Waterlogging frequently occurs at germination and seedling stages of peanut in southern China, which leading to the lack of oxygen and change of respiratory pathway of plants. Three peanut cultivars with significantly different tolerance to waterlogging, which had been identified in the field, were chosen as materials in this study. The activity variations of three key respiratory enzymes, succinate dehydrogenase (SDH), alcohol dehydrogenase (ADH) and lactate dehydrogenase (LDH), of the seedlings were measured to clarify the respiratory adaptation mechanisms of the three peanut varieties to wa...