Fig. 8
From: Assessment of violet-blue color formation in Phalaenopsis orchids
Absorption spectra of anthocyanin extract from P. Big Chili. (A) Flower of P. Big Chili, (B) anthocyanin extract from flowers of P. Big Chili at different pH values, (D) absorption spectra of tepal crude extracts at different pH values. Scale bar is 2.5 cm. (D) Absorption spectra of anthocyanin extract at different times. Visible absorption spectra of tepal crude extracts from P. OX Honey ‘OX1372’ at various pH values, including (a) 2.9, (b) 3.4, (c) 4.2, (d) 4.6, (e) 5.6, and (f) 6.3 incubated for 0 h (red line), 24 h (green line) and 96 h (red line)