Comparative Analysis of Polysaccharides Structure and Composition in Bitter Melon Inbreed Lines Relationship between the Leaf Structure of Bitter Melon and Resistance to Powdery Mildew Cloning and Sequence Analysis of 1-aminocyclopropane-1-carboxylate (ACC)Oxidase Gene cDNA from Gynoecious Momordica charantia Physiological mechanism in bitter melon infected with powdery mildew fungus Effect of Salicylic Acid On Powdery Mildew Resistance and Antioxidant Enzymes Activity of Bitter Melon Leaf