Abstract:Parasitic plants are found throughout the world and encompass a huge diversity of ecological niches, growth habitats and host associations. The one commonality among parasitic angiosperms is their ability to penetrate neighboring plant tissues and to acquire water, carbohydrates, and mineral nutrients from their hosts through invasive structures called haustoria. More and more studies have repeatedly demonstrated that the host plants secondary metabolites,which be acquired by the parasite, will affect the e...