Resumo

PEREZ MENDOZA, Claudia; CARRILLO CASTANEDA, Guillermo; VIDAL LEZAMA, Eloisa  e  ORTIZ GARCIA, Elizabeth. Imbibition effect in the physiological quality of tomato seeds. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.7, pp.1765-1773. ISSN 2007-0934.

To 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 conditions it was observed that the highest values of PG with 82.9%, VIA of 83.9%, PSMA and PSMR with 0.024 and 0.004 mg were for the treatment VAC 200 compared with treatment VAC 600 recorded lower results in this study. The pre imbibition treatment and in combination with the condition of VAC 200 accentuate differences to ascertain the condition vigor of seed tomato.

Palavras-chave : germination; viability; vigor; weight of dry matter.

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