The effects of root zone temperature stress on wheat root antioxidant enzymes activity and seedling growth were studied by water cultivation experiments.The results showed that:(1) Root zone temperature stress can stimulate POD and SOD activity,but with the extent of stress,the activity of SOD turned to restrained,and then,decreased sharply,the MDA content of root was enhanced markedly also.(2) Compared with control,the wheat seedling under high root zone temperature was slim and fragile,and its root length, root dry weight,root total absorbing area,root active absorbing area and root activity decreased sharply.The effect of low root zone temperature stress on above ground of wheat was severer than root.(3) The result also showed that wheat root were not passively tolerant to stress,but actively regulated their physiological metabolic processes,and strengthened their absorbing ability to increase water and nutrient uptake,so that root injury by the environmental stress could be reduced.
root zone temperature stress
antioxidant enzymes activity