【摘要】 目的:了解管花肉苁蓉寄生过程。方法:变档体视显微镜观察管花肉苁蓉种子萌发和寄生过程的形态结构。结果:①管花肉苁蓉种子不接触寄主柽柳根,可独立萌发。②种子萌发首先从种孔长出芽管,其顶端与寄主根接触并膨大为吸器,吸器侵入寄主根,使寄主根维管束内充满褐色物质。③管花肉苁蓉幼体撑破芽管而出,其上可见6~7个鳞叶突起的;断裂的芽管、胚乳细胞残留体及种皮脱落。④近茎端的根明显膨大变粗;远茎端的寄主根则逐渐萎缩。结论:寄生过程遵循种子萌发长出芽管,接触寄主根形成吸器并侵入寄主根,管花肉苁蓉幼体出现3个阶段。更多还原

【Abstract】 Objective: To understand the process of Cistanche tubulosa.Method: The process of seed germination and parasitism was observed using stereomicroscope.Result: Seedling of C.tubulosa sprouted after forty day without host root’s contact in fields,a tube-like-organ formed and grew auger-type from host root,the tuber apex where touches host root swelled and formed haustorium.Haustorium intruded host root epidermis and vascular bundles,and released brown substances.Then,embryo bud with six or more young leaves formed,finally the swelled tuber-like-organ broken and seed coat shed.Due to the parasitism of C.tubulosa,the host root near stem site swelled,but the other part,shrunk and disappered gradually.Conclusion: Seed of C.tubulosa could germinate indepently in fields.Tuber-like-organ formatin,haustorium formation and bud formation are key steps of C.tubulosa seedling development.更多还原