Anthocyanins in the spathes of Anthurium andreanum were identified as cyanidin 3-rhamnosyIgluco-side and pelargonidin 3-rhamnosylglucoside. Both pigments were present in the red cultivars, ‘Ozaki’, Kaumana', ‘Kozohara’, ‘Kansako No. 1’, and ‘Nakazawa’, and in the pink cultivar, ‘Marian Seefurth’. The orange cultivar, ‘Nitta’, and the coral colored ‘Tateishi Coral’ contained only pelargonidin 3-rhamnosylglucoside.
Spathe color is shown to be determined by relative concentrations of the anthocyanins cyanidin 3-rhamnosylglucoside and pelargonidin 3-rhamnosylglucoside in Anthurium andraeanum Linden ex Andre. A predominance of cyanidin 3-rhamnosylglucoside results in pink to dark red colors, whereas a predominance of pelargonidin 3-rhamnosylglucoside results in coral to orange. A flavone present in large and variable amounts was characterized but not demonstrated to have a modifying effect on cyanic shades.
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