Efeitos de embalagens e ambientes na qualidade fisiológica de sementes de Astronium urundeuva (M. Allemão) Engl. durante o armazenamento.

Abstract

The quality of the seeds during storage is considered a parameter of great importance, as it will allow for a slower rate of deterioration. Thus, the objective of the work was to study the physiological quality and storage of mastic seeds (Astronium urundeuva (M. Allemão) Engl., previously selected in the Cariri region of Paraibano. The work was carried out at the Vegetal Anato-physiology Laboratory ( LAFIV). The seeds were collected from matrices located in the municipality Sumé-PB and taken to the laboratory, where they were homogenized, and packaged in different packaging (Kraft paper bag, plastic and glass) and stored in laboratory environments (without control of temperature and relative humidity) and freezer (controlled temperature and humidity conditions), for a period of seven months. In each month of storage, the following parameters were evaluated: water content, emergence, emergence speed index, seedling length and seedling dry mass Thus, it was found that environments and packaging influenced the reduction of the parameters studied throughout storage. For emergency and IVE data, plastic packaging and the freezer environment promoted better seed conservation with values of 40% and 2.35 at 180 days of storage, respectively. For seedling length and dry mass, the glass packaging provided the best results, presenting 4.4cm and 6mg at the end of packaging, respectively. However, the reduction was more pronounced when the seeds were packed in paper packaging and stored in a laboratory environment. In this sense, it was found that the seeds of the studied species are orthodox, and that packaging in PET and glass packaging in a freezer environment (controlled temperature conditions) promoted the best results, without significant losses in seedling emergence.