Ethanol and hormones in physiological conditioning on germination and seed dormancy of Urochloa humidicola cv. Llanero

Abstract: Seed conditioning improves germination uniformity, speed, and dormancy release. This work aimed the study physiological of Urochloa humidicola cv. Llanero, using two lots dormant seeds conditioned by imbibition with water, commercial bioregulator (auxin, gibberellin - 0.144 mM cytokinin), (0.144 1.44 mM) or 5% ethanol. Germination, dormancy, SOD activity, MDA H2O2 content were evaluated. In both lots, percentage was positively influenced without affecting viability. first, germination, a ethanol, higher; in second, highest from treated concerning control water treatment. The unconditioned presented higher protein lots. first lot non-conditioned second lot, had content. showed activity. related to antioxidation activation. It impossible identify oxidative window which would be signal, releasing germination. any product superior quality than water.