We aimed to identify the main compounds responsible for low temperature-induced yellow pigmentation of the bracts of Zantedeschia aethiopica ‘Wedding March’. On the basis of the area ratios estimated from absorbance at 400 nm in HPLC analyses, we identified two flavonoids, isoorientin and swertiajaponin, as such compounds. We also identified two additional flavonoids, isovitexin and swertisin, which do not contribute considerably to the yellow pigmentation. Flavonoids of Zantedeschia bracts seem to belong to the class of flavone C-glycosides.
ChristiePJAlfenitoMRWalbotV. (1994) Impact of low-temperature stress on general phenylpropanoid and anthocyanin pathways: enhancement of transcript abundance and anthocyanin pigmentation in maize seedlings. Planta, 194, 541–549.
2.
SaniewskiM, HorbowiczM. (2005) Changes in endogenous flavonoids level during cold storage of tulip bulbs. Acta Horticulturae, 669, 245–251.
3.
LewisDHArathoonHSSwinnyEEHuangSCFunnellKA. (2003) Anthocyanin and carotenoid pigments in spathe tissue from selected Zantedeschia hybrids. Acta Horticulturae, 624, 147–154.
4.
JayM. (1994). C-Glycosylflavonoids. In The Flavonoids. Advances in Research since 1986.HarborneJB. (Ed), Chapman and Hall/CRC, London, 57–93.
5.
PengJ, FanG, HongZ, ChaiY, WuY. (2005) Preparative separation of isovitexin and isoorientin from Patrinia villosa Juss by high-speed counter-current chromatography. Journal of Chromatography A, 1074, 111–115.
FankJHPowder-GeorgeYLRamsewakRSReynoldsWF. (2012) Variable-temperature 1H-NMR studies on two C-glycosylflavones. Molecules, 17, 7914–7926.
8.
BrouillardR, DanglesO. (1994) Flavonoids and flower colour. In The flavonoids. Advances in Research since 1986. HarborneJB. (Ed). Chapman and Hall/CRC, London, 566–588.