BIOMETRIC CHARACTERIZATION OF Solanum paniculatum L. SEEDS AND GERMINATIVE PERFORMANCE AFTER DORMANCY OVERCOMING
Keywords:
biometry, germination, jurubebaAbstract
The objective of this study was to perform the biometric characterization of Solanum paniculatum L. seeds, as well as to evaluate the effectiveness of sulfuric acid (H2SO4) in overcoming their dormancy. A completely randomized design with four periods of immersion (5, 10, 15 and 20 min) in concentrated H2SO4 (36 N) + control, with four replications of 25 seeds each was used. The seeds were placed in germitest paper, placed in a gerbox box, moistened and carried to the BOD type germinator with a photoperiod of 12 hours at a temperature of 30 ° C. Germination percentage (G%), germination speed index (IVG), average germination time (TMG) and relative frequency (Fr) were evaluated. A sample of 200 seeds was selected for biometric characterization. Statistical analyzes were performed using the Infostat program. Jurubeba seeds presented average values of length, width, thickness and mass of 3.9; 3.3; 1.3 cm; and 10 mg, respectively. Biometrics data indicate high variability for seed fresh mass. Analysis of variance indicated that all variables were significantly influenced by seed exposure time in H2SO4. The relationship between G%, IVG and exposure time in sulfuric acid was adjusted to a positive quadratic polynomial model, obtaining maximum performance in 11 min, and the TMG to a negative model, with maximum performance in 12 min. When analyzing germination Fr of seeds that were immersed in sulfuric acid, the largest number of germinated seeds in a shorter period occurred in seed samples pretreated with H2SO4 for 10 and 15 min.
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