**3. Types of seed dormancy**

There are several categories of seed dormancy classification in literatures. However, seed dormancy may be classified based on the following schemes [15];


#### iii.Mode of action

	- a.**Primary dormancy:** this is an inherent dormancy status of a maturing seed when its fully developed on the parent plant. This is when the seed is released from the mother plant in a dormant state.
	- a.**Embryo induced dormancy:** the dormancy is within the embryo itself and usually caused by undeveloped or complete dormant embryo
	- b.**Coat induced dormancy:** This is the dormancy which resides within the structure (seed coat) enclosing the embryo and caused by extreme hardness of the seed coat.

Generally, seed dormancy could either be exogenous or endogenous dormancy.
