Coat-imposed dormancy ie seed coat or endosperm enclosing the embryo exert a constraint that the embryo can not overcome. Possible effects of coat-imposed dormancy: 1. Interference with water uptake 2. Mechanical restraint 3. Interference with gas exchange 4. Prevention of the exit of inhibitors from the embryoThe seed coat or endosperm enclosing the embryo exert a constraint that the embryo can not overcome. ME LE Coat-imposed dormancy Possible effects of coat-imposed dormancy: 1. Interference with water uptake 2. Mechanical restraint 3. Interference with gas exchange 4. Prevention of the exit of inhibitors from the embryo