Effects of cadmium on total phenolic compounds and flavonoids in Euglena gracilis | Efectos de cadmio en compuestos fenolicos totales y flavonoides de Euglena gracilis

English. In the present study the production of phenolic acids and flavonoid compounds by E. gracilis exposed to two cadmium concentrations (0.02 and 0.14 mM) was evaluated using high-performance liquid chromatography (HPLC). The results showed that E. gracilis exposed to 0.02 mM Cd+2 increased significantly the total content of phenolic compounds (798.46 ± 12.61 ?g GA/g) and total flavonoids (241.34 ± 47.63 ?g QE/g) with respect to the control (137.34 ± 19.80 ?g QE/g DW and 549.00 ± 8.57 ?g GA/g DW, respectively). However, no significant increase in the total content of phenolic compounds (568.54 ± 17.42 ?g GA/g DW) and total flavonoids (141.11 ± 9.36 ?g QE/g DW) were observed in E. gracilis exposed to 0.14 mM Cd+2. Further research is necessary to determine the specific role of flavonoids in E. gracilis exposed to high concentrations of Cd+2.

Spanish; Castilian. En el presente estudio la producción de compuestos fenolicos y flavonoides producidos por E. gracilis expuesto a dos concentraciones de cadmio fue evaluado usando cromatografía liquida de alta precisión (HPLC). Los resultados mostraron que 0.02 mM de Cd+2 incrementaba significativamente el contenido total de compuestos fenolicos (798.46 ± 12.61 ?g GA/g) y flavonoides (241.34 ± 47.63 ?g QE/g) con respecto al control (137.34 ± 19.80 ?g QE/g DW y 549.00 ± 8.57 ?g GA/g DW) respectivamente. Sin embargo, incrementos no significativos en el contenido de compuestos fenolicos (568.54 ± 17.42 ?g GA/g DW) y flavonoides totales (141.11 ± 9.36 ?g QE/g DW) fueron observados en E. gracilis expuestas a 0.14 mM de Cd+2. Futuros estudios son necesarios para determinar la función especifica de los flavonoides en E. gracilis expuesto a altas concentraciones de Cd+2.