Varietal differences in flower colors of Cattleya aurantiaca
1992
Matsui, S. (Gifu Univ. (Japan). Faculty of Agriculture)
Compared with typical orange petals in C. aurantiaca, yellow ones contained a markedly low amount of carotenoids and also showed a hypsochromic shift of the spectral absorption. These changes were ascribed to decreases in gamma-carotene, a main component of the orange variety, and lycopene contents, and to relative increases in xanthophylls. A red variety showed a spectral absorption curve indicating the coexistence of carotenoids and anthocyanins. The rates of each carotenoid to total amounts contained in its petals were similar to those of the orange one
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