Table 2. Concentration of GAs in the Leaves of Cm-BBX24-OX/RNAi and Wild-Type Chrysanthemum Lines under SD and LD.

Daylength	Lines	GA Content (ng⋅g−1 FW)
		GA1	GA4	GA19	GA24	GA20	GA3	GA8
SD	Cm-BBX24-RNAi	1.73 ± 0.17 a	0.33 ± 0.04 a	1.10 ± 0.16 a	0.31 ± 0.07 a	0.35 ± 0.03 a	0.34 ± 0.05 a	0.80 ± 0.23 a
	Wild type	1.64 ± 0.19 a	0.22 ± 0.05 b	0.94 ± 0.17 a	0.29 ± 0.05 a	0.36 ± 0.09 a	0.38 ± 0.09 a	0.60 ± 0.06 a
	Cm-BBX24-OX	1.46 ± 0.13 a	0.23 ± 0.04 b	1.02 ± 0.14 a	0.21 ± 0.06 a	0.37 ± 0.06 a	0.42 ± 0.09 a	0.56 ± 0.23 a
LD	Cm-BBX24-RNAi	1.45 ± 0.26 a	0.34 ± 0.03 a	1.40 ± 0.04 a	nd	0.43 ± 0.04 a	0.21 ± 0.03 a	1.04 ± 0.34 a
	Wild type	0.62 ± 0.11 b	0.18 ± 0.01 b	0.67 ± 0.07 b	nd	0.28 ± 0.07 b	0.19 ± 0.04 a	0.69 ± 0.18 a
	Cm-BBX24-OX	0.37 ± 0.08 c	0.12 ± 0.01 c	0.58 ± 0.05 b	nd	0.32 ± 0.02 b	0.20 ± 0.02 a	0.94 ± 0.07 a

Cm-BBX24-OX, the wild type, Cm-BBX24-RNAi, and three different chrysanthemum lines. SD, 8-h SD; LD, 16-h LD. Significant differences were determined by Duncan’s multiple range test (P < 0.05, n = 3), and lowercase letters, a to c, indicate significant differences between wild-type and transgenic plants under SD or LD condition. nd, endogenous GA not detected, deuterated GA internal standard present. GA₅, GA₉, GA₂₉, GA₃₄, and GA₅₁ were not detected.