对珙桐核果进行解剖观察研究表明,珙桐果核壁细胞高度木质化增厚和各组成成分在三维空间排列上的相互穿插、纵横交织、彼此嵌合的结构特点,是导致珙桐种子难于萌发,长期处于休眠状态的最主要原因。其胚胎发育上的不成熟性,加重了种子休眠的双重性。提出克服果核障碍,是克服种子休眠的关键。 Anatomical observation of the Davidia involucrate observation showed that the Paulownia fruit nuclear cell wall thickening of the lignification and thickening of the composition of the three-dimensional space arranged in the interpenetrating, crisscrossed, the structure of each other chimerism is the result of Davidia involucrata seed is difficult Germination, long-term sleep in the most important reason. The embryonic development of immaturity, increased seed dormancy duality. Proposed to overcome nuclear barriers, is to overcome the key to seed dormancy.