许多养花人都知道兰花非常难于人工繁殖,但多数人不知道这是为什么。其实,这主要是因为兰花的种子非常细小,其自身无法贮存养分,所以兰花种子在自然条件下,其萌发阶段要完全依靠菌根真菌为其提供养分。而兰花的成年植株,由于其根部没有根毛,也必需依靠共生真菌来帮助吸收矿物质和水分。天麻是兰科植物中非常重要的药材, Many flower-growers know that orchids are very difficult to artificially breed, but most people do not know why. In fact, this is mainly because the seeds of orchids are very small and can not store nutrients by themselves. Therefore, under the natural conditions, orchid seeds rely on mycorrhizal fungi to provide nutrients for their germination stage. And adult orchids, due to their absence of root hairs, must also rely on symbiotic fungi to help absorb minerals and water. Gastrodia orchid plant is very important herbs,