ADVANCES IN RESEARCHES ON MOLECULAR BIOLOGY OF PLANT COLD RESISTANCE Regulation of Exogenous Ethylene on Ca2+- ATPase Activity and Lipid Peroxidation of Microsomal Membrane in Strawberry Fruit Regulation of Exogenous Ethylene on Ca2+- ATPase Activity and Lipid Peroxidation of Microsomal Membrane in Strawberry Fruit