The polymerase chain reaction (PCR) has been a reliable and fruitful method for many applications in ecology. Neverthele......

用DGD包埋去包埋方法,观察了洋葱花粉母细胞中胞间连丝和胞质通道内的胞质骨架分布.结果发现,在花粉母细胞的胞间连丝内有胞质骨架......