Oxidative metabolism altered by plant growth regulators in atemoia seeds (Annona x atemoya Mabb.) ‘Thompson’

Abstract The objective of this work was to validate the enzymatic activity in Annona x atemoyaseeds submitted treatments with plant growth regulators belonging group gibberellins and cytokinins for overcoming dormancy during germination process. Initially, water acquisition curve determined, where two points phase II (72 144 hours) were determined evaluate superoxide dismutase (SOD), peroxidase (POD) catalase (CAT) enzymes atemoya seeds after application regulators. Treatments GA resulted higher SOD enzyme, which may be favored percentage speed comparison control treatment. In cases enzyme presented high activity, other showed opposite, indicates predominantly production superoxides period. POD also has treated gibberellin, suggests interaction ROS process overcoming. cytokinin + gibberellin similar no pattern SOD, CAT that could correlated metabolism observed.