Seed viability in storage guabijuzeiro

Abstract

The objective of this study was to evaluate the physiological quality of guabiju fruit tree seeds during 12 months in two conditions. The study was carried out at the Universidade Tecnológica Federal do Paraná - Campus Dois Vizinhos, Paraná State, Brazil. The seeds were obtained of guabiju fruit tree (Myrcianthes pungens). In experiment 1, the completely randomized design with 3 replications and 50 seeds each. The seeds were dried at 25°C and remained at 0, 6, 12, 24, 48, 72, 96, 120, 144 and 168 hours. In experiment 2, the experimental design was a randomized block with factorial 2 x 12 (storage location x storage period), with three replications and 50 seeds each. The seeds were stored in two locations, being at room temperature and controlled temperature of 6°C. The storage periods were: 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300 and 330 days. For both experiments, after each storage period, the seeds were sown in Tetrapak® boxes, using sand as substrate and placed in the greenhouse. At 100 days after sowing, emergence was evaluated (%) and IVE. He kept the moisture content of the seeds of guabijuzeiro above 80%, achieving keep answers 80% viability. In general, it visualizes the guabijuzeiro seeds can be stored for 180 days in low temperature condition and 60 days in natural state, without the total loss of viability and to obtain emergency results exceeding 50%.