Storage of recalcitrant seeds of Eugenia brasiliensis Lam. under control of water availability

Abstract

The reduction in humidity and temperature makes it possible to prolong the storage of seeds, except for those sensitive to desiccation (recalcitrant), which therefore cannot be included in ex situ conservation banks. One way to control the metabolic activity and the movement of water into or out of the seed is to use osmotically active chemicals, such as polyethylene glycol (PEG). In this study, the effect of storage of recalcitrant seeds of Eugenia brasiliensis with water movement control in osmotic medium was evaluated. The results showed that the maintenance of these seeds at water potentials between -1 and -2 MPa allowed increasing the capacity for conserving viability in storage. They also demonstrated that the expansion of this conservation, unlike what occurs with the reduction of temperature, is not necessarily associated with the reduction of metabolic rates.

Biometria De Frutos E Viabilidade De Sementes De Grumixama Após O Armazenamento

“…O armazenamento das sementes por 15 dias não alterou nenhuma das variáveis estudadas, indicando que as sementes de grumixama podem ser armazenadas sem prejuízos em vidros herméticos e em geladeira por este periodo. Cécel;Barbedo (2023) observaram que o armazenamento das sementes de grumixama tanto em vidro hermeticamente fechados como em sacos plásticos perfurados podem ser armazenados por até 120 dias, desde que a temperatura de armazenamento seja de 8 ºC (câmara fria). Segundo este autores, em temperatura de 25 ºC, as sementes têm respiração mais intensa, e devido a isso, o armazenamento em vidro aumenta a concentração de gases letais, inibindo a germinação.…”