Research on Physiological Characteristics of Salt Resistance in Iris lactea var.chinensis Futher Study of the Mefluidide-lnduced Chilling Tolerance in Corn Seedlings Comparative Study on Physiological Characteristics Between an Invasive Plant Spartina alterniflora and Indigenous Plant Phragmites communis Effects of ABA on Senescence and Cellulase Activity of Detached Rice Leaves THE EFFECT OF MERCURY ON MEMBRANE-LIPID PEROXIDATION AND ENDOGENOUS PROTECTIVE SYSTEM IN MAIZE SEEDLING A mathematical model on procedure of some physiology and biochemical during aging of Chinese Fir seed