According to the classic concept the content of reactive oxygen species (ROS) in cells of plants dependedon the balance between their production and degradation processes controlled by both, enzymatic and metabolic antioxidants.The traditional classification needed renewing, because many investigations demonstrated that many biologically active compounds had ROS controlling properties.This paper aimed to extend the current concept about the potential antioxidant, in particular, of the role of a new coordination compound of cobalt - conimid, on antioxidant enzyme activity of plants under drought. Elucidating the interaction of conimid and the controlling ROS mechanisms during abiotic stress will facilitate the development of strategies to enhance tolerance of plants to drought.