Qualidade fisiológica de semente de mamão em função da secagem e do armazenamento

Abstract

Conflicting results are reported in the literature concerning the germination capability of papaya seeds submmitted to long-term storage at low moisture content and temperature levels. This study was undertaken to evaluate the viability of papaya seeds of the UENF-CALIMAN 01 cultivar dried under shade to 12.6% w.b moisture and subsequently dried at 37°C in a cabinet drier to 7.7% w.b. The germination and vigour of these seeds were evaluated after drying and after four and eight months of storage in a sealed, moistureproof container at 15°C. Seed vigour, initially of 46%, increased to 77% after four months of storage. Seed germination after drying to the two moisture levels was 75%, increasing to 87% and declining to 66% after four and eight months of storage, respectively. Results indicated that papaya seeds exhibit signs that prompt their classification as orthodox seeds, which are capable of extending their viability by the simultaneous reduction of mositure content and temperature during storage.