Moreover, endogenous Spm concentration was significantly correlated with germination
percentage, germination energy and germination index with R2 values above 50%, suggesting that theSpmconcentration might be more suitable to forecast seed germinability during seed maturation than Spd and Put. In conclusion, it could be presumed that endogenous Spd and Spm in free form had more effect than Put during seed development progress of sweet corn.