A New Dioscorea opposite Cultivar‘Longyao 1’ A New Dioscorea opposite Cultivar‘Longyao 1’ Study on secondary metabolites of endophytic fungus Fusarium chlamydosporum from Dioscorea opposite Cloning and Expression Analysis of Actin Gene Fragment from Dioscorea opposite Study on enzyme-assisted extraction of polysaccharides from Dioscorea opposita Antioxidant Activity in Vitro of Glycoprotein from Chinese Yam Antioxidant Activity in Vitro of Glycoprotein from Chinese Yam