Efecto de la exposición a microplásticos sobre la síntesis de azúcares en Brassica oleracea var. italica.
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Date
2025
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Universidad de Concepción
Abstract
La presencia de microplásticos (MPs) se ha estudiado principalmente en ambientes acuáticos, sin embargo, estudios actuales declaran que las concentraciones en ambientes terrestres pueden ser mucho mayores. Por lo tanto, la contaminación por MPs representa una amenaza importante para los agroecosistemas, y en el contexto de la producción de plantas para la alimentación y salud, se necesita más investigación sobre los posibles efectos nocivos de los MPs en la producción agroalimentaria. En este sentido, la presente investigación evaluó la exposición de microplásticos de polietileno de baja densidad (LDPE) en plantas adultas de brócoli (Brassica oleracea var. italica) con un crecimiento de 3 meses, en un suelo artificialmente contaminado, con el objetivo de estudiar los posibles cambios en el contenido de metabolitos primarios, específicamente en azúcares, dentro de un marco de seguridad alimentaria. Los resultados obtenidos indicaron una diferencia significativa entre los parámetros de fluorescencia de la clorofila en presencia de MPs frente al control, además de un aumento del contenido de sacarosa y D-maltosa en presencia de 300 ppm de LDPE en el suelo. Por lo tanto, se puede concluir que la presencia de microplásticos impacta sobre el metabolismo primario de las plantas, representando un factor de estrés, así como una preocupación dentro de un marco de seguridad alimentaria.
The presence of microplastics (MPs) has primarily been studied in aquatic environments; however, recent findings suggest that their concentrations in terrestrial ecosystems may be significantly higher. Consequently, MP pollution poses a serious threat to agroecosystems. In the context of plant production for food and health, further research is needed to understand the potential harmful effects of MPs on agri-food systems. This study evaluated the exposure of low-density polyethylene (LDPE) microplastics in three-month-old broccoli plants (Brassica oleracea var. italica) grown on artificially contaminated soil, aiming to assess possible changes in primary metabolite content—specifically sugars—within a food safety framework. The results showed significant differences in chlorophyll fluorescence parameters between MP-exposed plants and the control group, along with increased levels of sucrose and D-maltose under 300 ppm LDPE conditions. Hence, the presence of microplastics can be considered a stress factor for broccoli plants, as it induced alterations in primary metabolism and, therefore, a concern for food security.
The presence of microplastics (MPs) has primarily been studied in aquatic environments; however, recent findings suggest that their concentrations in terrestrial ecosystems may be significantly higher. Consequently, MP pollution poses a serious threat to agroecosystems. In the context of plant production for food and health, further research is needed to understand the potential harmful effects of MPs on agri-food systems. This study evaluated the exposure of low-density polyethylene (LDPE) microplastics in three-month-old broccoli plants (Brassica oleracea var. italica) grown on artificially contaminated soil, aiming to assess possible changes in primary metabolite content—specifically sugars—within a food safety framework. The results showed significant differences in chlorophyll fluorescence parameters between MP-exposed plants and the control group, along with increased levels of sucrose and D-maltose under 300 ppm LDPE conditions. Hence, the presence of microplastics can be considered a stress factor for broccoli plants, as it induced alterations in primary metabolism and, therefore, a concern for food security.
Description
Tesis presentada para optar al título de Ingeniero/a Agrónomo/a.
Keywords
Brócoli, Metabolitos, Azúcares, Contaminantes