The water content of anhydrobiotic (orthodox) seeds is usually reduced to low values and its metabolism is reduced to a level that viability can be preserved for long periods. In contrast, typical non-anhydrobiotic (recalcitrant) seeds are intolerant to desiccation, possess lower longevity, and need a minimum water level to maintain viability, but the metabolism is still too active leading to a short seed longevity. In the present research "inga" seed embryos were stored in contact with polyethylene glycol 6000 (PEG) solutions, at pre-defined water potential with the objective of improving storability and longevity. Results indicated that germination of embryos kept in PEG solution at -2.4 MPa was higher than 80% after 90 days of storage at 10 ºC, while the germination of embryos kept at distilled water (0 MPa), at the same temperature, was lower than 60%.
osmotic potential; physiological quality; storage
