Armazenamento de sementes de pitangueira em diferentes ambientes

Abstract

The Surinam cherry (Eugenia uniflora), fruit crop, which features in its fruit the main organoleptic characteristics marketing. Today is spread mainly via seminiferous, either for selecting seedlings or for use as rootstocks. However, it has seeds with recalcitrant characteristics and needs studies to increase the longevity of the viability of during the storage period. Thus, the aim of this study is to evaluate the viability of Surinam cherry seeds submitted to different storage methods. The experiment will be conducted in UTFPR - Campus Two neighbors, being installed with experimental design of randomized blocks in a factorial 3 x 8 (storage condition x storage periods) with 4 blocks and is considered a block plant, 100 seeds per experimental unit. After extracted the Surinam cherry seeds, they will be kept for 24 hours in temperature reduction of excess moisture. Subsequently, they are separated in three batches, the first being subjected to pre-hydropriming for 24 hours and the second maintained dry, both of which are vacuum packaged, since the third batch is placed in plastic bottles containing in its moistened cotton underwear and sealed in the upper portion with a polyethylene bag and elastic. After each storage period, the seeds were weighed again checking the water content of the seeds, which was obtained by drying 4 samples for 3 days at 105°C. After separation of these batches were conducted with BOD 5°C ± 1°C where they were maintained for 0; 30; 60; 90; 120; 150; 180; 210 days. After these periods the seeds were sown in boxes containing commercial substrate under spacing of 2 x 2 cm and kept in a heated greenhouse (irrigation misting 25 minutes every 3 hours daily, with relative 25°C emperature and humidity of 80%). emergency were evaluated (%), emergency speed index of the same (IVE), and plant development through the length of the aerial part, root, and total number of leaves of the seedlings that germinated, and the mass of matter dry root and shoot. The Surinam cherry seed (E. uniflora) may be stored for up to 180 in a plastic bottle screw cap not in a refrigerated environment, maintaining the viability and vigor of the same.