Seeds were considered to be germinated when the radicle
emerged through the seed coat and reached more than 2 mm in
length. The number of germinated seeds for each cultivar and
treatment was recorded every day. Germination percentages (GP)
and germination index (GI) were calculated using the following
equations:
GP ¼ n/N 100%, where n is the number of germination, and N
represents the total number of tested seeds;
GI ¼ P(Gt/Dt), where Gt is the number of seed germinated at t
day, and Dt represents the corresponding day of germination;