细叶百合鳞茎在低温解除休眠过程中茎尖细胞超微结构的变化

 研究了细叶百合鳞茎低温处理打破休眠过程中的形态变化及茎尖细胞超微结构的变化。结果表明，低温处理0 ~ 12 d，鳞茎物质和能量代谢较弱，鳞茎不能萌发；12 ~ 48 d，鳞茎萌发率较低，线粒体及高尔基体分泌囊泡增多，细胞通过质膜内吞及胞间连丝进行物质交流；48 ~ 72 d，核仁松散，内质网有序排列，在液泡膜与质膜边缘形成内质网桥，内质网桥一直延伸到核膜方向，胞内及胞间联系已经建立；出芽时，内质网桥延伸到胞间连丝，细胞器内部结构及数量增加，休眠完全打破。

The Apical Bud Cell Ultra-structure Changes of Lilium pumilum Bulbs During Breaking Dormancy Under Refrigerated Condition

The bulb apical bud cell ultra-structure changes of Lilium pumilum bulbs during breaking dormancy under refrigerated condition were studied. Results showed that the material and energy metabolism of bulbs were weak between 0 to 12 days and bulbs couldn’t sprout；The germination rate of bulbs was lower and mitochondria and golgi vesicles increased，cells exchanged materials through the plasma membrane endocytosis and plasmodesmata between 12 to 48 days. Nucleoli were incompact and endoplasmic reticulums scattered orderly between 48 to 72 days，and endoplasm bridges formed at the edges of vacuole membrane and plasma membrane，with some of them extending to the nuclear envelope. Intracellular and intercellular connection had been established in this period. Endoplasm bridges and the plasmodesmata connected in budding period，and the internal structures and quantity of organelles increased obviously，dormancy is completely broken in this period.