ResumenPara contrarrestar los efectos negativos del proceso degenerativo en semillas, se han empleado diversos tratamientos pregerminativos con éxito parcial en diversas especies, como el quimio acondicionamiento y el hidro acondicionamiento. Para evaluar efecto de la imbibición sobre la calidad fisiológica en semillas de jitomate se utilizaron muestras de 25 semillas envejecidas naturalmente las cuales fueron sometidas al pretratamiento (imbibición en agua destilada con aireación enérgica, 20 h y secado, 18 h) y, para germinar, colocadas en cajas Petri sobre papel sanita, humedecidas con 3.5 ml de agua destilada y colocadas inmediatamente en desecadores de vidrio ajustados a 200, 400 y 600 mm de Hg (vacío), donde fueron conservadas 12 días a 25±1 °C. La germinación total en porcentaje (PG) viabilidad en porcentaje (VIA), peso de materia seca de la parte aérea (PSMA) y de la radícula (PSMR) fue determinada. Hubo diferencias significativas (p< 0.001) para semillas sometidas al pre-tratamiento en todos los parámetros de calidad fisiológica estudiados. Para la condición de vacío si hubo diferencias (p< 0.001) excepto, en el peso de materia seca de la radícula. En la interacción de semillas sometidas al pretratamiento y condiciones de vacío, no se encontraron significancias estadísticas en todas las variables de respuesta. Las semillas con pre-tratamiento AbstractTo counteract the negative effects of the degenerative process in seeds, have employed various pre-germination treatments with partial success in various species, such as chemotherapy conditioning and hydro conditioning. To evaluate effect of imbibition on physiological quality seeds of tomato samples 25 aged seeds were used naturally which were subjected to pretreatment (imbibition in distilled water with vigorous aeration, 20 h and drying, 18 h) and, to germinate, placed in Petri dishes on paper, moistened with 3.5 ml distilled water and placed immediately in glass desiccators adjusted to 200, 400 and 600 mm Hg (vacuum), which were kept 12 days at 25 ± 1 °C. The total germination percentage (PG) viability percentage (VIA), weight of dry matter of the aerial part (PSMA) and the radicle (PSMR) was determined. There were significant differences (p< 0.001) for seeds subjected to pre-treatment in all physiological quality parameters studied. For vacuum condition if there were differences (p< 0.001) except in the dry matter weight of the radicle. In the interaction of seeds subjected to pretreatment and vacuum conditions, no statistical significances were found in all response variables. The seeds with pretreatment started faster germination, seeing reflected in greater VIA, PSMA and PSMR, compared seeds without pretreatment. For vacuum 1766 Rev. Mex. Cienc. Agríc. Vol.7 Núm. 7 28 de septiembre -11 de noviembre, 2016 Claudia Pérez Mendoza et al.iniciaron más rápido la germinación, viéndose reflejado en una mayor VIA, PSMA y PSMR en comparación, a las semillas sin pretratamiento. Para las condiciones de vacío se observó que los mayores valores de PG con 82.9%, V...
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