Influência do ácido giberélico sobre a germinação de sementes de milho

Abstract

Maize (Zea mays L.) is widely cultivated and consumed in Brazil, as well as in other countries. This culture has great adaptability in different growing environments, so when sowing is carried out, it is preferable that fast germination occur, because the seeds are exposed to pest attack, and can accelerate the deterioration process. The objective of the present work was to evaluate the germination process of maize seeds submitted to different concentrations of gibberellic acid, in order to visualize their influence on the germination of the seeds of this crop. The experiment was carried out at the Laboratory of Plant Physiology of the Federal University of the Southern Frontier - UFSS, Cerro Largo campus. In order to conduct the experiments, we used 7- treatments that refer to different concentrations of gibberellic acid, which vary between 0, 10, 50, 100, 200, 500 and 1000 ppm, with a completely randomized design (DIC). four replicates of 50 seeds, totaling 28 experimental units. The evaluated parameters were percentage of germination, of normal seedlings, abnormal seedlings and dead seeds, also the germination speed index test was performed. The results were submitted to analysis of variance (ANOVA), using the SASM-agri program, posterior, submitted to regression analysis. With the results obtained, it was observed that, in corn seeds, the application of gibberellic acid resulted in the reduction of germination percentage and normal seedlings, increase of abnormal seedlings and dead seeds. For the germination rate index (IVG), the higher the concentration of gibberellic acid the lower the IVG, therefore, it is concluded that the results found do not positively influence the application of gibberellic acid in maize seeds.