Efeitos de embalagens e ambientes na qualidade fisiológica de sementes de Mimosa tenuiflora (Willd.) Poir. Durante o armazenamento.

Abstract

Storage is a fundamental practice in controlling seed physiological quality, as it can preserve seed viability and vigor for a longer period. Therefore, the objective of this study was to evaluate the physiological quality of black jurema (Mimosa tenuiflora (Willd.) Poir.) seeds previously selected in the Cariri region of Paraíba, using different packaging and storage environments. The study was conducted at the Laboratory of Plant Anatomy and Physiology (LAFIV/CDSA/UFCG). The seeds were collected from matrices located at the Ligeiro de Baixo site in the municipality of Serra Branca, Paraíba, and taken to the laboratory, where they were homogenized and packaged in different containers (Kraft paper bag and glass) and stored in laboratory environments (without temperature and relative humidity control) and freezer (temperature and humidity controlled conditions) for a period of 120 days. During 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 the environments and packaging influenced the reduction of the studied parameters during storage. For emergence data, IVE, seedling length, and seedling dry mass, glass packaging and the freezer environment promoted better seed conservation, with values of 65%, 1.7 cm, 10.7 cm, and 6.9 mg after 120 days of storage, respectively. However, the reduction was more pronounced when the seeds were packaged in paper packaging and stored in a laboratory environment. Therefore, it was found that the seeds of the studied species are orthodox, and that packaging in glass packaging in a freezer environment (controlled temperature conditions) promoted the best results, without significant losses in seedling emergence in the municipality of Sumé, Paraíba.