Effects of Nitrogen and Phosphorus Supply on Root Morphology of Two Pedicularis Species The Effects of Different Lights and Gibberellin on Establishment of Parasitism between Dodder and Its Hosts Transformation of Antisense Wheat Mlo (Ta-Mlo) Gene and Wheat Powdery Mildew Resistance Analysis of Transgenic Plants Anatomical and Histochemical Studies of Haustrial Development of Cassytha filiformis L. Parasite plants chemical recognition to host Characteristics of haustorium of holoparasite Cuscuta campestris