Respuesta germinativa de tres especies de Limonium a la concentración de yeso y cloruro sódico
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2018-02-23
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Jaén: Universidad de Jaén
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[ES] El género Limonium pertenece a la familia Plumbaginaceae, en esta familia se encuentran las especies L. supinum, L. delicatulum y L. minus. Se ha estudiado la influencia de la salinidad en la germinación de semillas para estas 3 especies; para ello se han hecho dos ensayos. En el primer ensayo se utilizaron concentraciones de NaCl (0, 50, 100, 150, 200, 400 y 600 mM) y yeso (0.5, 1, 2.4 g/L) con un fotoperiodo de 12h luz y 12h oscuridad con una temperatura de 20-10 ºC. El porcentaje final de germinación se ve afectado por la salinidad: a bajas concentraciones la germinación es de casi un 100%, mientras que al aumentar la salinidad la germinación disminuye hasta ser nula (600mM). La salinidad también afecta al tiempo medio de germinación, aumentando al elevar las concentraciones salinas. Por otra parte, la tasa de germinación más elevada se da a bajas concentraciones de salinidad, disminuyendo al aumentar las mismas. Después se comprobó que, las semillas no germinadas en altas concentraciones de sal, recuperaron por completo la capacidad germinativa al ser traspasadas a agua destilada. Por último, el efecto del yeso en la germinación no tuvo diferencias significativas y las semillas se comportaron al igual que las semillas de las concentraciones salinas más bajas.
[EN] The genus Limonium belongs to the family Plumbaginaceae, in this family are the species L. supinum, L. delicatulum and L. minus. The influence of salinity on seed germination has been studied for these 3 species; Two tests have been carried out. In the first experiment, NaCl concentrations (0, 50, 100, 150, 200, 400 and 600 mM) and gypsum (0.5, 1, 2.4 g / L) were used with a photoperiod of 12h light and 12h darkness with a temperature of 20-10 ° C. The final percentage of germination is affected by salinity: at low concentrations the germination is almost 100%, while with increasing salinity the germination decreases to zero (600mM). Salinity also affects the average germination time, increasing as saline concentrations rise. On the other hand, the highest germination rate occurs at low salinity concentrations, decreasing with increasing salinity. Afterwards, it was verified that, the seeds not germinated in high concentrations of salt, recovered completely the germinative capacity when being transferred to distilled water. Finally, the effect of gypsum on the germination did not have significant differences and the seeds behaved like the seeds of the lower saline concentrations.
[EN] The genus Limonium belongs to the family Plumbaginaceae, in this family are the species L. supinum, L. delicatulum and L. minus. The influence of salinity on seed germination has been studied for these 3 species; Two tests have been carried out. In the first experiment, NaCl concentrations (0, 50, 100, 150, 200, 400 and 600 mM) and gypsum (0.5, 1, 2.4 g / L) were used with a photoperiod of 12h light and 12h darkness with a temperature of 20-10 ° C. The final percentage of germination is affected by salinity: at low concentrations the germination is almost 100%, while with increasing salinity the germination decreases to zero (600mM). Salinity also affects the average germination time, increasing as saline concentrations rise. On the other hand, the highest germination rate occurs at low salinity concentrations, decreasing with increasing salinity. Afterwards, it was verified that, the seeds not germinated in high concentrations of salt, recovered completely the germinative capacity when being transferred to distilled water. Finally, the effect of gypsum on the germination did not have significant differences and the seeds behaved like the seeds of the lower saline concentrations.