Calidad fisiológica de semillas almacenadas de Eryngium horridum Malme de distintos sitios de la provincia de Entre Ríos
Fecha
2004
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UNR Editora
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El objetivo es evaluar la calidad fisiológica de semillas de E. horridum almacenadas en dos condiciones de temperatura, mediante pruebas de germinación y viabilidad por tetrazolio. Se trabajó con lotes de semillas provenientes de 7 sitios de la provincia de Entre Ríos, Argentina, mantenidas a temperatura ambiente (TA) 11 a 21 ºC- y en heladera frío 4 "1 ºC-, durante 12 y 17 meses momento en que se efectuaron ensayos estándar de germinación con alternancia de temperatura (20-30 ºC) y luz (900 Lux-8 h). Se determinó el número de semillas germinadas, muertas y frescas. Entre los 12 y los 17 meses de almacenamiento ocurrieron cambios significativos en los porcentajes de germinación según la condición, con valores siempre superiores en la condición frío. Se observó una alta proporción de semillas no viables para la condición de conservación a TA vs. frío en ambos ensayos. La conservación de semillas en frío fue efectiva durante 17 meses para mantener la viabilidad de las semillas y la germinación en su máxima expresión. La longevidad de las semillas almacenadas a TA puede superar el año.
The aim is to evaluate, using germination and tetrazolium viability tests, the physiological quality of E. horridum seeds stored under two different temperature conditions. The work was carried out with seed lots from seven different sites in the province of Entre Ríos, Argentina and they were kept under environment conditions, 11º C to 21ºC, and in fridge conditions, 4 "1º C, during 12 and 17 months respectively when standard germination tests were performed with temperature (20-30 ºC) and light (900 Lux-8 h) alternation. The number of dead, fresh and germinated seeds was determined. Significant changes occurred in germination percentages according to the condition after 12 and 17 month storage being the higher values under the cold condition. A high proportion of non viable seeds for storing under environment condition vs. cold condition were observed in both trials. Cold seed storing was effective during 17 months to keep seed viability and germination in its higher capacity. Longevity of seeds stored under environment condition can be longer than a year time.
The aim is to evaluate, using germination and tetrazolium viability tests, the physiological quality of E. horridum seeds stored under two different temperature conditions. The work was carried out with seed lots from seven different sites in the province of Entre Ríos, Argentina and they were kept under environment conditions, 11º C to 21ºC, and in fridge conditions, 4 "1º C, during 12 and 17 months respectively when standard germination tests were performed with temperature (20-30 ºC) and light (900 Lux-8 h) alternation. The number of dead, fresh and germinated seeds was determined. Significant changes occurred in germination percentages according to the condition after 12 and 17 month storage being the higher values under the cold condition. A high proportion of non viable seeds for storing under environment condition vs. cold condition were observed in both trials. Cold seed storing was effective during 17 months to keep seed viability and germination in its higher capacity. Longevity of seeds stored under environment condition can be longer than a year time.
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longevidad, viabilidad, tetrazolio, longevity, viability, tetrazolium