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Long-term survival during dry storage or longevity is a pre-requisite to avoid deterioration, leading to loss of vigor. Longevity is routinely evaluated by the ability to germinate after storage. It increases progressively during seed maturation, after the acquisition of desiccation tolerance. However, the capacity to germinate represents only a part of the success of crop establishment. How seed maturation affects the resistance of several traits associated with seedling establishment against deterioration was evaluated during seed filling and post-abscission phase of soybean BRS 284 seeds. New phenological stages between 7.1 and 7.2 were introduced to capture the rapid increase in seed longevity. Germination speed after storage was delayed. This delay increased with maturation from 7.1.3 to dry mature seeds. To avoid the influence of germination, stored seeds with emerged radicle were transferred into darkness for 7 days, after which the length of hypocotyl and root was assessed. The time to 50% loss of elongation capacity of both organs during storage was similar to that of loss of germination. Also, it increased steadily during seed maturation after mass maturity and harvest maturity stages, highlighting the importance of the late phase of seed maturation for building seed vigor.

Late seed maturation improves the preservation of seedling emergence during storage in soybean