Claim · model-written summary
The authors propose that intermolecular copigmentation produces the violet-blue flower color.
Verbatim
e0“intermolecular copigmentation between malvidin 3- O -acetylrutinoside-5- O -glucoside and apigenin 4′- O -glucuronide may be responsible for the violet-blue flower color of S . ‘Thamires’”
Title
Three acylated anthocyanins and a flavone glycoside in violet-blue flowers of Saintpaulia ‘Thamires’
F. Tatsuzawa; M. Hosokawa; N. Saito; et al. South African Journal of Botany 2012. doi:10.1016/j.sajb.2011.12.001
Other claims from this paper (8)
- Observation Three new acylated anthocyanins were isolated from Saintpaulia flowers.
- Observation The new anthocyanins were characterized as derivatives of malvidin, peonidin and pelargonidin.
- Observation Malvidin acetylrutinoside glucoside was the dominant pigment in the violet-blue flowers.
- Observation The isolated flavone was identified as apigenin glucuronopyranoside.
- Observation Fresh violet-blue petals and crude extracts showed maxima at 547 and 577 nm and a shoulder near 620 nm.
- Observation The isolated malvidin pigment and its deacylated form had one absorption maximum at 535 nm.
- Intervention effect Addition of apigenin glucuronide changed malvidin pigment color from violet to violet-blue.
- Observation The violet-blue pigment solution showed two maxima at 547 and 577 nm and a shoulder near 620 nm.