Mobilização de água e conservação da viabilidade de embriões de sementes recalcitrantes de ingá (Inga vera Willd. subsp. affinis (DC.) T. D. Pennington)

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Abstract

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°C, while the germination of embryos kept at distilled water (0 MPa), at the same temperature, was lower than 60%.

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Andréo, Y., Nakagawa, J., & Barbedo, C. J. (2006). Mobilização de água e conservação da viabilidade de embriões de sementes recalcitrantes de ingá (Inga vera Willd. subsp. affinis (DC.) T. D. Pennington). Revista Brasileira de Botanica, 29(2), 309–318. https://doi.org/10.1590/S0100-84042006000200012

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