正常性种子与顽拗性种子具有不同的发育特性和脱水耐性，顽拗性种子与正常性种子的重要区别在于种子不经过成熟脱水，在整个发育过程中保持代谢活性，对脱水高度敏感。本文从种子发育和萌发的主要事件、种子从发育到萌发转变的开关及顽拗性种子是发育中的幼苗等方面综述了两类不同种子从发育到萌发转变的调节机制。 Normal seeds and recalcitrant seeds have different developmental traits and dehydration tolerance. The important difference between recalcitrant seeds and normal seeds is that the seeds are not mature dehydrated, remain metabolically active throughout the development, and are highly sensitive to dehydration. In this paper, the main mechanisms of seed development and germination, the switch of seeds from development to germination, and the recalcitrant seed developmental seedlings were reviewed in this paper.