The Effect of Oligochitosan on Active Oxygen Metabolism of Suspension Straw2berry Cells Effects of Oligochitosan on Photosynthetic Parameter of Brassica napus Seedlings under Drought Stress Binding Process of Oligochitosan to Strawberry Cells Study on effect of oligochitosan in promoting intestinal absorption of protoberberine alkaloids in extracts from Corydalis saxicola total alkaloids Cloning and Analysis of BnMPK4, A Novel MAP Kinase Gene Induced by Oligochitosan in Brassica napus The Effect of Oligochitosan on Active Oxygen Metabolism of Suspension Straw2berry Cells Effect of Spraying Oligochitosan on Leaf Senescence,Yield and Quality of Arachis hypogaea on Barren Dryland