3.3.1. Germination

3.3.1. Germination

 

  Germination starts with the growth of embryos. It is defined as the time when the embryo splits the outer membrane of seeds and part of the tissue appears. Another view is that gemination is defined as the time when the normal growth of next generation plants can be established. When the rice seed begins to germinate, the basal part of the lemma swells gradually. The embryo is protruded. And the plumule and radicle appear breaking lemma. This stage is designated by farmers as a 'pigeon-breasted condition'. When the hull is broken and the white embryo appears, the coleoptile begins to grow and the promodia of the first and second leaves begin to elongate a little. Reserve substances of the emdosperm are hydrolyzed near the embryo, and are absorbed and utilized by the embryo. Embryo growth depends on temperature and availability of water and air.