Table 2.

Effects of seed soaking treatments with spermidine (Spd) or cyclohexylamine (CHA) for 12 h on seed germination energy (GE), germination percentage (GP), germination index (GI) and vigor index (VI) of sweet corn, Xiantian No.5 under normal temperature (25 °C)

Treatment	GE (%)	GP (%)	GI	VI
Control	61 ± 2.31b	63 ± 2.31b	10.46 ± 0.71b	3.48 ± 0.39b
Spd	71 ± 2.31a	76 ± 1.02a	12.7 ± 0.71a	5.63 ± 0.44a
CHA	41 ± 4.62c	43 ± 2.31c	7.21 ± 1.10c	1.81 ± 0.29c

Values were mean ± SE (n = 3). Different small letter (s) following the values indicated significant difference (p < 0.05, Tukey’s HSD) among treatments. Control, seeds soaked in distill water as a control; Spd, seeds soaked in 0.9 mM spermidine solution; CHA, seeds soaked in 16 mM cyclohexylamine solution