Fig. 7

The expression of six candidate genes during CH–CL flower development in V. prionantha. (A) Expression of VprGI, VprCO, VprSOC1, VprUFO, VprAP3, and VprPI under 10-h daylight. (B) Expression of the six genes under 12-h daylight. (C) Expression of the six genes under 16-h daylight. (D) Expression variation of the six genes in response to different times of illumination and days after switching from 10-h daylight to 16-h daylight. Gene expression in flower buds around S1 (f1), S2 (f2), S3 (f3), S4 (f4), and S5 (f5) under 10-, 12-, and 16-h daylight (A–C) or equal mixture of f1 and f2 buds under 10, 12, 14, and 16 h of illumination, and 1, 2, 5, 6, and 8 days after the plants switched from 10-h daylight to 16-h daylight (D) evaluated using qRT-PCR. The gene expression in f1 under 10-h daylight was set to 1 in A, B, and C, while gene expression in 10-h illumination was set to 1 in D. Three independent biological samples were used in the analyses. Means and standard errors are presented. Significant differences are presented in Table S24