The study of physiological and biochemical responses of leaf reddening during overwintering in broadleaf evergreens has theoretical significance to reveal the coloration mechanism and can also provide practical guide for maintaining the green landscape in northern China. In the present study,we measured the contents of pigments and their distributions,the related indexes of reactive oxygen species( ROS) in five different leaf color phenotypes: Green( GG),Green Brown( GB),Brown( BB),Red Brown( RB)and Red( RR...