probiótica, de forma dosis-dependiente. Los resultados sugieren que las cáscaras de tubérculos andinos son una fuente natural de metabolitos de reconocida acción antioxidante y potencial para el desarrollo óptimo del probiótico L. acidophilus La-14 (SD5212) y el diseño futuro de formulaciones nutracéuticas sostenibles.
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