Relationship between Lipoxygenase and ABA and JA in Wounded Signal Transduction of Heathy Populus Seedlings Phospholipase D and Lipoxygenase of Young Loquat Fruits in Response to Low Temperature Stress Effects of calcium infiltration treatment on enzymatic browning of red Fuji apples Effect of Exogenous Salicylic Acid on Some Parameters of Cell Membrane in Postharvest Prunus persica Fruits