A colored flare fired from a Very pistol. 维利式信号枪发射的彩色信号弹。
Self-incompatibility ( SI) is a very important genetic mechanism to avoid close relative heredity and increase mutation for many flowering plants. Actually, it is a cell signal transduction pathway after the recognition between the ligand in pollen and the receptor in pistol. 自交不亲和性是显花植物一种重要的防止近亲遗传、增加变异的机制,其实质则是一种由花粉和柱头中的配体和受体相互识别后引发的细胞信号转导过程。