Stratification period, imbibition time in solutions of GA3, H2O and NaClO in the germination of yellow araçá tree

Abstract

In order to achieve success in the insertion of a new crop, such as the araçá tree, it is necessary efficient techniques for the production of quality seedlings. The objective of this study was to evaluate the stratification period, as well as the application of the type of solution composed by GA₃ or NaClO with the immersion time, on the influence of the germination of yellow araçá tree seeds. A DIC experiment was performed in the triple multifactor arrangement [stratification period x type of solution x immersion time in the solution]. Five stratification periods (0, 5, 10, 15, 20 days), five types of immersion solution (none, H2O, NaClO 5%, GA₃ 100 mg L^-1, GA₃ 300 mg L^-1) and three immersion in solution (six, 12 and 24 hours) with four replicates of 100 seeds. Germination, germination velocity index (IVG) and average germination time (TMG) were evaluated. GA₃ show efficient promoter for rapid germination of arachis seeds. Stratification is only recommended for yellow seedlings if not associated with the use of GA₃. The stratification periods may have the vigor of the affected seeds if they increase the soaking times in the solutions.