Fig. 1

Flowering state at night and analysis of volatile components in petals of C. nocturnum. (A) Flowers at different times: (a) 18:00 (CK); (b) 20:00; (c) 22:00; (d) 24:00; (e) 02:00; (f) 04:00; (g) 06:00. (B) Peak area variation of volatiles: (a) total peak area; (b) phenylpropanoids; (c) terpenoids; (d) fatty acid derivatives. (C) Total ion chromatogram (TIC) of volatiles at different times: (a) 18:00 (CK); (b) 20:00; (c) 22:00; (d) 24:00; (e) 02:00; (f) 04:00; (g) 06:00.